CN110739918A - kinds of radio frequency amplifier - Google Patents
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- CN110739918A CN110739918A CN201810790550.6A CN201810790550A CN110739918A CN 110739918 A CN110739918 A CN 110739918A CN 201810790550 A CN201810790550 A CN 201810790550A CN 110739918 A CN110739918 A CN 110739918A
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- 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
- H03F1/52—Circuit arrangements for protecting such amplifiers
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- 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
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/189—High-frequency amplifiers, e.g. radio frequency amplifiers
- H03F3/19—High-frequency amplifiers, e.g. radio frequency amplifiers with semiconductor devices only
- H03F3/195—High-frequency amplifiers, e.g. radio frequency amplifiers with semiconductor devices only in integrated circuits
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/20—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers
- H03F3/21—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers with semiconductor devices only
- H03F3/213—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers with semiconductor devices only in integrated circuits
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F2200/00—Indexing scheme relating to amplifiers
- H03F2200/451—Indexing scheme relating to amplifiers the amplifier being a radio frequency amplifier
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The invention discloses radio frequency amplifiers, which convert the voltage output by the bias power supply into the input bias voltage by arranging a voltage conversion network between the input bias network and the bias power supply, realize that a single power supply simultaneously provides the input bias voltage and the output bias voltage for the radio frequency amplifier, and control the conduction of a control switch circuit by the output control signal of a signal output end of a voltage conversion network control signal, so that the voltage output by the bias power supply is transmitted to the input end of the output bias network by controlling the switch circuit, and the output bias network is provided for a depletion type amplifier device.
Description
Technical Field
The embodiment of the invention relates to the technical field of wireless communication, in particular to radio frequency amplifiers.
Background
In the fields of wireless communication, radar, millimeter wave and the like, a radio frequency power amplifier is an essential core link in related equipment. The rf power amplifier needs to provide a proper bias voltage when operating. The input bias voltage of the radio frequency power amplifier is loaded on the input end of the amplifier device through the input bias network, and the output bias voltage is loaded on the output end of the amplifier device through the output bias network, so that the proper input bias voltage and output bias voltage are the premise that the radio frequency power amplifier normally works. The input bias of the depletion type radio frequency power amplifier is negative voltage, and the output bias is positive voltage. The input bias voltage of the depletion type radio frequency power amplifier needs deeper negative bias to close the depletion type radio frequency power amplifier, so that the depletion type radio frequency power amplifier is in an on state under the condition that the input end has no input, the voltage of the input end is zero and is far higher than the threshold voltage of the depletion type radio frequency power amplifier during normal operation, and if the output bias voltage is provided for the output end of the radio frequency power amplifier, overlarge output current is generated due to the overhigh input bias voltage of the output end, and the radio frequency amplifier is burnt.
Disclosure of Invention
The invention provides radio frequency amplifiers, which are used for providing output bias voltage after the preparation of the input bias voltage of the radio frequency amplifier is finished, thereby ensuring the time sequence of the input bias voltage and the output bias voltage and avoiding the phenomenon that the radio frequency amplifier is burnt.
, the embodiment of the invention provides kinds of radio frequency amplifiers, including an input bias network, a depletion mode amplifier device, an output bias network, a voltage conversion network, a control switch circuit and a bias power supply;
the output end of the input bias network is electrically connected with the input end of the depletion mode amplifier device;
the output end of the output bias network is electrically connected with the output end of the depletion mode amplifier device;
the voltage conversion network comprises an input end, an output end and a control signal output end, wherein the input end of the voltage conversion network is electrically connected with the output end of the bias power supply, and the output end of the voltage conversion network is electrically connected with the input end of the input bias network; the voltage conversion network is used for converting the power supply voltage output by the bias power supply output end into the input bias voltage of the input bias network;
the control switch circuit comprises an th end, a second end and a control end, the control end of the control switch circuit is electrically connected with the control signal output end of the voltage conversion network, the th end of the control switch circuit is electrically connected with the output end of the bias power supply, the second end of the control switch circuit is electrically connected with the input end of the output bias network, and the control switch circuit is used for transmitting the power supply voltage output by the bias power supply output end to the input end of the output bias network according to the control signal output by the control signal output end of the voltage conversion network.
Specifically, the voltage conversion network comprises a voltage conversion chip and a control signal output circuit;
the voltage conversion chip comprises an th voltage input end, a voltage output end and a voltage control end, wherein the th voltage input end of the voltage conversion chip is used as the input end of the voltage conversion network, and the voltage output end of the voltage conversion chip is used as the output end of the voltage conversion network;
the control signal input end of the control signal output circuit is electrically connected with the voltage control end of the voltage conversion chip, the input end of the control signal output circuit is electrically connected with the output end of the bias voltage, and the output end of the control signal output circuit is used as the control signal output end of the voltage conversion network; the control signal output circuit is used for outputting the control signal after the voltage control end of the voltage conversion chip outputs the signal.
Specifically, the voltage conversion chip further comprises a second voltage input terminal and a switching transistor;
the control end of the switch transistor is electrically connected with the voltage output end of the voltage conversion chip, the th end of the switch transistor is electrically connected with the second voltage input end, and the second end of the switch transistor is used as the voltage control end of the voltage conversion chip.
Specifically, the switching transistor is a P-type transistor.
Specifically, the voltage conversion network further comprises a voltage dividing sub-circuit;
an th input end of the voltage division sub-circuit is electrically connected with an output end of the bias power supply, a second input end of the voltage division sub-circuit is grounded, and an output end of the voltage division sub-circuit is electrically connected with a second voltage input end of the voltage conversion chip;
the voltage division sub-circuit is used for dividing the voltage output by the bias power supply and then inputting the divided voltage to the second voltage input end of the voltage conversion chip.
Specifically, the voltage dividing sub-circuit comprises an th voltage dividing resistor and a second voltage dividing resistor;
a th terminal of the th voltage-dividing resistor serves as a th input terminal of the voltage-dividing sub-circuit, a second terminal of the th voltage-dividing resistor is electrically connected to a th terminal of the second voltage-dividing resistor, a th terminal of the second voltage-dividing resistor serves as an output terminal of the voltage-dividing sub-circuit, and a second terminal of the second voltage-dividing resistor serves as a second input terminal of the voltage-dividing sub-circuit.
Specifically, the control signal output circuit includes an th transistor, a th resistor, a second resistor, a third resistor, and a th capacitor;
a terminal of the th resistor is used as a control signal input terminal of the control signal output circuit, and a second terminal of the th resistor is electrically connected with a control terminal of the th transistor;
the end of the th capacitor is electrically connected with the end of the th resistor, and the second end of the th capacitor is grounded;
a terminal of the th transistor is electrically connected to the terminal of the second resistor, and a second terminal of the th transistor is grounded;
the second end of the second resistor is electrically connected with the th end of the third resistor, the second end of the third resistor is electrically connected with the output end of the bias power supply, and the second end of the second resistor is used as the output end of the control signal output circuit.
Specifically, the radio frequency amplifier further comprises a signal input end, a signal output end, an input matching network and an output matching network;
the input end of the input matching network is electrically connected with the signal input end, and the output end of the input matching network is electrically connected with the input end of the depletion-mode amplifier device;
the input end of the output matching network is electrically connected with the output end of the depletion type amplifier device, and the output end of the output matching network is electrically connected with the signal output end.
Specifically, the control switch circuit is an th control switch, the th control switch comprises a th terminal, a second terminal and a control terminal, and the th control switch switches the th terminal and the second terminal of the th control switch on or off according to the voltage of the control terminal;
the control terminal of the th control switch is used as the control terminal of the control switch circuit, the th control switch of the th control switch is used as the th terminal of the control switch circuit, and the second terminal of the th control switch is used as the second terminal of the control switch circuit.
Specifically, the bias power supply is a direct current power supply, and the voltage output by the bias power supply is greater than the voltage output by the output end of the voltage conversion network.
The invention converts the voltage output by the bias power supply into the input bias voltage by arranging the voltage conversion network between the input bias network and the bias power supply, realizes that a single power supply simultaneously provides the input bias voltage and the output bias voltage for the radio frequency amplifier, and reduces the number of the power supplies. And the voltage conversion network control signal output end outputs a control signal to control the switch circuit to be conducted, so that the voltage output by the bias power supply is transmitted to the input end of the output bias network through the control switch circuit, and the output bias voltage is provided for the depletion-mode amplifier device. Therefore, the output bias network can provide the output bias voltage for the depletion type amplifier device only after the input bias voltage of the input bias network is loaded to the input end of the depletion type amplifier device, and the phenomenon that the device is burnt due to the fact that the output bias voltage is too high and too large output current is generated is avoided.
Drawings
Fig. 1 is a schematic structural diagram of kinds of radio frequency amplifiers provided by an embodiment of the invention;
fig. 2 is a schematic structural diagram of voltage conversion networks provided by the embodiment of the present invention;
FIG. 3 is a schematic circuit diagram of voltage converting chips and peripheral circuits according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of another voltage conversion networks provided in the embodiment of the present invention;
fig. 5 is a schematic structural diagram of another voltage conversion networks provided in the embodiment of the present invention;
fig. 6 is a schematic structural diagram of another rf amplifiers provided in the embodiment of the present invention;
fig. 7 is a schematic structural diagram of another kinds of rf amplifiers provided in the embodiment of the present invention.
Detailed Description
The present invention will now be described in further detail with reference to the drawings and examples, it being understood that the specific embodiments herein described are merely illustrative of and not restrictive on the broad invention, and it should be further noted that for the purposes of description, only some, but not all, of the structures associated with the present invention are shown in the drawings.
Fig. 1 is a schematic structural diagram of rf amplifiers according to an embodiment of the present invention, as shown in fig. 1, the rf amplifier includes an input bias network 110, a depletion mode amplifier device 120, an output bias network 130, a voltage conversion network 140, a control switch circuit 150, and a bias power supply 160, an output terminal Vout1 of the input bias network 110 is electrically connected to an input terminal Vin2 of the depletion mode amplifier device 120, and an output terminal Vout3 of the output bias network 130 is electrically connected to an output terminal Vout2 of the depletion mode amplifier device 120.
The voltage conversion network 140 includes an input terminal Vin4, an output terminal Vout4, and a control signal output terminal Kout, the input terminal Vin4 of the voltage conversion network 140 is electrically connected to the output terminal Vout6 of the bias power supply 160, and the output terminal Vout4 of the voltage conversion network 140 is electrically connected to the input terminal Vin1 of the input bias network 110. The voltage conversion network 140 is used to convert the power supply voltage output by the output terminal Vout6 of the bias power supply 160 into the input bias voltage of the input bias network 110.
The control switch circuit 150 includes an th terminal A1, a second terminal A2 and a control terminal Kin, the control terminal Kin of the control switch circuit 150 is electrically connected to the control signal output terminal Kout of the voltage transformer network 140, the th terminal A1 of the control switch circuit 150 is electrically connected to the output terminal Vout6 of the bias power supply 160, the second terminal A2 of the control switch circuit 150 is electrically connected to the input terminal Vin3 of the output bias network 130, and the control switch circuit 150 is configured to transmit the supply voltage output from the output terminal Vout6 of the bias power supply 160 to the input terminal Vin3 of the output bias network 130 according to the control signal output from the control signal output terminal Kout of the voltage transformer network 140.
Specifically, as shown in fig. 1, the input bias network 110 provides an input bias voltage to the depletion amplifier device 120 to control the operation state of the depletion amplifier device 120, the output bias network 130 provides an output bias voltage to the depletion amplifier device 120 to provide power required for the operation of the depletion amplifier device 120, the depletion amplifier device 120 has input bias threshold voltages, when the input bias voltage is lower than the input bias threshold voltage, the depletion amplifier device 120 is in an off state, no current is output from the output terminal Vout2 of the depletion amplifier device 120, the depletion amplifier device 120 cannot amplify the signal, when the input bias voltage is higher than the input bias threshold voltage, the depletion amplifier device 120 is in an on state, the current starts to appear at the output terminal Vout2 of the depletion amplifier device 120, the depletion amplifier device 120 can operate normally, and when the input bias voltage is higher than the input bias threshold voltage, the higher the current is at the output terminal 2 of the depletion amplifier device 120, the larger the amplification factor of the depletion amplifier device 120 is.
The input bias network 110 and the output bias network 130 share bias power supplies 160, wherein, the bias power supply 160 generates negative voltages at the output terminal Vout6 of the bias power supply 160 to input the bias network 110 and output the bias network 130 simultaneously, the input bias network 110 decouples and adjusts the negative voltages output by the voltage conversion network 140, and outputs the input bias voltage to the input terminal Vin2 of the depletion amplifier device 120. the bias power supply 160 controls whether to provide the voltage output by the bias power supply 160 to the output bias network 130 by controlling the switch circuit 150, when the switch circuit 150 is controlled to be conducted, the output bias network 130 decouples and adjusts the voltage provided by the bias power supply 160 to form the output bias voltage, and outputs the output bias voltage to the output terminal Vout2 of the depletion amplifier device 120.
the bias power supply 160 is a dc power supply and the output voltage of the bias power supply 160 is a positive voltage, while the input bias voltage of the input bias network 110 corresponding to the depletion-mode amplifier device 120 is a negative voltage and the output bias voltage of the output bias network 120 is a positive voltage, so the voltage converting network 140 is required to convert the voltage output from the output terminal Vout6 of the bias power supply 160 to provide the input bias voltage for the input bias network 110. the voltage output from the bias power supply 160 is a positive voltage, which is greater than the negative voltage output from the output terminal of the voltage converting network 140, so the voltage converting network 140 realizes voltage reduction.
Before the signal is input at the signal input end Vin, the voltage at the input end Vin2 of the depletion amplifier device 120 is zero, at this time, the depletion amplifier device 120 is in a conducting state and is far higher than the input bias threshold voltage when the depletion amplifier device 120 normally works (in the case of , the threshold voltage when the depletion amplifier device 120 normally works is negative), if the output bias voltage is provided by the output bias network 130, the current output at the output end Vout2 of the depletion amplifier device 120 is very large, which causes the burnout of the depletion amplifier device 120, therefore, the output bias voltage is provided to the output bias network 130 only after the input bias voltage of the input bias network 110 is negative, so as to avoid the burnout of the device.
In this process, the output bias network 130 is connected to a bias power supply 160 through a control switch circuit 150. When the control switch circuit 150 is turned on, the voltage output by the bias power supply 160 is transmitted to the input terminal Vin3 of the output bias network 130 to provide a positive voltage to the output bias network 130. The control signal output terminal Kout of the voltage converting network 140 is electrically connected to the control terminal Kin of the control switch circuit 150. When the output terminal Vout4 of the voltage transformer network 140 outputs the input bias voltage of the input bias network 110, the control signal output terminal Kout of the voltage transformer network 140 outputs a control signal to the control terminal Kin of the control switch circuit 150 to control the conduction thereof, so as to transmit the positive voltage output by the bias power supply 160 to the input terminal Vin3 of the output bias network 130, and the output bias network 130 decouples and adjusts the positive voltage to form an output bias voltage, and transmits the output bias voltage to the output terminal Vout2 of the depletion-type amplifier device 120. Therefore, the output bias network 130 can provide the output bias voltage for the depletion mode amplifier device 120 only after the input bias voltage of the input bias network 110 is loaded to the input terminal Vin2 of the depletion mode amplifier device 120, so that the phenomenon that the device is burnt due to the fact that the output current is too large because of too high input bias voltage is avoided.
According to the technical scheme of the embodiment, the voltage conversion network is arranged between the input bias network and the bias power supply, the voltage output by the bias power supply is converted into the input bias voltage, a single power supply simultaneously provides the input bias voltage and the output bias voltage for the radio frequency amplifier, and the number of the power supplies is reduced. And the voltage conversion network control signal output end outputs a control signal to control the switch circuit to be conducted, so that the voltage output by the bias power supply is transmitted to the input end of the output bias network through the control switch circuit, and the output bias voltage is provided for the depletion-mode amplifier device. Therefore, the output bias network can provide the output bias voltage for the depletion type amplifier device only after the input bias voltage of the input bias network is loaded to the input end of the depletion type amplifier device, and the phenomenon that the device is burnt due to the fact that the output bias voltage is too high and too large output current is generated is avoided.
On the basis of the above technical solution, fig. 2 is a schematic structural diagram of voltage conversion networks provided by an embodiment of the present invention, and with reference to fig. 1 and fig. 2, the voltage conversion network 140 includes a voltage conversion chip 141 and a control signal output circuit 142, the voltage conversion chip 141 includes a th voltage input terminal in1, a voltage output terminal out1 and a voltage control terminal Cout, the th voltage input terminal in1 of the voltage conversion chip 141 serves as an input terminal Vin4 of the voltage conversion network 140, the voltage output terminal out1 of the voltage conversion chip 141 serves as an output terminal Vout4 of the voltage conversion network 140, and the voltage conversion chip 141 converts the power supply voltage output by the output terminal Vout6 of the bias power supply 160 into the input bias voltage input to the bias network 110.
A control signal input terminal Cin of the control signal output circuit 142 is electrically connected to the voltage control terminal Cout of the voltage conversion chip 141, and an output terminal out2 of the control signal output circuit 142 serves as a control signal output terminal Kout of the voltage conversion network 140; the control signal output circuit 142 is configured to output a control signal after the voltage control terminal Cout of the voltage conversion chip 141 outputs a signal.
Illustratively, fig. 3 is a schematic circuit diagram of voltage conversion chips and peripheral circuits provided by an embodiment of the invention, as shown in fig. 3, the model of the voltage conversion chip 141 may be TPS54260DGQ, and at this time, the PWRGD pin on the TPS54260DGQ is the voltage control terminal cout of the voltage conversion chip 141, and in order to make the TPS54260DGQ operate normally, the periphery of the TPS54260DGQ further includes other circuits or elements, and is electrically connected to other pins on the TPS54260DGQ, for example, an output inductor L1 is connected in series between the output terminal out1 and ground for storing electric energy and reducing ripple of the output current, so that the output current is smoothed, a freewheeling diode D1 is connected between the pH pin and the GND pin, when the internal power supply of the TPS54260DGQ is turned off, a current flows through the output inductor L1 to play a role of freewheeling, an initial capacitor is connected between the pH pin and the GND pin, an initial capacitor Cst is connected between the pH pin and the GND terminal, a boost voltage compensation transistor 82 inside the TPS 5482 is connected to the chip, and the output voltage compensation circuit 1412 is connected in parallel to make the output voltage conversion chip 141, and the output voltage compensation circuit for stabilizing the output of the output voltage compensation circuit 1412, and the output compensation circuit for stabilizing the output voltage compensation circuit for stabilizing the output pin.
Specifically, when the output terminal out1 of the voltage converting chip 141 outputs no voltage or the output voltage is not the input bias voltage, the voltage control terminal Cout does not output a signal, the control signal output circuit 142 does not output a control signal, and the control switch circuit 150 is in the off state. When the voltage output by the output terminal out1 of the voltage conversion chip 141 is the input bias voltage, the voltage control terminal Cout outputs a signal, the control signal output circuit 142 outputs a control signal, and the control switch circuit 150 is turned on, so that the voltage output by the output terminal Vout6 of the bias power supply 160 can be loaded to the output bias network 130 through the control switch circuit 150.
On the basis of the above technical solution, with continued reference to fig. 1 and fig. 2, the voltage converting chip 141 further includes a second voltage input terminal in2 and a switching transistor Q, the control terminal ctrl of the switching transistor Q is electrically connected to the voltage output terminal out1 of the voltage converting chip 141, the -th terminal a of the switching transistor Q is electrically connected to the second voltage input terminal in2, and the second terminal B of the switching transistor Q is used as the voltage control terminal Cout of the voltage converting chip 141.
Specifically, the input bias voltage of the depletion-mode amplifier device is negative voltage, and the voltage provided by the bias power supply 160 is positive voltage, so the voltage converting chip 141 converts the positive voltage into the negative voltage, and the output terminal out1 of the voltage converting chip 141 outputs a low level, at this time, the switching transistor Q may be configured as a P-type transistor, when the output terminal out1 of the voltage converting chip 141 does not output the voltage or outputs the high level, the switching transistor Q is not turned on, and the voltage control terminal Cout of the voltage converting chip 141 does not output the signal, when the output terminal out1 of the voltage converting chip 141 outputs the low level, the switching transistor Q is controlled to be turned on, and the switching transistor Q transmits the voltage input from the second voltage input terminal in2 of the voltage converting chip 141 to the voltage control terminal Cout of the voltage converting chip 141, and outputs the voltage input from the second voltage input terminal in 2.
On the basis of the above technical solution, fig. 4 is a schematic structural diagram of another voltage conversion networks provided by the embodiment of the present invention, as shown in fig. 4, the voltage conversion network further includes a voltage-dividing sub-circuit 143, an input terminal C of of the voltage-dividing sub-circuit 143 is electrically connected to an output terminal Vout6 of the bias power supply 160, a second input terminal D of the voltage-dividing sub-circuit 143 is grounded, an output terminal E of the voltage-dividing sub-circuit 143 is electrically connected to a second voltage input terminal in2 of the voltage conversion chip 141, and the voltage-dividing sub-circuit 143 is configured to divide the voltage output by the bias power supply 160 and input the divided voltage to the second voltage input terminal in2 of the voltage conversion chip.
Specifically, the voltage dividing sub-circuit 143 includes th voltage dividing resistor Rt1 and second voltage dividing resistor Rt 2. the end of the th voltage dividing resistor Rt1 is used as the th input end C of the voltage dividing sub-circuit 143, the second end of the th voltage dividing resistor Rt1 is electrically connected to the th end of the second voltage dividing resistor Rt2, the th end of the second voltage dividing resistor Rt2 is used as the output end E of the voltage dividing sub-circuit 143, the second end of the second voltage dividing resistor Rt2 is used as the second input end d of the voltage dividing sub-circuit, the th voltage dividing resistor Rt1 and the second voltage dividing resistor Rt2 in the voltage dividing sub-circuit 143 are connected in series, the voltage outputted by the bias power supply 160 is divided, and the voltage at the second voltage dividing resistor Rt2 is outputted as the output voltage to the second voltage input end in2 of the voltage converting chip 141.
Based on the above technical solutions, fig. 5 is a schematic structural diagram of another voltage conversion network according to the embodiment of the present invention, and as shown in fig. 5, the control signal output circuit 142 includes a -th transistor T1, a 0-th resistor R1, a second resistor R2, a third resistor R3, and a 1-29-1-th capacitor C1, a second 3-end a of a 2-th resistor R1 is used as a control signal input terminal Cin of the control signal output circuit 142, a second end b of a 4-4 resistor is electrically connected to a control end C of a 5-th transistor T1, a 7-end f of a 6-th capacitor C1 is electrically connected to a -end a of a -th resistor R1, a second end g of a -capacitor C1 is grounded, a second end -end d of an -th transistor T1 is electrically connected to a -end k of a second resistor R2, a second end T -72-e-T is electrically connected to a ground, a second end g-R72-R72 is electrically connected to a second end of a power supply terminal , and a second end -R-p of a bias output terminal and a bias output terminal of a - .
Specifically, after the voltage control terminal Cout of the voltage conversion chip 141 outputs a signal, the signal is loaded to the control terminal of the th transistor T1 through the th resistor R1, and the th transistor T1 is controlled to be turned on, at this time, the second resistor R2, the third resistor R3 and the th transistor T1 form a loop, since the second terminal e of the th transistor T1 is grounded, the second terminal p of the third resistor R3 is electrically connected to the output terminal Vout6 of the bias power supply 160, the second resistor R2 and the third resistor R3 divide the voltage output by the output terminal Vout6 of the bias power supply 160, and the voltage across the second resistor R2 is used as a control signal and output from the output terminal out2 of the control signal output circuit 142, so as to control the on of the control switch circuit.
On the basis of the above technical solutions, fig. 6 is a schematic structural diagram of another radio frequency amplifiers provided in the embodiments of the present invention, and with reference to fig. 5 and fig. 6, the control switch circuit 150 controls the switch K1. to to control the switch K1 to include an th terminal, a second terminal, and a control terminal, and the control switch K1 turns on or off the switch th terminal and the second terminal according to a voltage of the control terminal.
The control terminal of the th control switch K1 is used as the control terminal Kin of the control switch circuit, the th terminal of the th control switch K1 is used as the th terminal A1 of the control switch circuit, and the second terminal of the th control switch K1 is used as the second terminal A2 of the control switch circuit.
Specifically, the control terminal of the -th control switch K1 is electrically connected to the output terminal out2 of the control signal output circuit 142, and the voltage output by the output terminal out2 of the control signal output circuit 142 is the divided voltage of the second resistor R2 to the bias power supply 160, so that the voltage output by the output terminal out2 of the control signal output circuit 142 is at a high level, and the -th control switch K1 is turned on at the high level, so that the voltage output by the output terminal Vout6 of the bias power supply 160 is transmitted to the output bias network 130 through the -th control switch K1, so as to provide the output bias voltage for the depletion amplifier device 120.
On the basis of the above technical solutions, fig. 7 is a schematic structural diagram of another kinds of radio frequency amplifiers provided by the embodiment of the present invention, as shown in fig. 7, the radio frequency amplifier further includes an input matching network 170 and an output matching network 180, an input end of the input matching network 180 is electrically connected to the signal input end Vin, an output end of the input matching network 170 is electrically connected to the input end Vin2 of the depletion type amplifier device 120, and the input matching network 170 can implement impedance matching connection between the signal input end Vin and the depletion type amplifier device 120.
The input of the output matching network 180 is electrically connected to the output terminal Vout2 of the depletion amplifier device 120, and the output of the output matching network 180 is electrically connected to the signal output terminal Vout. The output matching network 180 may implement an impedance-matched connection between the signal output terminal Vout and the depletion amplifier device 120.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (10)
1, kinds of radio frequency amplifier, characterized by, including inputting the bias network, depletion mode amplifier device, outputting the bias network, voltage switching network, control switch circuit and bias power supply;
the output end of the input bias network is electrically connected with the input end of the depletion mode amplifier device;
the output end of the output bias network is electrically connected with the output end of the depletion mode amplifier device;
the voltage conversion network comprises an input end, an output end and a control signal output end, wherein the input end of the voltage conversion network is electrically connected with the output end of the bias power supply, and the output end of the voltage conversion network is electrically connected with the input end of the input bias network; the voltage conversion network is used for converting the power supply voltage output by the bias power supply output end into the input bias voltage of the input bias network;
the control switch circuit comprises an th end, a second end and a control end, the control end of the control switch circuit is electrically connected with the control signal output end of the voltage conversion network, the th end of the control switch circuit is electrically connected with the output end of the bias power supply, the second end of the control switch circuit is electrically connected with the input end of the output bias network, and the control switch circuit is used for transmitting the power supply voltage output by the bias power supply output end to the input end of the output bias network according to the control signal output by the control signal output end of the voltage conversion network.
2. The radio frequency amplifier of claim 1, wherein the voltage conversion network comprises a voltage conversion chip and a control signal output circuit;
the voltage conversion chip comprises an th voltage input end, a voltage output end and a voltage control end, wherein the th voltage input end of the voltage conversion chip is used as the input end of the voltage conversion network, and the voltage output end of the voltage conversion chip is used as the output end of the voltage conversion network;
the control signal input end of the control signal output circuit is electrically connected with the voltage control end of the voltage conversion chip, the input end of the control signal output circuit is electrically connected with the output end of the bias voltage, and the output end of the control signal output circuit is used as the control signal output end of the voltage conversion network; the control signal output circuit is used for outputting the control signal after the voltage control end of the voltage conversion chip outputs the signal.
3. The radio frequency amplifier of claim 2, wherein the voltage conversion chip further comprises a second voltage input and a switching transistor;
the control end of the switch transistor is electrically connected with the voltage output end of the voltage conversion chip, the th end of the switch transistor is electrically connected with the second voltage input end, and the second end of the switch transistor is used as the voltage control end of the voltage conversion chip.
4. The radio frequency amplifier of claim 3, wherein the switching transistor is a P-type transistor.
5. The radio frequency amplifier of claim 3, wherein the voltage conversion network further comprises a voltage divider sub-circuit;
an th input end of the voltage division sub-circuit is electrically connected with an output end of the bias power supply, a second input end of the voltage division sub-circuit is grounded, and an output end of the voltage division sub-circuit is electrically connected with a second voltage input end of the voltage conversion chip;
the voltage division sub-circuit is used for dividing the voltage output by the bias power supply and then inputting the divided voltage to the second voltage input end of the voltage conversion chip.
6. The RF amplifier of claim 5, wherein the voltage divider sub-circuit comprises a th voltage divider resistor and a second voltage divider resistor;
a th terminal of the th voltage-dividing resistor serves as a th input terminal of the voltage-dividing sub-circuit, a second terminal of the th voltage-dividing resistor is electrically connected to a th terminal of the second voltage-dividing resistor, a th terminal of the second voltage-dividing resistor serves as an output terminal of the voltage-dividing sub-circuit, and a second terminal of the second voltage-dividing resistor serves as a second input terminal of the voltage-dividing sub-circuit.
7. The radio frequency amplifier according to claim 2, wherein the control signal output circuit comprises an th transistor, a th resistor, a second resistor, a third resistor, and a th capacitor;
a terminal of the th resistor is used as a control signal input terminal of the control signal output circuit, and a second terminal of the th resistor is electrically connected with a control terminal of the th transistor;
the end of the th capacitor is electrically connected with the end of the th resistor, and the second end of the th capacitor is grounded;
a terminal of the th transistor is electrically connected to the terminal of the second resistor, and a second terminal of the th transistor is grounded;
the second end of the second resistor is electrically connected with the th end of the third resistor, the second end of the third resistor is electrically connected with the output end of the bias power supply, and the second end of the second resistor is used as the output end of the control signal output circuit.
8. The radio frequency amplifier of claim 1, further comprising a signal input, a signal output, an input matching network, and an output matching network;
the input end of the input matching network is electrically connected with the signal input end, and the output end of the input matching network is electrically connected with the input end of the depletion-mode amplifier device;
the input end of the output matching network is electrically connected with the output end of the depletion type amplifier device, and the output end of the output matching network is electrically connected with the signal output end.
9. The radio frequency amplifier of claim 1, wherein the control switch circuit is an th control switch, the th control switch includes a th terminal, a second terminal and a control terminal, the th control switch turns on or off between the th terminal and the second terminal according to a voltage of the control terminal;
the control terminal of the th control switch is used as the control terminal of the control switch circuit, the th control switch of the th control switch is used as the th terminal of the control switch circuit, and the second terminal of the th control switch is used as the second terminal of the control switch circuit.
10. The rf amplifier of claim 1, wherein the bias power supply is a dc power supply, and the bias power supply outputs a voltage greater than a voltage output by the output of the voltage conversion network.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810790550.6A CN110739918B (en) | 2018-07-18 | 2018-07-18 | Radio frequency amplifier |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810790550.6A CN110739918B (en) | 2018-07-18 | 2018-07-18 | Radio frequency amplifier |
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| CN110739918B CN110739918B (en) | 2022-09-02 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113824407A (en) * | 2021-11-23 | 2021-12-21 | 广州慧智微电子股份有限公司 | Protection circuit and protection method of power amplifier |
| CN116954297A (en) * | 2023-09-19 | 2023-10-27 | 深圳市思远半导体有限公司 | Power supply selection circuit and power supply |
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| CN106160673A (en) * | 2016-06-30 | 2016-11-23 | 唯捷创芯(天津)电子技术股份有限公司 | Harmonic suppressing method and corresponding low-noise amplifier, communication terminal |
| CN106341090A (en) * | 2016-07-26 | 2017-01-18 | 苏州能讯高能半导体有限公司 | Power amplifying circuit |
| CN108123685A (en) * | 2016-11-29 | 2018-06-05 | 意法半导体有限公司 | Adjusting to RF amplifiers |
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| CN106341090A (en) * | 2016-07-26 | 2017-01-18 | 苏州能讯高能半导体有限公司 | Power amplifying circuit |
| CN108123685A (en) * | 2016-11-29 | 2018-06-05 | 意法半导体有限公司 | Adjusting to RF amplifiers |
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| CN113824407A (en) * | 2021-11-23 | 2021-12-21 | 广州慧智微电子股份有限公司 | Protection circuit and protection method of power amplifier |
| CN113824407B (en) * | 2021-11-23 | 2022-02-15 | 广州慧智微电子股份有限公司 | Protection circuit and protection method of power amplifier |
| CN116954297A (en) * | 2023-09-19 | 2023-10-27 | 深圳市思远半导体有限公司 | Power supply selection circuit and power supply |
| CN116954297B (en) * | 2023-09-19 | 2023-12-15 | 深圳市思远半导体有限公司 | Power supply selection circuit and power supply |
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| CN110739918B (en) | 2022-09-02 |
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