WO2024055761A1 - Multi-band low-noise amplifier and communication device - Google Patents

Multi-band low-noise amplifier and communication device Download PDF

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Publication number
WO2024055761A1
WO2024055761A1 PCT/CN2023/109902 CN2023109902W WO2024055761A1 WO 2024055761 A1 WO2024055761 A1 WO 2024055761A1 CN 2023109902 W CN2023109902 W CN 2023109902W WO 2024055761 A1 WO2024055761 A1 WO 2024055761A1
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Prior art keywords
capacitor
switch
output
resistance
resistor
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PCT/CN2023/109902
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French (fr)
Chinese (zh)
Inventor
苏俊华
郭嘉帅
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深圳飞骧科技股份有限公司
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Publication of WO2024055761A1 publication Critical patent/WO2024055761A1/en

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Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
    • H03F1/56—Modifications of input or output impedances, not otherwise provided for
    • H03F1/565—Modifications of input or output impedances, not otherwise provided for using inductive elements
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
    • H03F1/08—Modifications of amplifiers to reduce detrimental influences of internal impedances of amplifying elements
    • H03F1/12—Modifications of amplifiers to reduce detrimental influences of internal impedances of amplifying elements by use of attenuating means
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
    • H03F1/26—Modifications of amplifiers to reduce influence of noise generated by amplifying elements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/06—Receivers
    • H04B1/16—Circuits

Definitions

  • the invention relates to the field of electronic technology, and in particular to a multi-band low-noise amplifier and communication equipment.
  • Low-noise amplifiers are usually used in radio frequency receivers to amplify signals.
  • existing radio frequency receivers are generally implemented using multiple independent low-noise amplifiers, that is, multiple independent low-noise amplifiers.
  • these low-noise amplifiers work in different frequency bands, and then a switch is used to select the low-noise amplifier in the desired frequency band.
  • a switch is used to select the low-noise amplifier in the desired frequency band.
  • Embodiments of the present invention provide a multi-band low-noise amplifier and communication equipment, which can realize multi-band low-noise amplification functions while reducing the area occupied by the low-noise amplifier, which is conducive to improving chip miniaturization.
  • the present invention provides a multi-band low-noise amplifier, including a plurality of signal input terminals, a plurality of first inductors connected to the plurality of signal input terminals in one-to-one correspondence, and the A plurality of switch switching units, a bypass matching network, a common source stage amplification unit, an output matching network, a resistance attenuation network, a bypass output switch, an amplification output switch and a signal output terminal connected in a one-to-one correspondence with a plurality of first inductors;
  • Each of the switch switching units includes a first switch and a second switch
  • the common source stage amplification unit includes a first transistor, a second transistor, a DC blocking capacitor, a voltage stabilizing capacitor, a choke inductor and a feedback inductor;
  • each first inductor is connected to the corresponding signal input end, and the first end of the first switch and the first end of the second switch of each switch switching unit are connected to the corresponding third
  • the second end of an inductor the second end of the first switch is connected to the input end of the bypass matching network, the second end of the second switch is connected to the first end of the DC blocking capacitor, so The second end of the DC blocking capacitor is connected to the gate of the first transistor, and the source of the first transistor is grounded through the feedback inductor.
  • the drain of the first transistor is connected to the source of the second transistor, the gate of the second transistor is connected to ground through the voltage stabilizing capacitor, and the drain of the second transistor is connected to the supply voltage through the choke inductor.
  • the input end of the output matching network is connected to the drain of the second transistor, the output end of the output matching network is connected to the input end of the resistance attenuation network through the amplification output switch, and the bypass
  • the output end of the matching network is connected to the input end of the resistance attenuation network through the bypass output switch, and the output end of the resistance attenuation network is connected to the signal output end.
  • each of the switch switching units further includes a third switch, the first end of each third switch is connected to the second end of the corresponding first inductor, and the second end of each third switch Ground.
  • the output matching network includes a first variable capacitor
  • the first end of the first variable capacitor is the input end of the output matching network and is connected to the drain of the second transistor.
  • the second end of the first variable capacitor is the input end of the output matching network.
  • the output terminal is connected to the amplification output switch.
  • the first variable capacitor includes a first capacitor group, a second capacitor group and a third capacitor group
  • the first capacitor group includes one or multiple first capacitor branches connected in parallel, each of the first capacitor branches includes a connected first capacitor and a first capacitor switch, and the second capacitor group includes a Or multiple second capacitor branches connected in parallel, each of the second capacitor branches includes a connected second capacitor and a second capacitor switching switch, and the third capacitor group includes one or multiple third capacitors connected in parallel. branches, each of the third capacitor branches includes a connected third capacitor and a third capacitor switching switch;
  • first end of the first capacitor branch is connected to the first end of the second capacitor branch as the first end of the first variable capacitor
  • the first end of the first capacitor branch is Two ends are connected to the first end of the third capacitor branch to serve as the second end of the first variable capacitor, and the second end of the second capacitor branch and the third end of the third capacitor branch are The second end is both grounded.
  • the resistance attenuation network includes a fourth switch and a variable resistor
  • the first end of the fourth switch is connected to the first end of the variable resistor to serve as the input end of the resistance attenuation network and is connected to the bypass output switch and the amplification output switch.
  • the second end of the fourth switch is connected to the second end of the variable resistor to serve as the output end of the resistance attenuation network and is connected to the signal output end.
  • variable resistor includes a first resistance group, a second resistance group and a third resistance group
  • the first resistance group includes one or a plurality of first resistance branches connected in parallel, each of the first resistance branches includes a connected first resistor and a first resistance switch, and the second resistance group includes a or a plurality of second resistor branches connected in parallel, each of the second resistor branches includes a connected second resistor and a second resistance switch, and the third resistor group includes one or a plurality of third resistors connected in parallel. branches, each of the third resistance branches includes a connected third resistor and a third resistance switch;
  • first end of the first resistance branch is connected to the first end of the second resistance branch as the first end of the variable resistor
  • the second end of the first resistance branch is The end is connected to the first end of the third resistance branch as the second end of the variable resistor, the second end of the second resistance branch and the second end of the third resistance branch Both terminals are grounded.
  • bypass matching network includes a second variable capacitor, a fourth capacitor, a fifth capacitor, a sixth capacitor and a second inductor;
  • the first end of the second variable capacitor is connected to the first end of the fourth capacitor to serve as the input end of the bypass matching network and is connected to the second end of the first switch.
  • the second end of the four capacitors is connected to ground, the second end of the second variable capacitor is connected to the first end of the fifth capacitor and the first end of the second inductor, and the second end of the second inductor is connected to the ground.
  • the second end of the fifth capacitor is connected to the first end of the sixth capacitor to serve as the output end of the bypass matching network and is connected to the bypass output switch.
  • the sixth capacitor The second terminal is grounded.
  • the second variable capacitor includes a plurality of fourth capacitor branches connected in parallel, and each of the fourth capacitor branches includes a connected seventh capacitor and a fourth capacitor switching switch.
  • the common source stage amplification unit further includes a first bias resistor and a second bias resistor;
  • the first end of the first bias resistor is connected to the gate of the first transistor, the second end of the first bias resistor is connected to the first bias signal; the first end of the second bias resistor is connected to the gate of the first transistor.
  • the second end of the second bias resistor is connected to the gate of the second transistor, and the second end of the second bias resistor is connected to the second bias signal.
  • the present invention also provides a communication device, including the multi-band low-noise amplifier described in any one of the above.
  • a plurality of switch switching units are respectively connected to a plurality of signal input terminals in a one-to-one correspondence, wherein each switch switching unit includes a first switch and a second switch.
  • the switch and the second switch are respectively connected to the bypass matching network and the common source stage amplification unit, whereby by controlling the on and off of the first switch and the second switch, the signal can be passed from the bypass matching network to Network output or output after amplification by a common source stage amplification unit, and by setting multiple signal input terminals, multiple signals of different frequency bands can be input, and multiple switch switching units can realize switching of different signal input terminals.
  • the first switch or the second switch in the switch switching unit connected to the signal input terminal can be turned on, and the first switch and the second switch of the switch switching unit connected to other signal input terminals can be turned on.
  • the switches are all closed, which allows the low-noise amplifier to access the signal input from one signal input terminal and perform bypass output or amplified output. Therefore, through this solution, multi-input multi-band functions can be achieved, and multiple signal input terminals can be shared.
  • a common-source amplification unit can greatly reduce the area occupied and is conducive to chip miniaturization.
  • FIG1 is a schematic diagram of the structure of a multi-band low noise amplifier provided by an embodiment of the present invention.
  • Figure 2 is a specific circuit diagram of the output matching network provided by the embodiment of the present invention.
  • Figure 3 is a specific circuit diagram of the resistance attenuation network provided by the embodiment of the present invention.
  • FIG. 4 is a specific circuit diagram of the bypass matching network provided by the embodiment of the present invention.
  • FIG. 5 is a specific circuit diagram of a multi-band low-noise amplifier provided by an embodiment of the present invention.
  • a multi-band low-noise amplifier 100 provided by an embodiment of the present invention includes a plurality of signal input terminals RFin1 ⁇ RFinn, and a plurality of first inductors LG1 ⁇ LGn connected to the plurality of signal input terminals RFin1 ⁇ RFinn in one-to-one correspondence. , a plurality of switch switching units S1 ⁇ Sn connected in one-to-one correspondence with the plurality of first inductors LG1 ⁇ LGn, a bypass matching network 11, a common source stage amplification unit, an output matching network 12, a resistance attenuation network 13, a bypass Output switch SB2, amplification output switch SB1 and signal output terminal RFout.
  • Each switch switching unit Sn includes a first switch SA1 and a second switch SA2.
  • the common source stage amplification unit includes a first transistor M1, a second transistor M2, a DC blocking capacitor CB, a voltage stabilizing capacitor CCG, and a choke inductor. LD and feedback inductor LS.
  • each first inductor LGn is connected to the corresponding signal input terminal RFinn
  • the first terminal of the first switch SA1 and the first terminal of the second switch SA2 in each switch switching unit Sn are connected to the second terminal of the corresponding first inductor LGn.
  • the second terminal of the first switch SA1 The terminal is connected to the input terminal of the bypass matching network 11, the second terminal of the second switch SA2 is connected to the first terminal of the DC blocking capacitor CB, and the second terminal of the DC blocking capacitor CB is connected to the The gate of the first transistor M1, the source of the first transistor M1 is grounded through the feedback inductor LS, the drain of the first transistor M1 is connected to the source of the second transistor M2, and the source of the first transistor M1 is grounded through the feedback inductor LS.
  • the gate of the second transistor M2 is connected to the ground through the voltage stabilizing capacitor CCG, the drain of the second transistor M2 is connected to the supply voltage VDD through the choke inductor LD, and the input end of the output matching network 12 is connected to the third
  • the drain of the two transistors M2 the output terminal of the output matching network 12 is connected to the input terminal of the resistance attenuation network 13 through the amplification output switch SB1, and the output terminal of the bypass matching network 11 passes through the bypass
  • the output switch SB2 is connected to the input end of the resistance attenuation network 13 , and the output end of the resistance attenuation network 13 is connected to the signal output end RFout.
  • the input signal at each signal input terminal resonates with the gate-source parasitic capacitance of the first transistor M1 through the corresponding first inductor, and the DC blocking capacitor CB separates the DC bias and radio frequency signals.
  • the plurality of first inductors LG1 to LGn are respectively used as input matching for the plurality of signal input terminals RFin1 to RFinn to provide input impedance matching.
  • the inductance value of each first inductor can be different. No, in practical applications, the inductance value of each first inductor can be set according to the frequency bands of different input signals, so that the input impedance of the entire low-noise amplifier 100 can operate in multiple frequency bands.
  • the signal can be output from the bypass matching network 11 or amplified by the common source stage amplification unit and output, and
  • multiple signal input terminals RFin1 ⁇ RFinn multiple signals of different frequency bands can be input, and multiple switch switching units S1 ⁇ Sn can be used to switch different signal input terminals.
  • the multi-input multi-band function can be realized, and multiple signal input terminals share a common source stage amplification unit. It can greatly reduce the occupied area and is conducive to chip miniaturization.
  • bypass mode signals of different frequency bands are input to the bypass matching network 11 and then undergo resonance. is directly output to the resistor attenuation network 13, whereby different bypass insertion losses can be obtained.
  • each switch switching unit Sn further includes a third switch SH, and the first end of each third switch SH is connected to the corresponding first inductor LGn.
  • the second terminal of each third switch SH is grounded.
  • the output matching network 12 includes a first variable capacitor, the first end of the first variable capacitor is the input end of the output matching network 12, and the second transistor M2 The drain of the capacitor is connected, and the second terminal of the first variable capacitor is the output terminal of the output matching network 12 and is connected to the amplification output switch SB1.
  • the output impedance of the output matching network 12 can be adjusted according to the frequency band of the input signal, so that the output matching network 12 can match input signals in different frequency bands.
  • the first variable capacitor includes a first capacitor group 21 , a second capacitor group 22 and a third capacitor group 23 .
  • the first capacitor group 21 includes one or multiple first capacitor branches connected in parallel. Each of the first capacitor branches includes a connected first capacitor C21 and a first capacitor switch S21.
  • the second capacitor The group 22 includes one or a plurality of second capacitor branches connected in parallel, each of the second capacitor branches includes a connected second capacitor C22 and a second capacitor switch S22, and the third capacitor group 23 includes one or more second capacitor branches connected in parallel.
  • a plurality of third capacitor branches are connected in parallel, and each third capacitor branch includes a connected third capacitor C23 and a third capacitor switching switch S23.
  • first end of the first capacitor branch is connected to the first end of the second capacitor branch as the first end of the first variable capacitor
  • the first end of the first capacitor branch is Two ends are connected to the first end of the third capacitor branch to serve as the second end of the first variable capacitor, and the second end of the second capacitor branch and the third end of the third capacitor branch are The second end is both grounded.
  • the first capacitor group 21 has a plurality of first capacitor branches connected in parallel
  • the second capacitor group 22 has a plurality of second capacitor branches connected in parallel
  • the third capacitor group 23 has a plurality of third capacitors connected in parallel.
  • the first end of a plurality of first capacitor branches in parallel is connected to the first end of a plurality of second capacitor branches in parallel
  • the connection node serves as the first end of the first variable capacitor to communicate with the second The drain connection of transistor M2
  • the parallel second ends of the first capacitor branches are connected to the first ends of the plurality of third capacitor branches in parallel
  • the connection node serves as the second end of the first variable capacitor to be connected to the amplification output switch SB1.
  • the second terminals of the plurality of second capacitor branches connected in parallel and the second terminals of the plurality of third capacitor branches connected in parallel are both grounded.
  • the capacitance value of the first variable capacitor can be changed, thereby achieving a change in the output impedance of the output matching network 12 . Therefore, the output impedance of the output matching network 12 can be adjusted according to the required operating frequency band.
  • the resistance attenuation network 13 includes a fourth switch S30 and a variable resistor.
  • the first end of the fourth switch S30 is connected to the first end of the variable resistor as the input end of the resistance attenuation network 13, and is connected with the bypass output switch SB2 and the amplification output switch SB1.
  • connection, the second end of the fourth switch S30 is connected to the second end of the variable resistor to serve as the output end of the resistance attenuation network 13, and is connected to the signal output end RFout.
  • variable resistor includes a first resistance group 31 , a second resistance group 32 and a third resistance group 33 .
  • the first resistor group 31 includes one or multiple first resistor branches connected in parallel. Each of the first resistor branches includes a connected first resistor R31 and a first resistance switch S31.
  • the second resistor The group 32 includes one or a plurality of second resistor branches connected in parallel, each of the second resistor branches includes a connected second resistor R32 and a second resistor switch S32, and the third resistor group 33 includes one or more second resistor branches connected in parallel.
  • a plurality of third resistance branches are connected in parallel, and each third resistance branch includes a connected third resistor R33 and a third resistance switching switch S33.
  • first end of the first resistance branch is connected to the first end of the second resistance branch as the first end of the variable resistor
  • the second end of the first resistance branch is The end is connected to the first end of the third resistance branch as the second end of the variable resistor, the second end of the second resistance branch and the second end of the third resistance branch Both terminals are grounded.
  • the first resistor group 31 has a plurality of first resistor branches connected in parallel
  • the second resistor group 32 has a plurality of second resistor branches connected in parallel
  • the third resistor group 33 has a plurality of third resistors connected in parallel.
  • the first end of the parallel connection of the plurality of first resistance branches is connected to the first end of the parallel connection of the plurality of second resistance branches
  • the connection node serves as the first end of the variable resistor to communicate with the bypass
  • the output switch SB2 is connected to the amplification output switch SB1
  • the second end of a plurality of first resistance branches in parallel is connected to the first end of a plurality of third resistance branches in parallel
  • the connection node serves as a variable resistor.
  • the second terminal is connected to the signal output terminal RFout connect.
  • the second ends of the parallel connection of the plurality of second resistance branches and the second ends of the parallel connection of the plurality of third resistance branches are both grounded.
  • the resistance value of the variable resistor can be changed, and thus different insertion losses can be obtained.
  • the bypass matching network 11 includes a second variable capacitor 41 , a fourth capacitor C42 , a fifth capacitor C43 , a sixth capacitor C44 and a second inductor LP.
  • the first end of the second variable capacitor 41 is connected to the first end of the fourth capacitor C42 as the input end of the bypass matching network 11, and is connected to the second end of the first switch SA1.
  • the second end of the fourth capacitor C42 is connected to ground
  • the second end of the second variable capacitor 41 is connected to the first end of the fifth capacitor C43 and the first end of the second inductor LP
  • the second end of the second inductor LP is connected to ground
  • the second end of the fifth capacitor C43 and the first end of the sixth capacitor C44 are connected to serve as the output end of the bypass matching network 11
  • the second end of the fifth capacitor C43 is connected to the ground.
  • the bypass output switch SB2 is connected, and the second terminal of the sixth capacitor C44 is connected to ground.
  • the second variable capacitor 41 includes a plurality of fourth capacitor branches connected in parallel, and each of the fourth capacitor branches includes a connected seventh capacitor C41 and a fourth capacitor switch S41.
  • the first end of a plurality of fourth capacitor branches connected in parallel is the first end of the second variable capacitor
  • the second end of a plurality of fourth capacitor branches connected in parallel is the second end of the variable capacitor.
  • the common source stage amplification unit further includes a first bias resistor R1 and a second bias resistor R2.
  • the first end of the first bias resistor R1 is connected to the gate of the first transistor M1, and the second end of the first bias resistor R1 is connected to the first bias signal BIAS1; the second bias The first end of the resistor R2 is connected to the gate of the second transistor M2, and the second end of the second bias resistor R2 is connected to the second bias signal BIAS2.
  • the three signal input terminals are RFin1 ⁇ RFin3 respectively.
  • the three first inductors are respectively are the first inductors LG1 to LG3, and the three switch switching units are respectively the switch switching units S1 to S3.
  • the first capacitor group, the second capacitor group and the third capacitor group Two capacitor branches are taken as an example, that is, there are two first capacitor branches, second capacitor branches and third capacitor branches.
  • Each of the first capacitor branches includes a connected first capacitor branch.
  • each of the second capacitor branches includes a connected second capacitor C22 and a second capacitor switch S22
  • each of the third capacitor branches includes a connected third capacitor switch.
  • the resistance branches in the first resistance group, the second resistance group and the third resistance group are all taken as an example, that is, the first resistance branch, the second resistance branch and the third resistance branch.
  • Each resistor branch has one, the first resistor branch includes a connected first resistor R31 and a first resistance switch S31, and the second resistor branch includes a connected second resistor R32 and a second resistor switch S31.
  • Switch S32, the third resistance branch includes a connected third resistance R33 and a third resistance switching switch S33.
  • there are three fourth capacitor branches as an example.
  • the first inductors LG1 to LG3 can be used as input inductors corresponding to different frequency bands.
  • the three fourth capacitor branches together form a switchable capacitor, that is, a second variable capacitor.
  • Each fourth capacitor branch is composed of a seventh capacitor C41 and a fourth capacitor switch S41.
  • the second variable capacitor and the fourth capacitor switch S41 are connected to each other.
  • the four capacitors C42, the second inductor LP, the fifth capacitor C43, and the sixth capacitor C44 together form a switchable bypass matching network 11.
  • the first inductor LGn and the bypass matching network 11 work together to make the input impedance resonate in the target operating frequency band to avoid excessive return loss.
  • the first inductor LGn, the feedback inductor LS, the gate-source parasitic capacitance of the first transistor M1 and the DC blocking capacitor CB jointly determine the resonant frequency of the input impedance, and the output resonant frequency is determined by the choke inductor LD and the output matching network 12 It is jointly determined that by adjusting the capacitance switch in the output matching network 12, the output resonant frequency can be the same as the input resonant frequency, and at this time, the gain of the low-noise amplifier 100 reaches the highest level.
  • S31, S32, S33, R31, R32, and R33 form two resistance attenuation networks 13 with different insertion loss levels, which can further attenuate or pass through the amplified or bypassed output signal.
  • the signal input to one of the signal input terminals can be selected to be output after being processed by the low-noise amplifier.
  • the signal input to the signal input terminal RFin1 corresponds to the signal input terminal RFin1.
  • the third switch SH of the switch switching unit S1 is turned off, and the third switch SH of the switch switching units S2 and S3 corresponding to other signal input terminals is closed, so that the signal input terminal RFin2 and the signal input terminal RFin3 are connected to the ground, so that the signal input terminal RFin2 and the signal input terminal RFin3 can be connected to the ground. This prevents the signals from the two signal input terminals from interfering with the signal at the signal input terminal RFin1.
  • the first switch SA1 and the second switch SA2 are both in the off state, thereby blocking the signals from the signal input terminals RFin2 and RFin3 from entering the circuit.
  • the low noise amplifier 100 can be made to work in the bypass mode or the amplification mode, that is, the signal can be controlled to pass through the bypass matching network.
  • 11 Direct output or amplified output from the common source stage amplification unit.
  • the first switch SA1 in the switch switching unit S1 is open, the second switch SA2 is closed, the bypass output switch SB2 is open, the amplification output switch SB1 is closed, and after the signal is amplified by the common source stage amplification unit, It is output to the resistance attenuation network 13 through the output matching network 12, wherein whether the amplified signal is attenuated can be controlled by controlling the on or off of the fourth switch S30.
  • the fourth switch S30 of the resistance attenuation network 13 is closed, , at this time, the amplified signal is not attenuated but is directly transmitted to the signal output terminal RFout for output.
  • the fourth switch S30 of the resistance attenuation network 13 is turned off, the amplified signal passes through the variable resistor of the resistance attenuation network 13 After further attenuation, it is output through the signal output terminal RFout.
  • the resistance value of the variable resistor can be changed, thereby changing the degree of signal attenuation.
  • the switches S31 and S32 can be controlled to be on and the switch S33 to be off, or the switches S31 and S33 can be controlled to be on and the switch S32 to be off, so that the resistance values of the two gears can be obtained.
  • the number of capacitive branches in the first variable capacitor and the second variable capacitor and the number of resistive branches in the variable resistor can be set according to actual needs, and are not specifically limited.
  • An embodiment of the present invention also provides a communication device, including the multi-band low-noise amplifier described in any of the above embodiments.

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Abstract

A multi-band low-noise amplifier (100), which is provided with a plurality of switch handover units (S1-Sn), which are respectively connected to a plurality of signal input ends (RFin1-RFinn) in a manner of corresponding to each other on a one-to-one basis, wherein each of the switch handover units (S1-Sn) comprises a first switch (SA1) and a second switch (SA2), the first switch (SA1) and the second switch (SA2) are respectively connected to a bypass matching network (11) and a common-source amplification unit. Therefore, by means of controlling the turning-on and turning-off of the first switch (SA1) and the second switch (SA2), a signal can be output from the bypass matching network (11) or can be output after being amplified by the common-source amplification unit; moreover, by means of providing the plurality of signal input ends (RFin1-RFinn), signals at a plurality of different bands can be input, and by means of the plurality of switch handover units (S1-Sn), the handover among different signal input ends (RFin1-RFinn) can be realized. The multi-band low-noise amplifier has the beneficial effects of being able to realize a multi-input multi-band function, and the plurality of signal input ends (RFin1-RFinn) share one common-source amplification unit, such that an occupied area can be greatly reduced, which facilitates the miniaturization of a chip.

Description

多频段低噪声放大器及通信设备Multi-band low noise amplifier and communication equipment 技术领域Technical field
本发明涉及电子技术领域，尤其涉及一种多频段低噪声放大器及通信设备。The invention relates to the field of electronic technology, and in particular to a multi-band low-noise amplifier and communication equipment.
背景技术Background technique
随着通信技术的发展，单个无线射频收发机兼容尽可能多的通信频带的需求大大增加，因而兼容多频段的射频接收机成为了通信领域的研究热点。射频接收机中通常都使用了低噪声放大器进行信号的放大，而为了实现多频段功能，现有的射频接收机一般是采用多个单独的低噪声放大器来实现，即多个单独的低噪声放大器并联，这些低噪声放大器分别工作在不同的频段，然后通过开关来选择所需频段的低噪声放大器。然而，上述方式中，由于需要设置多个并行的低噪声放大器，会大大增加低噪声放大器所占用的面积，不利于芯片小型化。With the development of communication technology, the demand for a single wireless radio frequency transceiver to be compatible with as many communication frequency bands as possible has greatly increased. Therefore, multi-band radio frequency receivers have become a research hotspot in the communication field. Low-noise amplifiers are usually used in radio frequency receivers to amplify signals. In order to achieve multi-band functions, existing radio frequency receivers are generally implemented using multiple independent low-noise amplifiers, that is, multiple independent low-noise amplifiers. In parallel, these low-noise amplifiers work in different frequency bands, and then a switch is used to select the low-noise amplifier in the desired frequency band. However, in the above method, since multiple parallel low-noise amplifiers need to be installed, the area occupied by the low-noise amplifier will be greatly increased, which is not conducive to chip miniaturization.
发明内容Contents of the invention
本发明实施例提供一种多频段低噪声放大器及通信设备，能够实现多频段的低噪放大功能的同时，减小低噪声放大器所占用的面积，有利于提高芯片小型化。Embodiments of the present invention provide a multi-band low-noise amplifier and communication equipment, which can realize multi-band low-noise amplification functions while reducing the area occupied by the low-noise amplifier, which is conducive to improving chip miniaturization.
为了解决上述技术问题，第一方面，本发明提供一种多频段低噪声放大器，包括多个信号输入端、与所述多个信号输入端一一对应连接的多个第一电感、与所述多个第一电感一一对应连接的多个开关切换单元、旁路匹配网络、共源级放大单元、输出匹配网络、电阻衰减网络、旁路输出开关、放大输出开关以及信号输出端；In order to solve the above technical problems, in a first aspect, the present invention provides a multi-band low-noise amplifier, including a plurality of signal input terminals, a plurality of first inductors connected to the plurality of signal input terminals in one-to-one correspondence, and the A plurality of switch switching units, a bypass matching network, a common source stage amplification unit, an output matching network, a resistance attenuation network, a bypass output switch, an amplification output switch and a signal output terminal connected in a one-to-one correspondence with a plurality of first inductors;
每个所述开关切换单元包括第一开关和第二开关，所述共源级放大单元包括第一晶体管、第二晶体管、隔直电容、稳压电容、扼流电感以及反馈电感；Each of the switch switching units includes a first switch and a second switch, and the common source stage amplification unit includes a first transistor, a second transistor, a DC blocking capacitor, a voltage stabilizing capacitor, a choke inductor and a feedback inductor;
其中，每个所述第一电感的第一端连接至对应的信号输入端，每个所述开关切换单元的第一开关的第一端和第二开关的第一端均连接至对应的第一电感的第二端，所述第一开关的第二端连接至所述旁路匹配网络的输入端，所述第二开关的第二端连接至所述隔直电容的第一端，所述隔直电容的第二端连接至所述第一晶体管的栅极，所述第一晶体管的源极通过所述反馈电感接地，所述 第一晶体管的漏极连接至所述第二晶体管的源极，所述第二晶体管的栅极通过所述稳压电容接地，所述第二晶体管的漏极通过所述扼流电感连接供电电压VDD，所述输出匹配网络的输入端连接至所述第二晶体管的漏极，所述输出匹配网络的输出端通过所述放大输出开关与所述电阻衰减网络的输入端连接，所述旁路匹配网络的输出端通过所述旁路输出开关与所述电阻衰减网络的输入端连接，所述电阻衰减网络的输出端连接至所述信号输出端。Wherein, the first end of each first inductor is connected to the corresponding signal input end, and the first end of the first switch and the first end of the second switch of each switch switching unit are connected to the corresponding third The second end of an inductor, the second end of the first switch is connected to the input end of the bypass matching network, the second end of the second switch is connected to the first end of the DC blocking capacitor, so The second end of the DC blocking capacitor is connected to the gate of the first transistor, and the source of the first transistor is grounded through the feedback inductor. The drain of the first transistor is connected to the source of the second transistor, the gate of the second transistor is connected to ground through the voltage stabilizing capacitor, and the drain of the second transistor is connected to the supply voltage through the choke inductor. VDD, the input end of the output matching network is connected to the drain of the second transistor, the output end of the output matching network is connected to the input end of the resistance attenuation network through the amplification output switch, and the bypass The output end of the matching network is connected to the input end of the resistance attenuation network through the bypass output switch, and the output end of the resistance attenuation network is connected to the signal output end.
进一步地，每个所述开关切换单元还包括第三开关，每个所述第三开关的第一端连接至对应的第一电感的第二端，每个所述第三开关的第二端接地。Further, each of the switch switching units further includes a third switch, the first end of each third switch is connected to the second end of the corresponding first inductor, and the second end of each third switch Ground.
进一步地，所述输出匹配网络包括第一可变电容器；Further, the output matching network includes a first variable capacitor;
所述第一可变电容器的第一端为所述输出匹配网络的输入端，与所述第二晶体管的漏极连接，所述第一可变电容器的第二端为所述输出匹配网络的输出端，与所述放大输出开关连接。The first end of the first variable capacitor is the input end of the output matching network and is connected to the drain of the second transistor. The second end of the first variable capacitor is the input end of the output matching network. The output terminal is connected to the amplification output switch.
进一步地，所述第一可变电容器包括第一电容组、第二电容组以及第三电容组；Further, the first variable capacitor includes a first capacitor group, a second capacitor group and a third capacitor group;
所述第一电容组包括一个或并联的多个第一电容支路，每个所述第一电容支路包括相连接的第一电容和第一电容切换开关，所述第二电容组包括一个或并联的多个第二电容支路，每个所述第二电容支路包括相连接的第二电容和第二电容切换开关，所述第三电容组包括一个或并联的多个第三电容支路，每个所述第三电容支路包括相连接的第三电容和第三电容切换开关；The first capacitor group includes one or multiple first capacitor branches connected in parallel, each of the first capacitor branches includes a connected first capacitor and a first capacitor switch, and the second capacitor group includes a Or multiple second capacitor branches connected in parallel, each of the second capacitor branches includes a connected second capacitor and a second capacitor switching switch, and the third capacitor group includes one or multiple third capacitors connected in parallel. branches, each of the third capacitor branches includes a connected third capacitor and a third capacitor switching switch;
其中，所述第一电容支路的第一端与所述第二电容支路的第一端相连接以作为所述第一可变电容器的第一端，所述第一电容支路的第二端与所述第三电容支路的第一端相连接以作为所述第一可变电容器的第二端，所述第二电容支路的第二端和所述第三电容支路的第二端均接地。Wherein, the first end of the first capacitor branch is connected to the first end of the second capacitor branch as the first end of the first variable capacitor, and the first end of the first capacitor branch is Two ends are connected to the first end of the third capacitor branch to serve as the second end of the first variable capacitor, and the second end of the second capacitor branch and the third end of the third capacitor branch are The second end is both grounded.
进一步地，所述电阻衰减网络包括第四开关和可变电阻器；Further, the resistance attenuation network includes a fourth switch and a variable resistor;
所述第四开关的第一端和所述可变电阻器的第一端相连接以作为所述电阻衰减网络的输入端，与所述旁路输出开关和所述放大输出开关连接，所述第四开关的第二端和所述可变电阻器的第二端相连接以作为所述电阻衰减网络的输出端，与所述信号输出端连接。The first end of the fourth switch is connected to the first end of the variable resistor to serve as the input end of the resistance attenuation network and is connected to the bypass output switch and the amplification output switch. The second end of the fourth switch is connected to the second end of the variable resistor to serve as the output end of the resistance attenuation network and is connected to the signal output end.
进一步地，所述可变电阻器包括第一电阻组、第二电阻组以及第三电阻组； Further, the variable resistor includes a first resistance group, a second resistance group and a third resistance group;
所述第一电阻组包括一个或并联的多个第一电阻支路，每个所述第一电阻支路包括相连接的第一电阻和第一电阻切换开关，所述第二电阻组包括一个或并联的多个第二电阻支路，每个所述第二电阻支路包括相连接的第二电阻和第二电阻切换开关，所述第三电阻组包括一个或并联的多个第三电阻支路，每个所述第三电阻支路包括相连接的第三电阻和第三电阻切换开关；The first resistance group includes one or a plurality of first resistance branches connected in parallel, each of the first resistance branches includes a connected first resistor and a first resistance switch, and the second resistance group includes a or a plurality of second resistor branches connected in parallel, each of the second resistor branches includes a connected second resistor and a second resistance switch, and the third resistor group includes one or a plurality of third resistors connected in parallel. branches, each of the third resistance branches includes a connected third resistor and a third resistance switch;
其中，所述第一电阻支路的第一端与所述第二电阻支路的第一端相连接以作为所述可变电阻器的第一端，所述第一电阻支路的第二端与所述第三电阻支路的第一端相连接以作为所述可变电阻器的第二端，所述第二电阻支路的第二端和所述第三电阻支路的第二端均接地。Wherein, the first end of the first resistance branch is connected to the first end of the second resistance branch as the first end of the variable resistor, and the second end of the first resistance branch is The end is connected to the first end of the third resistance branch as the second end of the variable resistor, the second end of the second resistance branch and the second end of the third resistance branch Both terminals are grounded.
进一步地，所述旁路匹配网络包括第二可变电容器、第四电容、第五电容、第六电容以及第二电感；Further, the bypass matching network includes a second variable capacitor, a fourth capacitor, a fifth capacitor, a sixth capacitor and a second inductor;
所述第二可变电容器的第一端和所述第四电容的第一端相连接以作为所述旁路匹配网络的输入端，与所述第一开关的第二端连接，所述第四电容的第二端接地，所述第二可变电容器的第二端与所述第五电容的第一端、所述第二电感的第一端相连接，所述第二电感的第二端接地，所述第五电容的第二端和所述第六电容的第一端相连接以作为所述旁路匹配网络的输出端，与所述旁路输出开关连接，所述第六电容的第二端接地。The first end of the second variable capacitor is connected to the first end of the fourth capacitor to serve as the input end of the bypass matching network and is connected to the second end of the first switch. The second end of the four capacitors is connected to ground, the second end of the second variable capacitor is connected to the first end of the fifth capacitor and the first end of the second inductor, and the second end of the second inductor is connected to the ground. The second end of the fifth capacitor is connected to the first end of the sixth capacitor to serve as the output end of the bypass matching network and is connected to the bypass output switch. The sixth capacitor The second terminal is grounded.
进一步地，所述第二可变电容器包括并联的多个第四电容支路，每个所述第四电容支路包括相连接的第七电容和第四电容切换开关。Further, the second variable capacitor includes a plurality of fourth capacitor branches connected in parallel, and each of the fourth capacitor branches includes a connected seventh capacitor and a fourth capacitor switching switch.
进一步地，所述共源级放大单元还包括第一偏置电阻和第二偏置电阻；Further, the common source stage amplification unit further includes a first bias resistor and a second bias resistor;
所述第一偏置电阻的第一端与所述第一晶体管的栅极连接，所述第一偏置电阻的第二端连接第一偏置信号；所述第二偏置电阻的第一端与所述第二晶体管的栅极连接，所述第二偏置电阻的第二端连接第二偏置信号。The first end of the first bias resistor is connected to the gate of the first transistor, the second end of the first bias resistor is connected to the first bias signal; the first end of the second bias resistor is connected to the gate of the first transistor. The second end of the second bias resistor is connected to the gate of the second transistor, and the second end of the second bias resistor is connected to the second bias signal.
第二方面，本发明还提一种通信设备，包括上述任一项所述的多频段低噪声放大器。In a second aspect, the present invention also provides a communication device, including the multi-band low-noise amplifier described in any one of the above.
有益效果：本发明的多频段低噪声放大器中，设置多个开关切换单元分别与多个信号输入端一一对应连接，其中每个开关切换单元中包括有第一开关和第二开关，第一开关和第二开关分别连接到旁路匹配网络和共源级放大单元，由此通过控制第一开关和第二开关的导通和关断，可以使得信号从旁路匹配网 络输出或者经共源级放大单元放大后输出，并且通过设置多个信号输入端可以输入多个不同频段的信号，而通过多个开关切换单元可以实现不同信号输入端的切换，如当需要其中一个信号输入端输入信号时，可以将该信号输入端所连接的开关切换单元中的第一开关或第二开关导通，并使其他信号输入端所连接的开关切换单元的第一开关和第二开关均关闭，由此可使得低噪声放大器接入一个信号输入端所输入的信号，并进行旁路输出或放大输出，因此通过本方案可以实现多输入多频段功能，并且多个信号输入端共用一个共源级放大单元，可以大大减少所占用的面积，有利于芯片小型化。Beneficial effects: In the multi-band low-noise amplifier of the present invention, a plurality of switch switching units are respectively connected to a plurality of signal input terminals in a one-to-one correspondence, wherein each switch switching unit includes a first switch and a second switch. The switch and the second switch are respectively connected to the bypass matching network and the common source stage amplification unit, whereby by controlling the on and off of the first switch and the second switch, the signal can be passed from the bypass matching network to Network output or output after amplification by a common source stage amplification unit, and by setting multiple signal input terminals, multiple signals of different frequency bands can be input, and multiple switch switching units can realize switching of different signal input terminals. For example, when one of the When the signal input terminal inputs a signal, the first switch or the second switch in the switch switching unit connected to the signal input terminal can be turned on, and the first switch and the second switch of the switch switching unit connected to other signal input terminals can be turned on. The switches are all closed, which allows the low-noise amplifier to access the signal input from one signal input terminal and perform bypass output or amplified output. Therefore, through this solution, multi-input multi-band functions can be achieved, and multiple signal input terminals can be shared. A common-source amplification unit can greatly reduce the area occupied and is conducive to chip miniaturization.
附图说明Description of drawings
下面结合附图，通过对本发明的具体实施方式详细描述，将使本发明的技术方案及其有益效果显而易见。The technical solutions and beneficial effects of the present invention will be apparent through a detailed description of specific embodiments of the present invention below in conjunction with the accompanying drawings.
图1是本发明实施例提供的多频段低噪声放大器的结构示意图；FIG1 is a schematic diagram of the structure of a multi-band low noise amplifier provided by an embodiment of the present invention;
图2是本发明实施例提供的输出匹配网络的具体电路图；Figure 2 is a specific circuit diagram of the output matching network provided by the embodiment of the present invention;
图3是本发明实施例提供的电阻衰减网络的具体电路图；Figure 3 is a specific circuit diagram of the resistance attenuation network provided by the embodiment of the present invention;
图4是本发明实施例提供的旁路匹配网络的具体电路图；Figure 4 is a specific circuit diagram of the bypass matching network provided by the embodiment of the present invention;
图5是本发明实施例提供的多频段低噪声放大器的具体电路图。FIG. 5 is a specific circuit diagram of a multi-band low-noise amplifier provided by an embodiment of the present invention.
具体实施方式Detailed ways
请参照图式，其中相同的组件符号代表相同的组件，本发明的原理是以实施在一适当的运算环境中来举例说明。以下的说明是基于所例示的本发明具体实施例，其不应被视为限制本发明未在此详述的其它具体实施例。Please refer to the drawings, in which the same component symbols represent the same components. The principles of the present invention are illustrated by implementation in a suitable computing environment. The following description is based on the illustrated specific embodiments of the present invention and should not be construed as limiting other specific embodiments of the present invention that are not described in detail here.
参阅图1，本发明实施例提供的多频段低噪声放大器100包括多个信号输入端RFin1～RFinn、与所述多个信号输入端RFin1～RFinn一一对应连接的多个第一电感LG1～LGn、与所述多个第一电感LG1～LGn一一对应连接的多个开关切换单元S1～Sn、旁路匹配网络11、共源级放大单元、输出匹配网络12、电阻衰减网络13、旁路输出开关SB2、放大输出开关SB1以及信号输出端RFout。Referring to FIG. 1 , a multi-band low-noise amplifier 100 provided by an embodiment of the present invention includes a plurality of signal input terminals RFin1˜RFinn, and a plurality of first inductors LG1˜LGn connected to the plurality of signal input terminals RFin1˜RFinn in one-to-one correspondence. , a plurality of switch switching units S1～Sn connected in one-to-one correspondence with the plurality of first inductors LG1～LGn, a bypass matching network 11, a common source stage amplification unit, an output matching network 12, a resistance attenuation network 13, a bypass Output switch SB2, amplification output switch SB1 and signal output terminal RFout.
每个所述开关切换单元Sn包括第一开关SA1和第二开关SA2，所述共源级放大单元包括第一晶体管M1、第二晶体管M2、隔直电容CB、稳压电容CCG、扼流电感LD以及反馈电感LS。Each switch switching unit Sn includes a first switch SA1 and a second switch SA2. The common source stage amplification unit includes a first transistor M1, a second transistor M2, a DC blocking capacitor CB, a voltage stabilizing capacitor CCG, and a choke inductor. LD and feedback inductor LS.
其中，每个所述第一电感LGn的第一端连接至对应的信号输入端RFinn， 每个所述开关切换单元Sn中的第一开关SA1的第一端和第二开关SA2的第一端均连接至对应的第一电感LGn的第二端，所述第一开关SA1的第二端连接至所述旁路匹配网络11的输入端，所述第二开关SA2的第二端连接至所述隔直电容CB的第一端，所述隔直电容CB的第二端连接至所述第一晶体管M1的栅极，所述第一晶体管M1的源极通过所述反馈电感LS接地，所述第一晶体管M1的漏极连接至所述第二晶体管M2的源极，所述第二晶体管M2的栅极通过所述稳压电容CCG接地，所述第二晶体管M2的漏极通过所述扼流电感LD连接供电电压VDD，所述输出匹配网络12的输入端连接至所述第二晶体管M2的漏极，所述输出匹配网络12的输出端通过所述放大输出开关SB1与所述电阻衰减网络13的输入端连接，所述旁路匹配网络11的输出端通过所述旁路输出开关SB2与所述电阻衰减网络13的输入端连接，所述电阻衰减网络13的输出端连接至所述信号输出端RFout。Wherein, the first end of each first inductor LGn is connected to the corresponding signal input terminal RFinn, The first terminal of the first switch SA1 and the first terminal of the second switch SA2 in each switch switching unit Sn are connected to the second terminal of the corresponding first inductor LGn. The second terminal of the first switch SA1 The terminal is connected to the input terminal of the bypass matching network 11, the second terminal of the second switch SA2 is connected to the first terminal of the DC blocking capacitor CB, and the second terminal of the DC blocking capacitor CB is connected to the The gate of the first transistor M1, the source of the first transistor M1 is grounded through the feedback inductor LS, the drain of the first transistor M1 is connected to the source of the second transistor M2, and the source of the first transistor M1 is grounded through the feedback inductor LS. The gate of the second transistor M2 is connected to the ground through the voltage stabilizing capacitor CCG, the drain of the second transistor M2 is connected to the supply voltage VDD through the choke inductor LD, and the input end of the output matching network 12 is connected to the third The drain of the two transistors M2, the output terminal of the output matching network 12 is connected to the input terminal of the resistance attenuation network 13 through the amplification output switch SB1, and the output terminal of the bypass matching network 11 passes through the bypass The output switch SB2 is connected to the input end of the resistance attenuation network 13 , and the output end of the resistance attenuation network 13 is connected to the signal output end RFout.
其中，各信号输入端的输入信号通过对应的第一电感与第一晶体管M1的栅源寄生电容产生谐振，隔直电容CB分离直流偏置和射频信号。可以理解的是，本发明实施例中，多个第一电感LG1～LGn分别作为多个信号输入端RFin1～RFinn的输入匹配，用于提供输入阻抗的匹配，各个第一电感的感值可以各不相同，在实际应用中可以根据不同输入信号的频段设置各个第一电感的感值，从而可以使得整个低噪声放大器100的输入阻抗工作在多个频段。The input signal at each signal input terminal resonates with the gate-source parasitic capacitance of the first transistor M1 through the corresponding first inductor, and the DC blocking capacitor CB separates the DC bias and radio frequency signals. It can be understood that in the embodiment of the present invention, the plurality of first inductors LG1 to LGn are respectively used as input matching for the plurality of signal input terminals RFin1 to RFinn to provide input impedance matching. The inductance value of each first inductor can be different. No, in practical applications, the inductance value of each first inductor can be set according to the frequency bands of different input signals, so that the input impedance of the entire low-noise amplifier 100 can operate in multiple frequency bands.
通过本实施例的低噪声放大器100，通过控制第一开关SA1和第二开关SA2的导通和关断，可以使得信号从旁路匹配网络11输出或者经共源级放大单元放大后输出，并且通过设置多个信号输入端RFin1～RFinn可以输入多个不同频段的信号，而通过多个开关切换单元S1～Sn可以实现不同信号输入端的切换，例如当需要其中一个信号输入端输入信号时，可以将该信号输入端所连接的开关切换单元中的第一开关或第二开关导通，并使其他信号输入端所连接的开关切换单元的第一开关和第二开关均关闭，由此可使得低噪声放大器100接入一个信号输入端所输入的信号，并进行旁路输出或放大输出，因此通过本方案可以实现多输入多频段功能，并且多个信号输入端共用一个共源级放大单元，可以大大减少所占用的面积，有利于芯片小型化。Through the low noise amplifier 100 of this embodiment, by controlling the on and off of the first switch SA1 and the second switch SA2, the signal can be output from the bypass matching network 11 or amplified by the common source stage amplification unit and output, and By setting multiple signal input terminals RFin1~RFinn, multiple signals of different frequency bands can be input, and multiple switch switching units S1~Sn can be used to switch different signal input terminals. For example, when one of the signal input terminals needs to input a signal, you can The first switch or the second switch in the switch switching unit connected to the signal input terminal is turned on, and the first switch and the second switch in the switch switching unit connected to the other signal input terminals are turned off, so that The low-noise amplifier 100 receives the signal input from one signal input terminal and performs bypass output or amplified output. Therefore, through this solution, the multi-input multi-band function can be realized, and multiple signal input terminals share a common source stage amplification unit. It can greatly reduce the occupied area and is conducive to chip miniaturization.
其中，在旁路模式下，不同频段的信号输入至旁路匹配网络11后经过谐振， 被直接输出至电阻衰减网络13，由此可以得到不同的旁路***损耗。Among them, in the bypass mode, signals of different frequency bands are input to the bypass matching network 11 and then undergo resonance. is directly output to the resistor attenuation network 13, whereby different bypass insertion losses can be obtained.
进一步地，本发明实施例的低噪声放大器100中，每个所述开关切换单元Sn还包括第三开关SH,每个所述第三开关SH的第一端连接至对应的第一电感LGn的第二端，每个所述第三开关SH的第二端接地。当需要接入其中一个信号输入端输入的信号时，例如需要接入信号输入端RFin1输入的信号时，将开关切换单元S1中的第三开关SH断开，将其他开关切换单元S2～Sn中的第三开关SH闭合，由此使得其他信号输入端RFin2～RFinn通过对应的第三开关接地，从而可以进一步避免其他信号输入端RFin2～RFinn的信号干扰。Further, in the low-noise amplifier 100 of the embodiment of the present invention, each switch switching unit Sn further includes a third switch SH, and the first end of each third switch SH is connected to the corresponding first inductor LGn. The second terminal of each third switch SH is grounded. When the signal input from one of the signal input terminals needs to be connected, for example, when the signal input from the signal input terminal RFin1 needs to be connected, the third switch SH in the switch switching unit S1 is turned off, and the other switch switching units S2~Sn are connected. The third switch SH is closed, thereby causing the other signal input terminals RFin2 to RFinn to be grounded through the corresponding third switch, thereby further avoiding signal interference from the other signal input terminals RFin2 to RFinn.
其中，本发明实施例中，所述输出匹配网络12包括第一可变电容器，所述第一可变电容器的第一端为所述输出匹配网络12的输入端，与所述第二晶体管M2的漏极连接，所述第一可变电容器的第二端为所述输出匹配网络12的输出端，与所述放大输出开关SB1连接。通过在输出匹配网络12中设置第一可变电容器，从而可以根据输入信号的频段调整输出匹配网络12的输出阻抗，以使得输出匹配网络12能够匹配不同频段的输入信号。In the embodiment of the present invention, the output matching network 12 includes a first variable capacitor, the first end of the first variable capacitor is the input end of the output matching network 12, and the second transistor M2 The drain of the capacitor is connected, and the second terminal of the first variable capacitor is the output terminal of the output matching network 12 and is connected to the amplification output switch SB1. By arranging the first variable capacitor in the output matching network 12, the output impedance of the output matching network 12 can be adjusted according to the frequency band of the input signal, so that the output matching network 12 can match input signals in different frequency bands.
进一步地，参阅图2，所述第一可变电容器包括第一电容组21、第二电容组22以及第三电容组23。Further, referring to FIG. 2 , the first variable capacitor includes a first capacitor group 21 , a second capacitor group 22 and a third capacitor group 23 .
所述第一电容组21包括一个或并联的多个第一电容支路，每个所述第一电容支路包括相连接的第一电容C21和第一电容切换开关S21，所述第二电容组22包括一个或并联的多个第二电容支路，每个所述第二电容支路包括相连接的第二电容C22和第二电容切换开关S22，所述第三电容组23包括一个或并联的多个第三电容支路，每个所述第三电容支路包括相连接的第三电容C23和第三电容切换开关S23。其中，所述第一电容支路的第一端与所述第二电容支路的第一端相连接以作为所述第一可变电容器的第一端，所述第一电容支路的第二端与所述第三电容支路的第一端相连接以作为所述第一可变电容器的第二端，所述第二电容支路的第二端和所述第三电容支路的第二端均接地。The first capacitor group 21 includes one or multiple first capacitor branches connected in parallel. Each of the first capacitor branches includes a connected first capacitor C21 and a first capacitor switch S21. The second capacitor The group 22 includes one or a plurality of second capacitor branches connected in parallel, each of the second capacitor branches includes a connected second capacitor C22 and a second capacitor switch S22, and the third capacitor group 23 includes one or more second capacitor branches connected in parallel. A plurality of third capacitor branches are connected in parallel, and each third capacitor branch includes a connected third capacitor C23 and a third capacitor switching switch S23. Wherein, the first end of the first capacitor branch is connected to the first end of the second capacitor branch as the first end of the first variable capacitor, and the first end of the first capacitor branch is Two ends are connected to the first end of the third capacitor branch to serve as the second end of the first variable capacitor, and the second end of the second capacitor branch and the third end of the third capacitor branch are The second end is both grounded.
更具体地，当第一电容组21有并联的多个第一电容支路、第二电容组22有并联的多个第二电容支路以及第三电容组23有并联的多个第三电容支路时，多个第一电容支路并联的第一端与多个第二电容支路并联的第一端相连接，且该连接节点作为第一可变电容器的第一端以与第二晶体管M2的漏极连接，多 个第一电容支路并联的第二端与多个第三电容支路并联的第一端相连接，且该连接节点作为第一可变电容器的第二端以与放大输出开关SB1连接。多个第二电容支路并联的第二端和多个第三电容支路并联的第二端均接地。More specifically, when the first capacitor group 21 has a plurality of first capacitor branches connected in parallel, the second capacitor group 22 has a plurality of second capacitor branches connected in parallel, and the third capacitor group 23 has a plurality of third capacitors connected in parallel. branch, the first end of a plurality of first capacitor branches in parallel is connected to the first end of a plurality of second capacitor branches in parallel, and the connection node serves as the first end of the first variable capacitor to communicate with the second The drain connection of transistor M2, more The parallel second ends of the first capacitor branches are connected to the first ends of the plurality of third capacitor branches in parallel, and the connection node serves as the second end of the first variable capacitor to be connected to the amplification output switch SB1. The second terminals of the plurality of second capacitor branches connected in parallel and the second terminals of the plurality of third capacitor branches connected in parallel are both grounded.
由此，通过控制各个电容支路中的电容切换开关的导通或关断，可以使得第一可变电容器的容值产生变化，进而实现输出匹配网络12的输出阻抗变化。因此，可以根据所需要的工作频段调整输出匹配网络12的输出阻抗。Therefore, by controlling the on or off of the capacitance switching switches in each capacitance branch, the capacitance value of the first variable capacitor can be changed, thereby achieving a change in the output impedance of the output matching network 12 . Therefore, the output impedance of the output matching network 12 can be adjusted according to the required operating frequency band.
参阅图3，本发明实施例的低噪声放大器100中，所述电阻衰减网络13包括第四开关S30和可变电阻器。所述第四开关S30的第一端和所述可变电阻器的第一端相连接以作为所述电阻衰减网络13的输入端，与所述旁路输出开关SB2和所述放大输出开关SB1连接，所述第四开关S30的第二端和所述可变电阻器的第二端相连接以作为所述电阻衰减网络13的输出端，与所述信号输出端RFout连接。Referring to FIG. 3 , in the low-noise amplifier 100 according to the embodiment of the present invention, the resistance attenuation network 13 includes a fourth switch S30 and a variable resistor. The first end of the fourth switch S30 is connected to the first end of the variable resistor as the input end of the resistance attenuation network 13, and is connected with the bypass output switch SB2 and the amplification output switch SB1. connection, the second end of the fourth switch S30 is connected to the second end of the variable resistor to serve as the output end of the resistance attenuation network 13, and is connected to the signal output end RFout.
进一步地，所述可变电阻器包括第一电阻组31、第二电阻组32以及第三电阻组33。所述第一电阻组31包括一个或并联的多个第一电阻支路，每个所述第一电阻支路包括相连接的第一电阻R31和第一电阻切换开关S31，所述第二电阻组32包括一个或并联的多个第二电阻支路，每个所述第二电阻支路包括相连接的第二电阻R32和第二电阻切换开关S32，所述第三电阻组33包括一个或并联的多个第三电阻支路，每个所述第三电阻支路包括相连接的第三电阻R33和第三电阻切换开关S33。Further, the variable resistor includes a first resistance group 31 , a second resistance group 32 and a third resistance group 33 . The first resistor group 31 includes one or multiple first resistor branches connected in parallel. Each of the first resistor branches includes a connected first resistor R31 and a first resistance switch S31. The second resistor The group 32 includes one or a plurality of second resistor branches connected in parallel, each of the second resistor branches includes a connected second resistor R32 and a second resistor switch S32, and the third resistor group 33 includes one or more second resistor branches connected in parallel. A plurality of third resistance branches are connected in parallel, and each third resistance branch includes a connected third resistor R33 and a third resistance switching switch S33.
其中，所述第一电阻支路的第一端与所述第二电阻支路的第一端相连接以作为所述可变电阻器的第一端，所述第一电阻支路的第二端与所述第三电阻支路的第一端相连接以作为所述可变电阻器的第二端，所述第二电阻支路的第二端和所述第三电阻支路的第二端均接地。Wherein, the first end of the first resistance branch is connected to the first end of the second resistance branch as the first end of the variable resistor, and the second end of the first resistance branch is The end is connected to the first end of the third resistance branch as the second end of the variable resistor, the second end of the second resistance branch and the second end of the third resistance branch Both terminals are grounded.
更具体地，当第一电阻组31有并联的多个第一电阻支路、第二电阻组32有并联的多个第二电阻支路以及第三电阻组33有并联的多个第三电阻支路时，多个第一电阻支路并联的第一端与多个第二电阻支路并联的第一端相连接，且该连接节点作为可变电阻器的第一端以与所述旁路输出开关SB2和所述放大输出开关SB1连接，多个第一电阻支路并联的第二端与多个第三电阻支路并联的第一端相连接，且该连接节点作为可变电阻器的第二端以与信号输出端RFout 连接。多个第二电阻支路并联的第二端和多个第三电阻支路并联的第二端均接地。More specifically, when the first resistor group 31 has a plurality of first resistor branches connected in parallel, the second resistor group 32 has a plurality of second resistor branches connected in parallel, and the third resistor group 33 has a plurality of third resistors connected in parallel. branch, the first end of the parallel connection of the plurality of first resistance branches is connected to the first end of the parallel connection of the plurality of second resistance branches, and the connection node serves as the first end of the variable resistor to communicate with the bypass The output switch SB2 is connected to the amplification output switch SB1, the second end of a plurality of first resistance branches in parallel is connected to the first end of a plurality of third resistance branches in parallel, and the connection node serves as a variable resistor. The second terminal is connected to the signal output terminal RFout connect. The second ends of the parallel connection of the plurality of second resistance branches and the second ends of the parallel connection of the plurality of third resistance branches are both grounded.
由此，通过控制各个电阻支路中的电阻切换开关的导通或关断，可以使得可变电阻器的阻值产生变化，进而可以得到不同的***损耗。Therefore, by controlling the on or off resistance switching switches in each resistance branch, the resistance value of the variable resistor can be changed, and thus different insertion losses can be obtained.
参阅图4，本发明实施例中，所述旁路匹配网络11包括第二可变电容器41、第四电容C42、第五电容C43、第六电容C44以及第二电感LP。Referring to FIG. 4 , in the embodiment of the present invention, the bypass matching network 11 includes a second variable capacitor 41 , a fourth capacitor C42 , a fifth capacitor C43 , a sixth capacitor C44 and a second inductor LP.
所述第二可变电容器41的第一端和所述第四电容C42的第一端相连接以作为所述旁路匹配网络11的输入端，与所述第一开关SA1的第二端连接，所述第四电容C42的第二端接地，所述第二可变电容器41的第二端与所述第五电容C43的第一端、所述第二电感LP的第一端相连接，所述第二电感LP的第二端接地，所述第五电容C43的第二端和所述第六电容C44的第一端相连接以作为所述旁路匹配网络11的输出端，与所述旁路输出开关SB2连接，所述第六电容C44的第二端接地。The first end of the second variable capacitor 41 is connected to the first end of the fourth capacitor C42 as the input end of the bypass matching network 11, and is connected to the second end of the first switch SA1. , the second end of the fourth capacitor C42 is connected to ground, the second end of the second variable capacitor 41 is connected to the first end of the fifth capacitor C43 and the first end of the second inductor LP, The second end of the second inductor LP is connected to ground, the second end of the fifth capacitor C43 and the first end of the sixth capacitor C44 are connected to serve as the output end of the bypass matching network 11, and the second end of the fifth capacitor C43 is connected to the ground. The bypass output switch SB2 is connected, and the second terminal of the sixth capacitor C44 is connected to ground.
进一步地，所述第二可变电容器41包括并联的多个第四电容支路，每个所述第四电容支路包括相连接的第七电容C41和第四电容切换开关S41。多个第四电容支路并联的第一端为所述第二可变电容器的第一端，多个第四电容支路并联的第二端为所述可变电容器的第二端，通过控制各个第四电容支路中的电容切换开关的导通或关断，可实现第二可变电容器41的容值变化。Further, the second variable capacitor 41 includes a plurality of fourth capacitor branches connected in parallel, and each of the fourth capacitor branches includes a connected seventh capacitor C41 and a fourth capacitor switch S41. The first end of a plurality of fourth capacitor branches connected in parallel is the first end of the second variable capacitor, and the second end of a plurality of fourth capacitor branches connected in parallel is the second end of the variable capacitor. By controlling The capacitance switching switch in each fourth capacitance branch is turned on or off, so that the capacitance value of the second variable capacitor 41 can be changed.
其中，所述共源级放大单元还包括第一偏置电阻R1和第二偏置电阻R2。所述第一偏置电阻R1的第一端与所述第一晶体管M1的栅极连接，所述第一偏置电阻R1的第二端连接第一偏置信号BIAS1；所述第二偏置电阻R2的第一端与所述第二晶体管M2的栅极连接，所述第二偏置电阻R2的第二端连接第二偏置信号BIAS2。Wherein, the common source stage amplification unit further includes a first bias resistor R1 and a second bias resistor R2. The first end of the first bias resistor R1 is connected to the gate of the first transistor M1, and the second end of the first bias resistor R1 is connected to the first bias signal BIAS1; the second bias The first end of the resistor R2 is connected to the gate of the second transistor M2, and the second end of the second bias resistor R2 is connected to the second bias signal BIAS2.
下面将结合具体的实施方式对本发明的多频段低噪声放大器的工作原理作进一步说明。The working principle of the multi-band low-noise amplifier of the present invention will be further described below with reference to specific implementation modes.
参阅图5，如图5所示，以三个信号输入端为例，三个信号输入端分别为RFin1～RFin3，相应地，第一电感和开关切换单元也有三个，三个第一电感分别为第一电感LG1～LG3，三个开关切换单元分别为开关切换单元S1～S3。此外，输出匹配网络的第一可变电容器中，第一电容组、第二电容组以及第三电容组 中的电容支路均以两个为例，即第一电容支路、第二电容支路以及第三电容支路均有两个，每个所述第一电容支路包括相连接的第一电容C21和第一电容切换开关S21，每个所述第二电容支路包括相连接的第二电容C22和第二电容切换开关S22，每个所述第三电容支路包括相连接的第三电容C23和第三电容切换开关S23。电阻衰减网络的可变电阻器中，第一电阻组、第二电阻组以及第三电阻组中的电阻支路均以一个为例，即第一电阻支路、第二电阻支路以及第三电阻支路均有一个，所述第一电阻支路包括相连接的第一电阻R31和第一电阻切换开关S31，所述第二电阻支路包括相连接的第二电阻R32和第二电阻切换开关S32，所述第三电阻支路包括相连接的第三电阻R33和第三电阻切换开关S33。旁路匹配网络中的第二可变电容器中，第四电容支路以三个为例。Refer to Figure 5. As shown in Figure 5, taking three signal input terminals as an example, the three signal input terminals are RFin1~RFin3 respectively. Correspondingly, there are also three first inductors and switch switching units. The three first inductors are respectively are the first inductors LG1 to LG3, and the three switch switching units are respectively the switch switching units S1 to S3. In addition, in the first variable capacitor of the output matching network, the first capacitor group, the second capacitor group and the third capacitor group Two capacitor branches are taken as an example, that is, there are two first capacitor branches, second capacitor branches and third capacitor branches. Each of the first capacitor branches includes a connected first capacitor branch. Capacitor C21 and first capacitor switch S21, each of the second capacitor branches includes a connected second capacitor C22 and a second capacitor switch S22, and each of the third capacitor branches includes a connected third capacitor switch. Capacitor C23 and the third capacitor switching switch S23. In the variable resistor of the resistance attenuation network, the resistance branches in the first resistance group, the second resistance group and the third resistance group are all taken as an example, that is, the first resistance branch, the second resistance branch and the third resistance branch. Each resistor branch has one, the first resistor branch includes a connected first resistor R31 and a first resistance switch S31, and the second resistor branch includes a connected second resistor R32 and a second resistor switch S31. Switch S32, the third resistance branch includes a connected third resistance R33 and a third resistance switching switch S33. Among the second variable capacitors in the bypass matching network, there are three fourth capacitor branches as an example.
继续参阅图5，第一电感LG1～LG3可作为用于对应不同频段的输入电感。三个第四电容支路共同组成可切变的电容，也即第二可变电容器，每个第四电容支路由第七电容C41和第四电容切换开关S41构成，第二可变电容器与第四电容C42、第二电感LP、第五电容C43、第六电容C44共同组成可切变的旁路匹配网络11。根据频段的不同，在旁路模式下，第一电感LGn与旁路匹配网络11共同作用可以使输入阻抗谐振在目标工作频段，避免回波损耗过大。在放大模式下，第一电感LGn、反馈电感LS、第一晶体管M1的栅源寄生电容以及隔直电容CB共同决定输入阻抗的谐振频率，输出谐振频率则由扼流电感LD与输出匹配网络12共同决定，通过调整输出匹配网络12中的电容切换开关即可使得输出谐振频率达到与输入谐振频率相同，此时低噪声放大器100的增益达到最高。S31、S32、S33、R31、R32、R33组成了两个***损耗不同档位的电阻衰减网络13，由此可以为放大后或者旁路输出的信号进行进一步地衰减或直通输出。Continuing to refer to FIG. 5 , the first inductors LG1 to LG3 can be used as input inductors corresponding to different frequency bands. The three fourth capacitor branches together form a switchable capacitor, that is, a second variable capacitor. Each fourth capacitor branch is composed of a seventh capacitor C41 and a fourth capacitor switch S41. The second variable capacitor and the fourth capacitor switch S41 are connected to each other. The four capacitors C42, the second inductor LP, the fifth capacitor C43, and the sixth capacitor C44 together form a switchable bypass matching network 11. Depending on the frequency band, in the bypass mode, the first inductor LGn and the bypass matching network 11 work together to make the input impedance resonate in the target operating frequency band to avoid excessive return loss. In the amplification mode, the first inductor LGn, the feedback inductor LS, the gate-source parasitic capacitance of the first transistor M1 and the DC blocking capacitor CB jointly determine the resonant frequency of the input impedance, and the output resonant frequency is determined by the choke inductor LD and the output matching network 12 It is jointly determined that by adjusting the capacitance switch in the output matching network 12, the output resonant frequency can be the same as the input resonant frequency, and at this time, the gain of the low-noise amplifier 100 reaches the highest level. S31, S32, S33, R31, R32, and R33 form two resistance attenuation networks 13 with different insertion loss levels, which can further attenuate or pass through the amplified or bypassed output signal.
如图5所示，通过开关切换单元可以选择其中一个信号输入端所输入的信号经过低噪声放大器的处理后进行输出，以选择信号输入端RFin1所输入的信号为例，与信号输入端RFin1对应的开关切换单元S1的第三开关SH断开，其他信号输入端对应的开关切换单元S2、S3的第三开关SH闭合，从而使得信号输入端RFin2和信号输入端RFin3接到地，由此可避免该两个信号输入端的信号对信号输入端RFin1的信号造成干扰。此外，开关切换单元S2和S3中的第 一开关SA1、第二开关SA2均为断开状态，以此阻断信号输入端RFin2、RFin3的信号进入电路。而通过控制开关切换单元S1中的第一开关SA1和第二开关SA2的导通或断开，则可以使得低噪声放大器100工作在旁路模式或放大模式，即可以控制信号从旁路匹配网络11直通输出或者从共源级放大单元放大后输出。例如，在放大模式下，开关切换单元S1中的第一开关SA1断开、第二开关SA2闭合，旁路输出开关SB2断开，放大输出开关SB1闭合，信号经过共源级放大单元放大后，通过输出匹配网络12输出至电阻衰减网络13，其中，可以通过控制第四开关S30的导通或断开来控制对放大后的信号是否进行衰减，当电阻衰减网络13的第四开关S30闭合时，此时放大后的信号未进行衰减而是直接传输至信号输出端RFout进行输出，当电阻衰减网络13的第四开关S30断开时，放大后的信号经过电阻衰减网络13的可变电阻器进一步衰减后经信号输出端RFout输出。As shown in Figure 5, through the switch switching unit, the signal input to one of the signal input terminals can be selected to be output after being processed by the low-noise amplifier. Taking the signal input to the signal input terminal RFin1 as an example, it corresponds to the signal input terminal RFin1. The third switch SH of the switch switching unit S1 is turned off, and the third switch SH of the switch switching units S2 and S3 corresponding to other signal input terminals is closed, so that the signal input terminal RFin2 and the signal input terminal RFin3 are connected to the ground, so that the signal input terminal RFin2 and the signal input terminal RFin3 can be connected to the ground. This prevents the signals from the two signal input terminals from interfering with the signal at the signal input terminal RFin1. In addition, the switching units S2 and S3 The first switch SA1 and the second switch SA2 are both in the off state, thereby blocking the signals from the signal input terminals RFin2 and RFin3 from entering the circuit. By controlling the on or off of the first switch SA1 and the second switch SA2 in the switch switching unit S1, the low noise amplifier 100 can be made to work in the bypass mode or the amplification mode, that is, the signal can be controlled to pass through the bypass matching network. 11 Direct output or amplified output from the common source stage amplification unit. For example, in the amplification mode, the first switch SA1 in the switch switching unit S1 is open, the second switch SA2 is closed, the bypass output switch SB2 is open, the amplification output switch SB1 is closed, and after the signal is amplified by the common source stage amplification unit, It is output to the resistance attenuation network 13 through the output matching network 12, wherein whether the amplified signal is attenuated can be controlled by controlling the on or off of the fourth switch S30. When the fourth switch S30 of the resistance attenuation network 13 is closed, , at this time, the amplified signal is not attenuated but is directly transmitted to the signal output terminal RFout for output. When the fourth switch S30 of the resistance attenuation network 13 is turned off, the amplified signal passes through the variable resistor of the resistance attenuation network 13 After further attenuation, it is output through the signal output terminal RFout.
其中，通过控制第一电阻切换开关S31、第二电阻切换开关S32以及第三电阻切换开关S33的导通或关闭，可以改变可变电阻器的电阻值，进而改变信号衰减的程度。例如，可以控制开关S31和S32导通，开关S33断开，或者可以控制开关S31和S33导通，开关S32断开，由此可得到两个档位的电阻值。Among them, by controlling the on or off of the first resistance switching switch S31, the second resistance switching switch S32 and the third resistance switching switch S33, the resistance value of the variable resistor can be changed, thereby changing the degree of signal attenuation. For example, the switches S31 and S32 can be controlled to be on and the switch S33 to be off, or the switches S31 and S33 can be controlled to be on and the switch S32 to be off, so that the resistance values of the two gears can be obtained.
可以理解的是，第一可变电容器和第二可变电容器中的电容支路的数量、可变电阻器中的电阻支路的数量均可以根据实际需要进行设置，对此不做具体限定。It can be understood that the number of capacitive branches in the first variable capacitor and the second variable capacitor and the number of resistive branches in the variable resistor can be set according to actual needs, and are not specifically limited.
本发明实施例还提供一种通信设备，包括上述任一实施例所描述的多频段低噪声放大器。An embodiment of the present invention also provides a communication device, including the multi-band low-noise amplifier described in any of the above embodiments.
本文中应用了具体个例对本发明的原理及实施方式进行了阐述，以上实施例的说明只是用于帮助理解本发明的方法及其核心思想；同时，对于本领域的技术人员，依据本发明的思想，在具体实施方式及应用范围上均会有改变之处，综上所述，本说明书内容不应理解为对本发明的限制。 This article uses specific examples to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method and the core idea of the present invention; at the same time, for those skilled in the art, based on the present invention Ideas, specific implementations, and application scopes may all be subject to change. In summary, the contents of this description should not be construed as limiting the present invention.

Claims (10)

  1. 一种多频段低噪声放大器，其特征在于，包括多个信号输入端、与所述多个信号输入端一一对应连接的多个第一电感、与所述多个第一电感一一对应连接的多个开关切换单元、旁路匹配网络、共源级放大单元、输出匹配网络、电阻衰减网络、旁路输出开关、放大输出开关以及信号输出端；A multi-band low-noise amplifier, characterized in that it includes a plurality of signal input terminals, a plurality of first inductors connected in a one-to-one correspondence with the plurality of signal input terminals, and a plurality of first inductors connected in a one-to-one correspondence. Multiple switch switching units, bypass matching networks, common source stage amplification units, output matching networks, resistance attenuation networks, bypass output switches, amplification output switches and signal output terminals;
    每个所述开关切换单元包括第一开关和第二开关，所述共源级放大单元包括第一晶体管、第二晶体管、隔直电容、稳压电容、扼流电感以及反馈电感；Each of the switch switching units includes a first switch and a second switch, and the common source stage amplification unit includes a first transistor, a second transistor, a DC blocking capacitor, a voltage stabilizing capacitor, a choke inductor and a feedback inductor;
    其中，每个所述第一电感的第一端连接至对应的信号输入端，每个所述开关切换单元的第一开关的第一端和第二开关的第一端均连接至对应的第一电感的第二端，所述第一开关的第二端连接至所述旁路匹配网络的输入端，所述第二开关的第二端连接至所述隔直电容的第一端，所述隔直电容的第二端连接至所述第一晶体管的栅极，所述第一晶体管的源极通过所述反馈电感接地，所述第一晶体管的漏极连接至所述第二晶体管的源极，所述第二晶体管的栅极通过所述稳压电容接地，所述第二晶体管的漏极通过所述扼流电感连接供电电压VDD，所述输出匹配网络的输入端连接至所述第二晶体管的漏极，所述输出匹配网络的输出端通过所述放大输出开关与所述电阻衰减网络的输入端连接，所述旁路匹配网络的输出端通过所述旁路输出开关与所述电阻衰减网络的输入端连接，所述电阻衰减网络的输出端连接至所述信号输出端。Wherein, the first end of each first inductor is connected to the corresponding signal input end, and the first end of the first switch and the first end of the second switch of each switch switching unit are connected to the corresponding third The second end of an inductor, the second end of the first switch is connected to the input end of the bypass matching network, the second end of the second switch is connected to the first end of the DC blocking capacitor, so The second end of the DC blocking capacitor is connected to the gate of the first transistor, the source of the first transistor is grounded through the feedback inductor, and the drain of the first transistor is connected to the second transistor. The source electrode, the gate electrode of the second transistor is connected to the ground through the voltage stabilizing capacitor, the drain electrode of the second transistor is connected to the supply voltage VDD through the choke inductor, and the input end of the output matching network is connected to the The drain of the second transistor, the output end of the output matching network is connected to the input end of the resistance attenuation network through the amplification output switch, and the output end of the bypass matching network is connected to the bypass output switch through the bypass output switch. The input end of the resistance attenuation network is connected, and the output end of the resistance attenuation network is connected to the signal output end.
  2. 根据权利要求1所述的多频段低噪声放大器，其特征在于，每个所述开关切换单元还包括第三开关，每个所述第三开关的第一端连接至对应的第一电感的第二端，每个所述第三开关的第二端接地。The multi-band low-noise amplifier according to claim 1, wherein each of the switch switching units further includes a third switch, and the first end of each of the third switches is connected to the corresponding first end of the first inductor. Two terminals, the second terminal of each said third switch is connected to ground.
  3. 根据权利要求1所述的多频段低噪声放大器，其特征在于，所述输出匹配网络包括第一可变电容器；The multi-band low-noise amplifier according to claim 1, wherein the output matching network includes a first variable capacitor;
    所述第一可变电容器的第一端为所述输出匹配网络的输入端，与所述第二晶体管的漏极连接，所述第一可变电容器的第二端为所述输出匹配网络的输出端，与所述放大输出开关连接。The first end of the first variable capacitor is the input end of the output matching network and is connected to the drain of the second transistor. The second end of the first variable capacitor is the input end of the output matching network. The output terminal is connected to the amplification output switch.
  4. 根据权利要求3所述的多频段低噪声放大器，其特征在于，所述第一可变电容器包括第一电容组、第二电容组以及第三电容组；The multi-band low-noise amplifier according to claim 3, wherein the first variable capacitor includes a first capacitor group, a second capacitor group and a third capacitor group;
    所述第一电容组包括一个或并联的多个第一电容支路，每个所述第一电容 支路包括相连接的第一电容和第一电容切换开关，所述第二电容组包括一个或并联的多个第二电容支路，每个所述第二电容支路包括相连接的第二电容和第二电容切换开关，所述第三电容组包括一个或并联的多个第三电容支路，每个所述第三电容支路包括相连接的第三电容和第三电容切换开关；The first capacitor group includes one or multiple first capacitor branches connected in parallel, each of the first capacitors The branch includes a connected first capacitor and a first capacitor switching switch. The second capacitor group includes one or a plurality of second capacitor branches connected in parallel. Each of the second capacitor branches includes a connected second capacitor branch. capacitor and a second capacitor switch, the third capacitor group includes one or a plurality of third capacitor branches connected in parallel, and each of the third capacitor branches includes a connected third capacitor and a third capacitor switch;
    其中，所述第一电容支路的第一端与所述第二电容支路的第一端相连接以作为所述第一可变电容器的第一端，所述第一电容支路的第二端与所述第三电容支路的第一端相连接以作为所述第一可变电容器的第二端，所述第二电容支路的第二端和所述第三电容支路的第二端均接地。Wherein, the first end of the first capacitor branch is connected to the first end of the second capacitor branch as the first end of the first variable capacitor, and the first end of the first capacitor branch is Two ends are connected to the first end of the third capacitor branch to serve as the second end of the first variable capacitor, and the second end of the second capacitor branch and the third end of the third capacitor branch are The second end is both grounded.
  5. 根据权利要求1所述的多频段低噪声放大器，其特征在于，所述电阻衰减网络包括第四开关和可变电阻器；The multi-band low-noise amplifier according to claim 1, wherein the resistance attenuation network includes a fourth switch and a variable resistor;
    所述第四开关的第一端和所述可变电阻器的第一端相连接以作为所述电阻衰减网络的输入端，与所述旁路输出开关和所述放大输出开关连接，所述第四开关的第二端和所述可变电阻器的第二端相连接以作为所述电阻衰减网络的输出端，与所述信号输出端连接。The first end of the fourth switch is connected to the first end of the variable resistor to serve as the input end of the resistance attenuation network and is connected to the bypass output switch and the amplification output switch. The second end of the fourth switch is connected to the second end of the variable resistor to serve as the output end of the resistance attenuation network and is connected to the signal output end.
  6. 根据权利要求5所述的多频段低噪声放大器，其特征在于，所述可变电阻器包括第一电阻组、第二电阻组以及第三电阻组；The multi-band low-noise amplifier according to claim 5, wherein the variable resistor includes a first resistor group, a second resistor group and a third resistor group;
    所述第一电阻组包括一个或并联的多个第一电阻支路，每个所述第一电阻支路包括相连接的第一电阻和第一电阻切换开关，所述第二电阻组包括一个或并联的多个第二电阻支路，每个所述第二电阻支路包括相连接的第二电阻和第二电阻切换开关，所述第三电阻组包括一个或并联的多个第三电阻支路，每个所述第三电阻支路包括相连接的第三电阻和第三电阻切换开关；The first resistance group includes one or a plurality of first resistance branches connected in parallel, each of the first resistance branches includes a connected first resistor and a first resistance switch, and the second resistance group includes a or a plurality of second resistor branches connected in parallel, each of the second resistor branches includes a connected second resistor and a second resistance switch, and the third resistor group includes one or a plurality of third resistors connected in parallel. branches, each of the third resistance branches includes a connected third resistor and a third resistance switch;
    其中，所述第一电阻支路的第一端与所述第二电阻支路的第一端相连接以作为所述可变电阻器的第一端，所述第一电阻支路的第二端与所述第三电阻支路的第一端相连接以作为所述可变电阻器的第二端，所述第二电阻支路的第二端和所述第三电阻支路的第二端均接地。Wherein, the first end of the first resistance branch is connected to the first end of the second resistance branch as the first end of the variable resistor, and the second end of the first resistance branch is The end is connected to the first end of the third resistance branch as the second end of the variable resistor, the second end of the second resistance branch and the second end of the third resistance branch Both terminals are grounded.
  7. 根据权利要求1所述的多频段低噪声放大器，其特征在于，所述旁路匹配网络包括第二可变电容器、第四电容、第五电容、第六电容以及第二电感；The multi-band low-noise amplifier according to claim 1, wherein the bypass matching network includes a second variable capacitor, a fourth capacitor, a fifth capacitor, a sixth capacitor and a second inductor;
    所述第二可变电容器的第一端和所述第四电容的第一端相连接以作为所述旁路匹配网络的输入端，与所述第一开关的第二端连接，所述第四电容的第二 端接地，所述第二可变电容器的第二端与所述第五电容的第一端、所述第二电感的第一端相连接，所述第二电感的第二端接地，所述第五电容的第二端和所述第六电容的第一端相连接以作为所述旁路匹配网络的输出端，与所述旁路输出开关连接，所述第六电容的第二端接地。The first end of the second variable capacitor is connected to the first end of the fourth capacitor to serve as the input end of the bypass matching network and is connected to the second end of the first switch. The second of four capacitors The second end of the second variable capacitor is connected to the ground, the second end of the second variable capacitor is connected to the first end of the fifth capacitor and the first end of the second inductor, the second end of the second inductor is connected to ground, and the second end of the second variable capacitor is connected to the ground. The second end of the fifth capacitor is connected to the first end of the sixth capacitor to serve as the output end of the bypass matching network and is connected to the bypass output switch. The second end of the sixth capacitor is connected to ground. .
  8. 根据权利要求7所述的多频段低噪声放大器，其特征在于，所述第二可变电容器包括并联的多个第四电容支路，每个所述第四电容支路包括相连接的第七电容和第四电容切换开关。The multi-band low-noise amplifier according to claim 7, wherein the second variable capacitor includes a plurality of fourth capacitor branches connected in parallel, and each of the fourth capacitor branches includes a connected seventh capacitor branch. capacitor and the fourth capacitor switch.
  9. 根据权利要求1所述的多频段低噪声放大器，其特征在于，所述共源级放大单元还包括第一偏置电阻和第二偏置电阻；The multi-band low-noise amplifier according to claim 1, wherein the common source stage amplification unit further includes a first bias resistor and a second bias resistor;
    所述第一偏置电阻的第一端与所述第一晶体管的栅极连接，所述第一偏置电阻的第二端连接第一偏置信号；所述第二偏置电阻的第一端与所述第二晶体管的栅极连接，所述第二偏置电阻的第二端连接第二偏置信号。The first end of the first bias resistor is connected to the gate of the first transistor, the second end of the first bias resistor is connected to the first bias signal; the first end of the second bias resistor is connected to the gate of the first transistor. The second end of the second bias resistor is connected to the gate of the second transistor, and the second end of the second bias resistor is connected to the second bias signal.
  10. 一种通信设备，其特征在于，包括权利要求1-9任一项所述的多频段低噪声放大器。 A communication device, characterized by comprising the multi-band low-noise amplifier according to any one of claims 1-9.
PCT/CN2023/109902 2022-09-16 2023-07-28 Multi-band low-noise amplifier and communication device WO2024055761A1 (en)

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