CN115208338A - Multi-band low noise amplifier and communication equipment - Google Patents
Multi-band low noise amplifier and communication equipment Download PDFInfo
- Publication number
- CN115208338A CN115208338A CN202211125968.8A CN202211125968A CN115208338A CN 115208338 A CN115208338 A CN 115208338A CN 202211125968 A CN202211125968 A CN 202211125968A CN 115208338 A CN115208338 A CN 115208338A
- Authority
- CN
- China
- Prior art keywords
- capacitor
- switch
- resistor
- output
- capacitance
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000004891 communication Methods 0.000 title claims abstract description 11
- 230000003321 amplification Effects 0.000 claims abstract description 30
- 238000003199 nucleic acid amplification method Methods 0.000 claims abstract description 30
- 239000003990 capacitor Substances 0.000 claims description 147
- 230000000903 blocking effect Effects 0.000 claims description 11
- 230000000087 stabilizing effect Effects 0.000 claims description 6
- 238000013016 damping Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 5
- 230000002238 attenuated effect Effects 0.000 description 3
- 238000003780 insertion Methods 0.000 description 3
- 230000037431 insertion Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 230000003071 parasitic effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000012905 input function Methods 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
Images
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
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Amplifiers (AREA)
Abstract
The embodiment of the invention discloses a multi-band low-noise amplifier and communication equipment, wherein a plurality of switch switching units are arranged in the low-noise amplifier and are respectively connected with a plurality of signal input ends in a one-to-one correspondence manner, each switch switching unit comprises a first switch and a second switch, and the first switch and the second switch are respectively connected to a bypass matching network and a common-source amplification unit, so that signals can be output from the bypass matching network or output after being amplified by the common-source amplification unit by controlling the connection and disconnection of the first switch and the second switch, a plurality of signal input ends can be used for inputting signals of a plurality of different frequency bands, and the switching of different signal input ends can be realized by the plurality of switch switching units, therefore, the multi-input multi-band function can be realized by the scheme, and the plurality of signal input ends share one common-source amplification unit, the occupied area can be greatly reduced, and the miniaturization of a chip is facilitated.
Description
Technical Field
The invention relates to the technical field of electronics, in particular to a multi-band low-noise amplifier and communication equipment.
Background
With the development of communication technology, the requirement that a single radio frequency transceiver is compatible with as many communication bands as possible is greatly increased, so that a radio frequency receiver compatible with multiple frequency bands becomes a research hotspot in the communication field. In order to implement a multi-band function, the existing radio frequency receiver is generally implemented by using a plurality of individual low noise amplifiers, that is, the individual low noise amplifiers are connected in parallel, the individual low noise amplifiers respectively operate in different frequency bands, and then the low noise amplifier of a desired frequency band is selected through a switch. However, in the above method, since a plurality of parallel low noise amplifiers need to be arranged, the area occupied by the low noise amplifiers is greatly increased, which is not favorable for chip miniaturization.
Disclosure of Invention
The embodiment of the invention provides a multi-band low-noise amplifier and communication equipment, which can realize the multi-band low-noise amplification function, reduce the occupied area of the low-noise amplifier and facilitate the improvement of the miniaturization of a chip.
In order to solve the above technical problem, in a first aspect, the present invention provides a multiband low noise amplifier, including a plurality of signal input terminals, a plurality of first inductors correspondingly connected to the plurality of signal input terminals one to one, a plurality of switch switching units correspondingly connected to the plurality of first inductors one to one, a bypass matching network, a common-source stage amplifying unit, an output matching network, a resistance attenuation network, a bypass output switch, an amplifying output switch, and a signal output terminal;
each switch switching unit comprises a first switch and a second switch, and the common source amplification unit comprises a first transistor, a second transistor, a blocking capacitor, a voltage stabilizing capacitor, a choke inductor and a feedback inductor;
wherein a first end of each first inductor is connected to a corresponding signal input end, a first end of a first switch and a first end of a second switch of each switch switching unit are both connected to a second end of the corresponding first inductor, a second end of the first switch is connected to an input end of the bypass matching network, a second end of the second switch is connected to a first end of the dc blocking capacitor, a second end of the dc blocking capacitor is connected to a gate of the first transistor, a source of the first transistor is grounded through the feedback inductor, a drain of the first transistor is connected to a source of the second transistor, a gate of the second transistor is grounded through the voltage stabilizing capacitor, a drain of the second transistor is connected to a supply voltage VDD through the inductor choke, an input end of the output matching network is connected to a drain of the second transistor, an output end of the output matching network is connected to an input end of the resistance attenuation network through the amplification output switch, an output end of the bypass matching network is connected to an input end of the resistance attenuation network through the bypass output switch, and an output end of the resistance attenuation network is connected to the signal output end.
Further, each of the switch switching units further includes a third switch, a first end of each of the third switches is connected to the second end of the corresponding first inductor, and a second end of each of the third switches is grounded.
Further, 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 with the drain electrode of the second transistor, and the second end of the first variable capacitor is the output end of the output matching network and is connected with the amplification output switch.
Further, the first variable capacitor includes a first capacitance group, a second capacitance group, and a third capacitance group;
the first capacitor bank comprises one or a plurality of first capacitor branches connected in parallel, each first capacitor branch comprises a first capacitor and a first capacitor change-over switch which are connected, the second capacitor bank comprises one or a plurality of second capacitor branches connected in parallel, each second capacitor branch comprises a second capacitor and a second capacitor change-over switch which are connected, the third capacitor bank comprises one or a plurality of third capacitor branches connected in parallel, and each third capacitor branch comprises a third capacitor and a third capacitor change-over switch which are connected;
the first end of the first capacitance branch circuit is connected with the first end of the second capacitance branch circuit to serve as the first end of the first variable capacitor, the second end of the first capacitance branch circuit is connected with the first end of the third capacitance branch circuit to serve as the second end of the first variable capacitor, and the second end of the second capacitance branch circuit and the second end of the third capacitance branch circuit are both grounded.
Further, the resistance attenuation network includes a fourth switch and a variable resistor;
the first end of the fourth switch and the first end of the variable resistor are connected to serve as the input end of the resistance attenuation network, the fourth switch is connected with the bypass output switch and the amplification output switch, and the second end of the fourth switch and the second end of the variable resistor are connected to serve as the output end of the resistance attenuation network and connected with the signal output end.
Further, the variable resistor includes a first resistor group, a second resistor group, and a third resistor group;
the first resistor group comprises one or a plurality of first resistor branches connected in parallel, each first resistor branch comprises a first resistor and a first resistor change-over switch which are connected, the second resistor group comprises one or a plurality of second resistor branches connected in parallel, each second resistor branch comprises a second resistor and a second resistor change-over switch which are connected, the third resistor group comprises one or a plurality of third resistor branches connected in parallel, and each third resistor branch comprises a third resistor and a third resistor change-over switch which are connected;
the first end of the first resistance branch is connected with the first end of the second resistance branch to serve as the first end of the variable resistor, the second end of the first resistance branch is connected with the first end of the third resistance branch to serve as the second end of the variable resistor, and the second end of the second resistance branch and the second end of the third resistance branch are both grounded.
Further, the bypass matching network comprises 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 and the first end of the fourth capacitor are connected to serve as the input end of the bypass matching network and connected to the second end of the first switch, the second end of the fourth capacitor is grounded, 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 grounded, the second end of the fifth capacitor and the first end of the sixth capacitor are connected to serve as the output end of the bypass matching network and connected to the bypass output switch, and the second end of the sixth capacitor is grounded.
Further, the second variable capacitor includes a plurality of fourth capacitive branches connected in parallel, and each of the fourth capacitive branches includes a seventh capacitance and a fourth capacitance changeover switch connected to each other.
Further, the common-source stage amplifying unit further comprises a first bias resistor and a second bias resistor;
a first end of the first bias resistor is connected with a grid electrode of the first transistor, and a second end of the first bias resistor is connected with a first bias signal; the first end of the second bias resistor is connected with the grid electrode of the second transistor, and the second end of the second bias resistor is connected with a second bias signal.
In a second aspect, the invention also provides a communication device comprising a multiband low noise amplifier as described in any of the above.
Has the advantages that: in the multi-band low noise amplifier, a plurality of switch switching units are arranged and respectively connected with a plurality of signal input ends in a one-to-one correspondence manner, wherein each switch switching unit comprises a first switch and a second switch, the first switch and the second switch are respectively connected to a bypass matching network and a common source stage amplifying unit, so that signals can be output from the bypass matching network or output after being amplified by the common source stage amplifying unit by controlling the connection and disconnection of the first switch and the second switch, a plurality of signals of different frequency bands can be input by arranging the plurality of signal input ends, and the switching of different signal input ends can be realized by the plurality of switch switching units.
Drawings
The technical solution and the advantages of the present invention will be apparent from the following detailed description of the embodiments of the present invention with reference to the accompanying drawings.
FIG. 1 is a schematic structural diagram of a multiband low noise amplifier provided by an embodiment of the present invention;
FIG. 2 is a detailed circuit diagram of an output matching network provided by an embodiment of the invention;
FIG. 3 is a specific circuit diagram of a resistance attenuation network provided by an embodiment of the present invention;
FIG. 4 is a detailed circuit diagram of a bypass matching network provided by an embodiment of the present invention;
FIG. 5 is a specific circuit diagram of the multiband low noise amplifier according to the embodiment of the present invention.
Detailed Description
Referring to the drawings, wherein like reference numbers refer to like elements, the principles of the present invention are illustrated as being implemented in a suitable computing environment. The following description is based on illustrated embodiments of the invention and should not be taken as limiting the invention with regard to other embodiments that are not detailed herein.
Referring to fig. 1, the multiband low noise amplifier 100 according to the embodiment of the present invention includes a plurality of signal input terminals RFin1 to RFinn, a plurality of first inductors LG1 to LGn connected to the plurality of signal input terminals RFin1 to RFinn in a one-to-one correspondence manner, a plurality of switch switching units S1 to Sn connected to the plurality of first inductors LG1 to LGn in a one-to-one correspondence manner, a bypass matching network 11, a common source amplifier unit, an output matching network 12, a resistance attenuation network 13, a bypass output switch SB2, an amplification output switch SB1, and a signal output terminal RFout.
Each switch switching unit Sn comprises a first switch SA1 and a second switch SA2, and the common-source amplification unit comprises a first transistor M1, a second transistor M2, a blocking capacitor CB, a voltage stabilizing capacitor CCG, a choke inductor LD, and a feedback inductor LS.
Wherein a first terminal of each first inductor LGn is connected to a corresponding signal input terminal RFinn, a first terminal of a first switch SA1 and a first terminal of a second switch SA2 in each switch switching unit Sn are both connected to a second terminal of the corresponding first inductor LGn, a second terminal of the first switch SA1 is connected to an input terminal of the bypass matching network 11, a second terminal of the second switch SA2 is connected to a first terminal of the dc blocking capacitor CB, a second terminal of the dc blocking capacitor CB is connected to the gate of the first transistor M1, the source of the first transistor M1 is connected to the ground through the feedback inductor LS, the drain of the first transistor M1 is connected to the source of the second transistor M2, 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 inductor LD, an input terminal of the output matching network 12 is connected to the drain of the second transistor M2, an output terminal of the output matching network 12 is connected to the output terminal of the bypass matching network 13 through the amplifying output switch SB1 and the resistor SB 13, and an output terminal of the bypass matching network 13 is connected to an output terminal of the bypass matching network 13.
The input signal of each signal input end generates resonance with the gate-source parasitic capacitor of the first transistor M1 through the corresponding first inductor, and the direct current bias and the radio frequency signal are separated by the blocking capacitor CB. 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 of the plurality of signal input terminals RFin1 to RFinn to provide matching of input impedance, and inductance values of the first inductors may be different from each other, and in practical applications, inductance values of the first inductors may be set according to frequency bands of different input signals, so that the input impedance of the entire low noise amplifier 100 may operate in multiple frequency bands.
By controlling the on/off of the first switch SA1 and the second switch SA2, the low noise amplifier 100 of this embodiment can enable a signal to be output from the bypass matching network 11 or output after being amplified by the common-source amplification unit, and can input a plurality of signals of different frequency bands by setting a plurality of signal input terminals RFin1 to RFinn, and can implement the switching of different signal input terminals by a plurality of switch switching units S1 to Sn, for example, when a signal is required to be input to one of the 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 in the switch switching unit connected to the other signal input terminals are both turned off, so that the low noise amplifier 100 can receive a signal input to one signal input terminal and perform bypass output or amplification output, therefore, the present solution can implement a multi-input function, and a plurality of signal input terminals share one-stage amplification unit, which can greatly reduce the area occupied by common-source amplification unit, and is beneficial to chip miniaturization.
In the bypass mode, signals of different frequency bands are input to the bypass matching network 11, then are resonated, and are directly output to the resistance attenuation network 13, so that different bypass insertion losses can be obtained.
Further, in the low noise amplifier 100 according to the embodiment of the present invention, each of the switch switching units Sn further includes a third switch SH, a first end of each of the third switches SH is connected to a second end of the corresponding first inductor LGn, and a second end of each of the third switches SH is grounded. When a signal input by one of the signal input terminals needs to be accessed, for example, a signal input by the signal input terminal RFin1 needs to be accessed, the third switch SH in the switch switching unit S1 is turned off, and the third switches SH in the other switch switching units S2 to Sn are turned on, so that the other signal input terminals RFin2 to RFinn are grounded through the corresponding third switches, and signal interference of the other signal input terminals RFin2 to RFinn can be further avoided.
In an embodiment of the present invention, the output matching network 12 includes a first variable capacitor, a first end of the first variable capacitor is an input end of the output matching network 12 and is connected to the drain of the second transistor M2, and a second end of the first variable capacitor is an output end of the output matching network 12 and is connected to the amplified output switch SB 1. By providing 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 the input signal of different frequency bands.
Further, referring to fig. 2, the first variable capacitor includes a first capacitance group 21, a second capacitance group 22, and a third capacitance group 23.
The first capacitor bank 21 includes one or a plurality of first capacitor branches connected in parallel, each of the first capacitor branches includes a first capacitor C21 and a first capacitor switch S21 connected to each other, the second capacitor bank 22 includes one or a plurality of second capacitor branches connected in parallel, each of the second capacitor branches includes a second capacitor C22 and a second capacitor switch S22 connected to each other, the third capacitor bank 23 includes one or a plurality of third capacitor branches connected in parallel, and each of the third capacitor branches includes a third capacitor C23 and a third capacitor switch S23 connected to each other. The first end of the first capacitance branch is connected with the first end of the second capacitance branch to serve as the first end of the first variable capacitor, the second end of the first capacitance branch is connected with the first end of the third capacitance branch to serve as the second end of the first variable capacitor, and the second end of the second capacitance branch and the second end of the third capacitance branch are both grounded.
More specifically, when the first capacitor bank 21 has a plurality of first capacitor branches connected in parallel, the second capacitor bank 22 has a plurality of second capacitor branches connected in parallel, and the third capacitor bank 23 has a plurality of third capacitor branches connected in parallel, first ends of the plurality of first capacitor branches connected in parallel are connected to first ends of the plurality of second capacitor branches connected in parallel, and the connection node serves as a first end of the first variable capacitor to be connected to the drain of the second transistor M2, second ends of the plurality of first capacitor branches connected in parallel are connected to first ends of the plurality of third capacitor branches connected in parallel, and the connection node serves as a second end of the first variable capacitor to be connected to the amplified output switch SB 1. The second ends of the plurality of second capacitor branches connected in parallel and the second ends of the plurality of third capacitor branches connected in parallel are both grounded.
Therefore, by controlling the on/off of the capacitance selector switch in each capacitance branch, the capacitance value of the first variable capacitor can be changed, and the output impedance of the output matching network 12 can be changed. Thus, the output impedance of the output matching network 12 can be adjusted according to the desired operating frequency band.
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. A first end of the fourth switch S30 and a first end of the variable resistor are connected to serve as an input end of the resistance attenuation network 13, and are connected to the bypass output switch SB2 and the amplification output switch SB1, and a second end of the fourth switch S30 and a second end of the variable resistor are connected to serve as an output end of the resistance attenuation network 13, and are connected to the signal output end RFout.
Further, the variable resistor includes a first resistor group 31, a second resistor group 32, and a third resistor group 33. The first resistor group 31 includes one or a plurality of first resistor branches connected in parallel, each of the first resistor branches includes a first resistor R31 and a first resistor switch S31 connected to each other, the second resistor group 32 includes one or a plurality of second resistor branches connected in parallel, each of the second resistor branches includes a second resistor R32 and a second resistor switch S32 connected to each other, the third resistor group 33 includes one or a plurality of third resistor branches connected in parallel, and each of the third resistor branches includes a third resistor R33 and a third resistor switch S33 connected to each other.
The first end of the first resistance branch is connected with the first end of the second resistance branch to serve as the first end of the variable resistor, the second end of the first resistance branch is connected with the first end of the third resistance branch to serve as the second end of the variable resistor, and the second end of the second resistance branch and the second end of the third resistance branch are both grounded.
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 resistor branches connected in parallel, first ends of the plurality of first resistor branches connected in parallel are connected to first ends of the plurality of second resistor branches connected in parallel, and the connection node serves as a first end of the variable resistor to be connected to the bypass output switch SB2 and the amplification output switch SB1, second ends of the plurality of first resistor branches connected in parallel are connected to first ends of the plurality of third resistor branches connected in parallel, and the connection node serves as a second end of the variable resistor to be connected to the signal output terminal RFout. The second ends of the plurality of second resistance branches connected in parallel and the second ends of the plurality of third resistance branches connected in parallel are both grounded.
Therefore, the resistance value of the variable resistor can be changed by controlling the on or off of the resistance change-over switches in the resistance branches, and different insertion losses can be obtained.
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.
A first end of the second variable capacitor 41 and a first end of the fourth capacitor C42 are connected to serve as an input end of the bypass matching network 11, and are connected to a second end of the first switch SA1, a second end of the fourth capacitor C42 is grounded, a second end of the second variable capacitor 41 is connected to a first end of the fifth capacitor C43 and a first end of the second inductor LP, a second end of the second inductor LP is grounded, a second end of the fifth capacitor C43 and a first end of the sixth capacitor C44 are connected to serve as an output end of the bypass matching network 11, and are connected to the bypass output switch SB2, and a second end of the sixth capacitor C44 is grounded.
Further, the second variable capacitor 41 includes a plurality of fourth capacitive branches connected in parallel, and each of the fourth capacitive branches includes a seventh capacitance C41 and a fourth capacitance switching switch S41 connected together. The first ends of the plurality of fourth capacitance branches connected in parallel are first ends of the second variable capacitors, and the second ends of the plurality of fourth capacitance branches connected in parallel are second ends of the variable capacitors, and the capacitance value change of the second variable capacitor 41 can be realized by controlling the on or off of the capacitance change-over switches in the fourth capacitance branches.
The common-source amplification unit further comprises a first bias resistor R1 and a second bias resistor R2. A first end of the first BIAS resistor R1 is connected to the gate of the first transistor M1, and a second end of the first BIAS resistor R1 is connected to a first BIAS signal BIAS1; a first end of the second BIAS resistor R2 is connected to the gate of the second transistor M2, and a second end of the second BIAS resistor R2 is connected to a second BIAS signal BIAS2.
The operation of the multi-band low noise amplifier of the present invention will be further described with reference to the following embodiments.
Referring to fig. 5, as shown in fig. 5, three signal input terminals RFin1 to RFin3 are taken as an example, and accordingly, there are three first inductors LG1 to LG3 and three switch switching units S1 to S3 respectively. In addition, in the first variable capacitor of the output matching network, two capacitance branches in the first capacitance group, the second capacitance group and the third capacitance group are taken as an example, that is, there are two capacitance branches in the first capacitance branch, the second capacitance branch and the third capacitance branch, each first capacitance branch includes a first capacitance C21 and a first capacitance change-over switch S21 connected to each other, each second capacitance branch includes a second capacitance C22 and a second capacitance change-over switch S22 connected to each other, and each third capacitance branch includes a third capacitance C23 and a third capacitance change-over switch S23 connected to each other. In the variable resistor of the resistance attenuation network, one resistor branch is taken as an example in each of a first resistor group, a second resistor group and a third resistor group, that is, there is one resistor branch in each of the first resistor group, the second resistor group and the third resistor group, the first resistor branch includes a first resistor R31 and a first resistor switch S31 which are connected, the second resistor branch includes a second resistor R32 and a second resistor switch S32 which are connected, and the third resistor branch includes a third resistor R33 and a third resistor switch S33 which are connected. In the second variable capacitor in the bypass matching network, three fourth capacitance branches are taken as an example.
With reference to fig. 5, the first inductors LG 1-LG 3 can be used as input inductors corresponding to different frequency bands. The three fourth capacitance branches jointly form a switchable capacitance, that is, a second variable capacitor, each fourth capacitance branch is formed by a seventh capacitance C41 and a fourth capacitance switch S41, and the second variable capacitor, the fourth capacitance C42, the second inductance LP, the fifth capacitance C43, and the sixth capacitance C44 jointly form a switchable bypass matching network 11. According to the difference of frequency bands, in the bypass mode, the first inductor LGn and the bypass matching network 11 work together to enable the input impedance to resonate in the target working frequency band, so as to avoid the overlarge return loss. In the amplification mode, the first inductor LGn, the feedback inductor LS, the gate-source parasitic capacitor of the first transistor M1, and the blocking capacitor CB jointly determine the resonant frequency of the input impedance, the output resonant frequency is determined by the choke inductor LD and the output matching network 12, the output resonant frequency can be the same as the input resonant frequency by adjusting the capacitor switch in the output matching network 12, and the gain of the low noise amplifier 100 is the highest at this time. S31, S32, S33, R31, R32, R33 form two resistive attenuation networks 13 with different insertion loss steps, so that the amplified or bypassed signal can be further attenuated or output directly.
As shown in fig. 5, the signal input by one of the signal input terminals can be selected by the switch switching unit to be output after being processed by the low noise amplifier, taking the signal input by the selected signal input terminal RFin1 as an example, the third switch SH of the switch switching unit S1 corresponding to the signal input terminal RFin1 is turned off, and the third switches SH of the switch switching units S2 and S3 corresponding to the other signal input terminals are turned on, so that the signal input terminal RFin2 and the signal input terminal RFin3 are connected to ground, and thus, the signals of the two signal input terminals can be prevented from interfering with the signal of the signal input terminal RFin 1. In addition, the first switch SA1 and the second switch SA2 in the switch switching units S2 and S3 are both in an off state, so as to block signals of the signal input terminals RFin2 and RFin3 from entering the circuit. By controlling the on/off of the first switch SA1 and the second switch SA2 in the switch switching unit S1, the low noise amplifier 100 can operate in a bypass mode or an amplification mode, that is, the signal can be directly output from the bypass matching network 11 or output after being amplified by the common source stage amplification unit. For example, in the amplification mode, the first switch SA1 in the switch switching unit S1 is opened, the second switch SA2 is closed, the bypass output switch SB2 is opened, the amplification output switch SB1 is closed, and the signal is amplified by the common-source amplification unit and then output to the resistance attenuation network 13 through the output matching network 12, wherein whether attenuation is performed on the amplified signal can be controlled by controlling on or off of the fourth switch S30, when the fourth switch S30 of the resistance attenuation network 13 is closed, the amplified signal is not attenuated but directly transmitted to the signal output terminal RFout for output, and when the fourth switch S30 of the resistance attenuation network 13 is opened, the amplified signal is further attenuated by the variable resistor of the resistance attenuation network 13 and then output through the signal output terminal RFout.
By controlling the on/off of the first resistance switch S31, the second resistance switch S32, and the third resistance switch S33, the resistance value of the variable resistor can be changed, and the degree of signal attenuation can be changed. For example, the switches S31 and S32 may be controlled to be on and the switch S33 may be controlled to be off, or the switches S31 and S33 may be controlled to be on and the switch S32 may be controlled to be off, whereby the resistance values of two shift positions may be obtained.
It is to be understood that the number of the capacitive branches in the first variable capacitor and the second variable capacitor and the number of the resistive branches in the variable resistor may be set according to actual needs, which is not particularly limited.
An embodiment of the present invention further provides a communication device, including the multiband low noise amplifier described in any of the above embodiments.
The principle and the embodiment of the present invention are explained by applying specific examples, and the above description of the embodiments is only used to help understanding the method and the core idea of the present invention; meanwhile, for those skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
Claims (10)
1. A multi-band low noise amplifier is characterized by comprising a plurality of signal input ends, a plurality of first inductors, a plurality of switch switching units, a bypass matching network, a common source amplification unit, an output matching network, a resistance attenuation network, a bypass output switch, an amplification output switch and a signal output end, wherein the plurality of first inductors are connected with the plurality of signal input ends in a one-to-one correspondence manner;
each switch switching unit comprises a first switch and a second switch, and the common-source amplification unit comprises a first transistor, a second transistor, a blocking capacitor, a voltage stabilizing capacitor, a choke inductor and a feedback inductor;
wherein a first end of each first inductor is connected to a corresponding signal input end, a first end of a first switch and a first end of a second switch of each switch switching unit are both connected to a second end of the corresponding first inductor, a second end of the first switch is connected to an input end of the bypass matching network, a second end of the second switch is connected to a first end of the dc blocking capacitor, a second end of the dc blocking capacitor is connected to a gate of the first transistor, a source of the first transistor is grounded through the feedback inductor, a drain of the first transistor is connected to a source of the second transistor, a gate of the second transistor is grounded through the voltage stabilizing capacitor, a drain of the second transistor is connected to a supply voltage VDD through the choke inductor, an input end of the output matching network is connected to a drain of the second transistor, an output end of the output matching network is connected to an input end of the resistance attenuation network through the amplification output switch, an output end of the bypass matching network is connected to an input end of the resistance attenuation network, and an output end of the resistance attenuation network is connected to the signal output end.
2. The multiband low noise amplifier of claim 1, wherein each of said switch switching units further comprises a third switch, a first terminal of each of said third switches being connected to a second terminal of a corresponding first inductor, a second terminal of each of said third switches being grounded.
3. The multiband low noise amplifier of claim 1, wherein said output matching network comprises a first variable capacitor;
the first end of the first variable capacitor is an input end of the output matching network and is connected with the drain electrode of the second transistor, and the second end of the first variable capacitor is an output end of the output matching network and is connected with the amplification output switch.
4. The multiband low noise amplifier of claim 3, wherein said first variable capacitor comprises a first capacitor bank, a second capacitor bank, and a third capacitor bank;
the first capacitor bank comprises one or a plurality of first capacitor branches connected in parallel, each first capacitor branch comprises a first capacitor and a first capacitor change-over switch which are connected, the second capacitor bank comprises one or a plurality of second capacitor branches connected in parallel, each second capacitor branch comprises a second capacitor and a second capacitor change-over switch which are connected, the third capacitor bank comprises one or a plurality of third capacitor branches connected in parallel, and each third capacitor branch comprises a third capacitor and a third capacitor change-over switch which are connected;
the first end of the first capacitance branch circuit is connected with the first end of the second capacitance branch circuit to serve as the first end of the first variable capacitor, the second end of the first capacitance branch circuit is connected with the first end of the third capacitance branch circuit to serve as the second end of the first variable capacitor, and the second end of the second capacitance branch circuit and the second end of the third capacitance branch circuit are both grounded.
5. The multiband low noise amplifier of claim 1, wherein said resistive damping network comprises a fourth switch and a variable resistor;
the first end of the fourth switch and the first end of the variable resistor are connected to serve as the input end of the resistance attenuation network and are connected with the bypass output switch and the amplification output switch, and the second end of the fourth switch and the second end of the variable resistor are connected to serve as the output end of the resistance attenuation network and are connected with the signal output end.
6. The multiband low noise amplifier of claim 5, wherein the variable resistor comprises a first resistor group, a second resistor group, and a third resistor group;
the first resistor group comprises one or a plurality of first resistor branches connected in parallel, each first resistor branch comprises a first resistor and a first resistor change-over switch which are connected, the second resistor group comprises one or a plurality of second resistor branches connected in parallel, each second resistor branch comprises a second resistor and a second resistor change-over switch which are connected, the third resistor group comprises one or a plurality of third resistor branches connected in parallel, and each third resistor branch comprises a third resistor and a third resistor change-over switch which are connected;
the first end of the first resistance branch is connected with the first end of the second resistance branch to serve as the first end of the variable resistor, the second end of the first resistance branch is connected with the first end of the third resistance branch to serve as the second end of the variable resistor, and the second end of the second resistance branch and the second end of the third resistance branch are both grounded.
7. The multiband low noise amplifier of claim 1, wherein said bypass matching network comprises a second variable capacitor, a fourth capacitance, a fifth capacitance, a sixth capacitance, and a second inductance;
the first end of the second variable capacitor and the first end of the fourth capacitor are connected to serve as an input end of the bypass matching network and connected to the second end of the first switch, the second end of the fourth capacitor 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, the second end of the second inductor is connected to ground, the second end of the fifth capacitor and the first end of the sixth capacitor are connected to serve as an output end of the bypass matching network and connected to the bypass output switch, and the second end of the sixth capacitor is connected to ground.
8. The multiband low noise amplifier of claim 7, wherein said second variable capacitor comprises a plurality of fourth capacitive branches connected in parallel, each of said fourth capacitive branches comprising a seventh capacitance and a fourth capacitance changeover switch connected.
9. The multiband low noise amplifier of claim 1, wherein said common-source stage amplification unit further comprises a first bias resistor and a second bias resistor;
a first end of the first bias resistor is connected with a grid electrode of the first transistor, and a second end of the first bias resistor is connected with a first bias signal; the first end of the second bias resistor is connected with the grid electrode of the second transistor, and the second end of the second bias resistor is connected with a second bias signal.
10. A communication device comprising a multiband low noise amplifier according to any one of claims 1 to 9.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211125968.8A CN115208338A (en) | 2022-09-16 | 2022-09-16 | Multi-band low noise amplifier and communication equipment |
| PCT/CN2023/109902 WO2024055761A1 (en) | 2022-09-16 | 2023-07-28 | Multi-band low-noise amplifier and communication device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211125968.8A CN115208338A (en) | 2022-09-16 | 2022-09-16 | Multi-band low noise amplifier and communication equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115208338A true CN115208338A (en) | 2022-10-18 |
Family
ID=83571911
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211125968.8A Pending CN115208338A (en) | 2022-09-16 | 2022-09-16 | Multi-band low noise amplifier and communication equipment |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN115208338A (en) |
| WO (1) | WO2024055761A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117220639A (en) * | 2023-11-07 | 2023-12-12 | 成都明夷电子科技有限公司 | Input broadband matching circuit architecture and electronic chip applicable to wireless receiver |
| WO2024055761A1 (en) * | 2022-09-16 | 2024-03-21 | 深圳飞骧科技股份有限公司 | Multi-band low-noise amplifier and communication device |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202617072U (en) * | 2012-05-24 | 2012-12-19 | 江南大学 | Multi-standard and multi frequency range low noise amplifier |
| CN109845098A (en) * | 2016-08-31 | 2019-06-04 | 天工方案公司 | Multi input amplifier with degenerated switch block and low-loss bypass functionality |
| CN109891742A (en) * | 2016-08-30 | 2019-06-14 | 天工方案公司 | Multi input amplifier with Programmable Embedded attenuator |
| CN110719074A (en) * | 2019-09-23 | 2020-01-21 | 成都航天科工微电子***研究院有限公司 | Tunable broadband low-noise amplifier |
| CN110752829A (en) * | 2019-09-23 | 2020-02-04 | 航天科工微电子***研究院有限公司 | Bias circuit and amplifier circuit applied to 5G WiFi communication low-noise amplifier |
| CN111600556A (en) * | 2020-06-30 | 2020-08-28 | 河北新华北集成电路有限公司 | Low noise amplifier and radio frequency receiver |
| US20220255520A1 (en) * | 2020-12-31 | 2022-08-11 | Skyworks Solutions, Inc. | Multi-input amplifier with degeneration switching without the use of switches |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010113093A1 (en) * | 2009-04-01 | 2010-10-07 | Koninklijke Philips Electronics N.V. | Noise matching in couplet antenna arrays |
| CN108336976B (en) * | 2018-02-07 | 2023-08-01 | 广州慧智微电子股份有限公司 | Multi-band low-noise amplifier and amplifying method |
| CN115441839A (en) * | 2022-09-16 | 2022-12-06 | 深圳飞骧科技股份有限公司 | Multi-band low noise amplifier, integrated circuit chip and electronic device |
| CN115208338A (en) * | 2022-09-16 | 2022-10-18 | 深圳飞骧科技股份有限公司 | Multi-band low noise amplifier and communication equipment |
-
2022
- 2022-09-16 CN CN202211125968.8A patent/CN115208338A/en active Pending
-
2023
- 2023-07-28 WO PCT/CN2023/109902 patent/WO2024055761A1/en unknown
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202617072U (en) * | 2012-05-24 | 2012-12-19 | 江南大学 | Multi-standard and multi frequency range low noise amplifier |
| CN109891742A (en) * | 2016-08-30 | 2019-06-14 | 天工方案公司 | Multi input amplifier with Programmable Embedded attenuator |
| CN109845098A (en) * | 2016-08-31 | 2019-06-04 | 天工方案公司 | Multi input amplifier with degenerated switch block and low-loss bypass functionality |
| CN110719074A (en) * | 2019-09-23 | 2020-01-21 | 成都航天科工微电子***研究院有限公司 | Tunable broadband low-noise amplifier |
| CN110752829A (en) * | 2019-09-23 | 2020-02-04 | 航天科工微电子***研究院有限公司 | Bias circuit and amplifier circuit applied to 5G WiFi communication low-noise amplifier |
| CN111600556A (en) * | 2020-06-30 | 2020-08-28 | 河北新华北集成电路有限公司 | Low noise amplifier and radio frequency receiver |
| US20220255520A1 (en) * | 2020-12-31 | 2022-08-11 | Skyworks Solutions, Inc. | Multi-input amplifier with degeneration switching without the use of switches |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024055761A1 (en) * | 2022-09-16 | 2024-03-21 | 深圳飞骧科技股份有限公司 | Multi-band low-noise amplifier and communication device |
| CN117220639A (en) * | 2023-11-07 | 2023-12-12 | 成都明夷电子科技有限公司 | Input broadband matching circuit architecture and electronic chip applicable to wireless receiver |
| CN117220639B (en) * | 2023-11-07 | 2024-03-12 | 成都明夷电子科技股份有限公司 | Input broadband matching circuit architecture and electronic chip applicable to wireless receiver |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2024055761A1 (en) | 2024-03-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN115208338A (en) | Multi-band low noise amplifier and communication equipment | |
| KR101752544B1 (en) | System and method for a radio frequency integrated circuit | |
| US7394313B2 (en) | Multiple power mode amplifier with bias modulation option and without bypass switches | |
| WO2024055760A1 (en) | Multi-band low-noise amplifier, integrated circuit chip and electronic device | |
| CN110311630A (en) | System and method for bypassing low-noise amplifier | |
| CN115296620B (en) | Multi-band adjustable gain low-noise amplifier | |
| US20230108382A1 (en) | Dual-band low-noise amplifier circuit, low-noise amplifier, and device | |
| US9219452B2 (en) | Dual mode receiver with RF splitter using programmable passive components | |
| US10931246B2 (en) | High-frequency amplifier circuitry and semiconductor device | |
| GB2427774A (en) | A compact balanced mobile phone amplifier using impedance-transforming quadrature hybrid couplers | |
| WO2018044793A1 (en) | Low-noise amplifier having programmable-phase gain stage | |
| CN104733809A (en) | Switching Circuit And Semiconductor Module | |
| CN111742491A (en) | Switch circuit, high-frequency front-end circuit, and communication device | |
| GB2493045A (en) | A receiver amplifier configurable for common-gate or inductively-degenerated operation | |
| US20220321074A1 (en) | Power amplification with reduced gain variation | |
| Aneja et al. | Multiband LNAs for software-defined radios: recent advances in the design of multiband reconfigurable LNAs for SDRs in CMOS, microwave integrated circuits technology | |
| CN116248052A (en) | Low noise amplifier and radio frequency chip | |
| CN115642927B (en) | Radio frequency signal receiving front-end module, signal transmission control method and mobile terminal | |
| US20230030709A1 (en) | Broadband low noise amplifier using multiple cascode stages | |
| CN112039451B (en) | Variable gain circuit and high frequency switch | |
| JP2019197968A (en) | Variable gain amplifier | |
| CN118232874A (en) | Reconfigurable notch filter, low-noise amplifier, chip and equipment | |
| CN116169961A (en) | Low-noise amplifier and corresponding electronic equipment | |
| CN118074635A (en) | Frequency band reconfigurable low noise amplifier based on current multiplexing technology | |
| CN117978109A (en) | Dual-frequency transconductance boosting technology, amplifier, electronic equipment and control method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20221018 |