Driver amplifier

Abstract

The present invention provides a driver amplifier comprising: a power distribution module, a common-source amplification module, a power synthesis module, a gate-drain feedback module, and a bias module; the first end of the power distribution module is respectively connected to the output end of the bias module and the first end of the gate-drain feedback module, and the second end of the power distribution module is connected to the first end of the common-source amplification module; the second end of the common-source amplification module is connected to the first end of the power synthesis module, and the second end of the power synthesis module is connected to the second end of the gate-drain feedback module; the power distribution module provides an input interface for the driver amplifier, and the power synthesis module provides an output interface for the driver amplifier. The driver amplifier provided by the present invention has lower circuit loss and better circuit stability.

Description

Technical Field

[0001] The present invention belongs to the technical field of chip design, and more particularly, relates to a driving amplifier. Background Art

[0002] The driver amplifier is located at the front end of the power amplifier. Its main function is to provide the power amplifier with sufficient power while ensuring the system linearity indicators and share the gain pressure of the power amplifier. If the gain and linearity of the driver amplifier are not enough, the performance of the final power amplifier will be greatly reduced. Therefore, the quality of the driver amplifier design directly affects the performance of the entire system.

[0003] Current driver amplifiers are often designed using GaAs HBT devices. Although GaAs HBT devices have advantages such as high linearity and high efficiency, they suffer from high losses and their stability needs to be improved. Summary of the Invention

[0004] An object of the present invention is to provide a driving amplifier to reduce circuit loss and improve circuit stability.

[0005] To achieve the above object, the present invention adopts the following technical solution: providing a driving amplifier, comprising:

[0006] Power distribution module, common source amplification module, power synthesis module, gate-drain feedback module and bias module;

[0007] The first end of the power distribution module is connected to the output end of the bias module and the first end of the gate-drain feedback module respectively, and the second end of the power distribution module is connected to the first end of the common-source amplification module; the second end of the common-source amplification module is connected to the first end of the power synthesis module, and the second end of the power synthesis module is connected to the second end of the gate-drain feedback module;

[0008] The power distribution module provides an input interface for the driving amplifier, and the power synthesis module provides an output interface for the driving amplifier;

[0009] The power distribution module receives an input signal, distributes the energy of the input signal, and transmits the input signal to the common-source amplification module; the common-source amplification module amplifies the input signal and transmits the amplified input signal to the power synthesis module; the power synthesis module synthesizes the energy of the amplified input signal and outputs the amplified input signal;

[0010] The bias module generates a bias current when the power is turned on, which is used to provide a DC bias for the common source amplifier module through the power distribution module; the gate-drain feedback module provides a negative feedback signal to the common source amplifier module through the power distribution module according to the output signal of the power synthesis module.

[0011] Optionally, the power distribution module includes a total distribution microstrip line, a first distribution unit, a second distribution unit and a total distribution resistor; the first end of the common source amplification module includes a first input end and a second input end;

[0012] The first end of the main distribution microstrip line provides an input interface of the driving amplifier, and the second end of the main distribution microstrip line is connected to the first end of the first distribution unit and the first end of the second distribution unit respectively;

[0013] The second end of the first distribution unit is connected to the first end of the total distribution resistor and the first input end of the common source amplification module respectively;

[0014] The second end of the second distribution unit is connected to the second end of the total distribution resistor and the second input end of the common-source amplification module respectively.

[0015] Optionally, the first distribution unit includes a first distribution microstrip line, a second distribution microstrip line, a third distribution microstrip line and a first distribution resistor; the first input end of the common source amplification module includes a first interface and a second interface;

[0016] The first end of the first distribution microstrip line is connected to the second end of the main distribution microstrip line, and the second end of the first distribution microstrip line is connected to the first end of the second distribution microstrip line and the first end of the third distribution microstrip line respectively;

[0017] The second end of the second distribution microstrip line is connected to the first end of the first distribution resistor, and the second end of the third distribution microstrip line is connected to the second end of the first distribution resistor;

[0018] The first end of the first distribution resistor is connected to the first interface of the common-source amplification module, and the second end of the first distribution resistor is connected to the first end of the total distribution resistor and the second interface of the common-source amplification module respectively.

[0019] Optionally, the second distribution unit includes a fourth distribution microstrip line, a fifth distribution microstrip line, a sixth distribution microstrip line and a second distribution resistor; the second input end of the common source amplification module includes a third interface and a fourth interface;

[0020] The first end of the fourth distribution microstrip line is connected to the second end of the main distribution microstrip line, and the second end of the fourth distribution microstrip line is connected to the first end of the fifth distribution microstrip line and the first end of the sixth distribution microstrip line respectively;

[0021] The second end of the fifth distribution microstrip line is connected to the first end of the second distribution resistor, and the second end of the sixth distribution microstrip line is connected to the second end of the second distribution resistor;

[0022] The first end of the second distribution resistor is connected to the second end of the total distribution resistor and the third interface of the common-source amplification module respectively, and the second end of the second distribution resistor is connected to the fourth interface of the common-source amplification module.

[0023] Optionally, the first end of the common-source amplification module includes a first interface, a second interface, a third interface, and a fourth interface, and the second end of the common-source amplification module includes a fifth interface, a sixth interface, a seventh interface, and an eighth interface;

[0024] The common source amplification module includes a first amplifying resistor, a second amplifying resistor, a third amplifying resistor, a fourth amplifying resistor, a first mirror tube, a second mirror tube, a third mirror tube, and a fourth mirror tube;

[0025] The first end of the first amplifying resistor is the first interface of the common-source amplifying module, and the second end of the first amplifying resistor is connected to the gate of the first mirror tube; the first end of the second amplifying resistor is the second interface of the common-source amplifying module, and the second end of the second amplifying resistor is connected to the gate of the second mirror tube; the first end of the third amplifying resistor is the third interface of the common-source amplifying module, and the second end of the third amplifying resistor is connected to the gate of the third mirror tube; the first end of the fourth amplifying resistor is the fourth interface of the common-source amplifying module, and the second end of the fourth amplifying resistor is connected to the gate of the fourth mirror tube;

[0026] The source of the first mirror tube, the source of the second mirror tube, the source of the third mirror tube, and the source of the fourth mirror tube are all grounded, the drain of the first mirror tube is the fifth interface of the common-source amplification module, the drain of the second mirror tube is the sixth interface of the common-source amplification module, the drain of the third mirror tube is the seventh interface of the common-source amplification module, and the drain of the fourth mirror tube is the eighth interface of the common-source amplification module.

[0027] Optionally, the power synthesis module includes a total synthesis resistor, a first synthesis unit, a second synthesis unit and a total synthesis microstrip line; the second end of the common source amplification module includes a first output end and a second output end;

[0028] The first end of the first synthesis unit is connected to the first end of the total synthesis resistor and the first output end of the common source amplifier module respectively, and the second end of the first synthesis unit is connected to the first end of the total synthesis microstrip line;

[0029] The first end of the second synthesis unit is connected to the second end of the total synthesis resistor and the second output end of the common source amplifier module respectively, and the second end of the second synthesis unit is connected to the first end of the total synthesis microstrip line;

[0030] The second end of the total synthesized microstrip line provides an output interface of the driving amplifier.

[0031] Optionally, the first synthesis unit includes a first synthesis resistor, a first synthesis microstrip line, a second synthesis microstrip line, and a third synthesis microstrip line; the first output end of the common source amplification module includes a fifth interface and a sixth interface;

[0032] The first end of the first synthetic resistor is connected to the fifth interface of the common-source amplifier module and the first end of the first synthetic microstrip line respectively;

[0033] The second end of the first synthetic resistor is respectively connected to the sixth interface of the common-source amplifier module, the first end of the second synthetic microstrip line, and the first end of the total synthetic resistor;

[0034] The second end of the first composite microstrip line and the second end of the second composite microstrip line are both connected to the first end of the third composite microstrip line, and the second end of the third composite microstrip line is connected to the first end of the overall composite microstrip line.

[0035] Optionally, the second synthesis unit includes a second synthesis resistor, a fourth synthesis microstrip line, a fifth synthesis microstrip line, and a sixth synthesis microstrip line; the second output end of the common source amplification module includes a seventh interface and an eighth interface;

[0036] The first end of the second synthetic resistor is respectively connected to the seventh interface of the common-source amplifier module, the first end of the fourth synthetic microstrip line, and the second end of the total synthetic resistor;

[0037] The second end of the second synthetic resistor is connected to the eighth interface of the common-source amplifier module and the first end of the fifth synthetic microstrip line respectively;

[0038] The second end of the fourth composite microstrip line and the second end of the fifth composite microstrip line are both connected to the first end of the sixth composite microstrip line, and the second end of the sixth composite microstrip line is connected to the first end of the overall composite microstrip line.

[0039] Optionally, the bias module includes a bias capacitor, a first bias resistor, a second bias resistor, a third bias resistor, a fifth mirror tube, and a sixth mirror tube;

[0040] The first end of the bias capacitor is grounded, and the second end of the bias capacitor is respectively connected to the second end of the first bias resistor, the drain of the fifth mirror tube, and the gate of the sixth mirror tube;

[0041] The source of the fifth mirror tube is grounded, and the gate of the fifth mirror tube is respectively connected to the source of the sixth mirror tube, the first end of the second bias resistor, and the first end of the third bias resistor;

[0042] The first end of the first bias resistor is connected to the first power supply, the drain of the sixth mirror tube is connected to the second power supply, the second end of the second bias resistor is grounded, and the second end of the third bias resistor is connected to the first end of the power distribution module.

[0043] Optionally, the gate-drain feedback module includes a feedback resistor and a feedback capacitor;

[0044] The first end of the feedback resistor is connected to the first end of the power distribution module, the second end of the feedback resistor is connected to the first end of the feedback capacitor, and the second end of the feedback capacitor is connected to the second end of the power synthesis module.

[0045] The beneficial effects of the driver amplifier provided by the embodiment of the present invention are as follows: compared with the prior art, on the one hand, the embodiment of the present invention provides a stable DC bias for the common-source amplifier module through the bias module, and improves the driving capability and gain flatness of the entire circuit through the gate-drain feedback module, thereby making the circuit more stable; on the other hand, the embodiment of the present invention distributes and synthesizes signal energy through the power distribution module and the power synthesis module, thereby effectively reducing circuit loss. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0047] Figure 1 A schematic structural diagram of a driving amplifier provided in one embodiment of the present invention;

[0048] Figure 2 A schematic structural diagram of a driving amplifier provided in another embodiment of the present invention;

[0049] Figure 3 A schematic structural diagram of a power distribution module provided in one embodiment of the present invention;

[0050] Figure 4 A schematic structural diagram of a power combining module provided in one embodiment of the present invention;

[0051] Figure 5This is a schematic diagram of an application of a driver amplifier provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0052] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0053] Please refer to Figure 1 , Figure 1 A schematic diagram of a driving amplifier according to an embodiment of the present invention is shown. A driving amplifier 100 includes:

[0054] A power distribution module 10 , a common-source amplification module 20 , a power synthesis module 30 , a gate-drain feedback module 40 and a bias module 50 .

[0055] The first end of the power distribution module 10 is connected to the output end of the bias module 50 and the first end of the gate-drain feedback module 40, respectively. The second end of the power distribution module 10 is connected to the first end of the common-source amplifier module 20. The second end of the common-source amplifier module 20 is connected to the first end of the power synthesis module 30, and the second end of the power synthesis module 30 is connected to the second end of the gate-drain feedback module 40.

[0056] The power distribution module 10 provides an input interface for the driver amplifier 100 , and the power combination module 30 provides an output interface for the driver amplifier 100 .

[0057] The power distribution module 10 receives an input signal, distributes the energy of the input signal, and transmits the input signal to the common-source amplifier module 20. The common-source amplifier module 20 amplifies the input signal and transmits the amplified input signal to the power synthesis module 30. The power synthesis module 30 synthesizes the energy of the amplified input signal and outputs the amplified input signal.

[0058] The bias module 50 generates a bias current when the power is turned on, which is used to provide a DC bias to the common-source amplifier module 20 through the power distribution module 10. The gate-drain feedback module 40 provides a negative feedback signal to the common-source amplifier module 20 through the power distribution module 10 based on the output signal of the power synthesis module 30.

[0059] In this embodiment, the power distribution module 10 and the power synthesis module 20 may use a microstrip line structure to achieve power distribution and synthesis.

[0060] In this embodiment, the common-source amplifier module 20 is used to amplify the input signal, thereby providing sufficient power for the final power amplifier. The gate width of the common-source amplifier module 20 can be determined through load-pull simulation. Considering the chip area of the driver amplifier and the transmission delay and loss of the microwave signal on the gate finger, the gate width of a single finger should not be too small or too large. The common-source amplifier module 20 in this embodiment can be implemented using two or four cells. A resistor is connected in series with the gate input of each cell to improve circuit stability. Each cell separately amplifies the input signal and outputs power through the power combiner module 30 connected to the drain.

[0061] In this embodiment, the gate-drain feedback module 40 can be implemented using a circuit structure with resistors and capacitors in series. This circuit structure saves chip area. Under the premise of meeting the gain specification of the driver amplifier, the gain flatness and circuit stability of the circuit can be effectively improved. In this embodiment, the circuit Q value can be reduced, the bandwidth can be expanded, and the gain flatness can be improved by setting a resistor. In this embodiment, if the chip area of the driver amplifier allows, a large-capacity capacitor can be used to improve the stability of the circuit at the low frequency end.

[0062] In this embodiment, the bias module 50 can use an active mirror bias structure with a negative feedback system to provide a stable DC bias for the common-source amplifier module 20. The introduction of the negative feedback system can effectively improve the driving capability of the driver amplifier, avoid circuit instability caused by the bias current being overly sensitive to temperature and supply voltage, and make the circuit more stable.

[0063] From the above description, it can be seen that, on the one hand, the embodiment of the present invention provides a stable DC bias for the common-source amplifier module through the bias module, and improves the driving capability and gain flatness of the entire circuit through the gate-drain feedback module, thereby making the circuit more stable; on the other hand, the embodiment of the present invention distributes and synthesizes signal energy through the power distribution module and the power synthesis module, effectively reducing circuit loss.

[0064] Optionally, refer to Figures 1 to 3 As a specific implementation of the driver amplifier provided by an embodiment of the present invention, the power distribution module 10 includes a total distribution microstrip line Z10, a first distribution unit 101, a second distribution unit 102, and a total distribution resistor R10. The first end of the common source amplifier module includes a first input end and a second input end.

[0065] The first end of the main distribution microstrip line Z10 provides an input interface of the driving amplifier, and the second end of the main distribution microstrip line Z10 is connected to the first end of the first distribution unit 101 and the first end of the second distribution unit 102 respectively.

[0066] The second end of the first distribution unit 101 is connected to the first end of the total distribution resistor R10 and the first input end of the common-source amplification module respectively.

[0067] The second end of the second distribution unit 102 is connected to the second end of the total distribution resistor R10 and the second input end of the common-source amplification module respectively.

[0068] In this embodiment, the first distribution unit 101 and the second distribution unit 102 are symmetrical in structure to ensure uniform distribution of the input signal power. Optionally, four distribution units can be set to perform power distribution. Figure 3 The structures shown are similar and will not be described here in detail.

[0069] Optionally, refer to Figures 1 to 3 As a specific implementation of the driver amplifier provided by an embodiment of the present invention, the first distribution unit 101 includes a first distribution microstrip line Z11, a second distribution microstrip line Z12, a third distribution microstrip line Z13, and a first distribution resistor R11. The first input end of the common source amplifier module includes a first interface and a second interface.

[0070] The first end of the first distribution microstrip line Z11 is connected to the second end of the main distribution microstrip line Z10 , and the second end of the first distribution microstrip line Z11 is connected to the first end of the second distribution microstrip line Z12 and the first end of the third distribution microstrip line Z13 .

[0071] A second end of the second distribution microstrip line Z12 is connected to a first end of the first distribution resistor R11 , and a second end of the third distribution microstrip line Z13 is connected to a second end of the first distribution resistor R11 .

[0072] A first end of the first distribution resistor R11 is connected to a first interface of the common-source amplifier module, and a second end of the first distribution resistor R11 is connected to a first end of the total distribution resistor R10 and a second interface of the common-source amplifier module respectively.

[0073] Optionally, refer to Figures 1 to 3 As a specific implementation of the driver amplifier provided by an embodiment of the present invention, the second distribution unit 102 includes a fourth distribution microstrip line Z14, a fifth distribution microstrip line Z15, a sixth distribution microstrip line Z16, and a second distribution resistor R12. The second input end of the common-source amplifier module includes a third interface and a fourth interface.

[0074] The first end of the fourth distribution microstrip line Z14 is connected to the second end of the main distribution microstrip line Z10 , and the second end of the fourth distribution microstrip line Z14 is connected to the first end of the fifth distribution microstrip line Z15 and the first end of the sixth distribution microstrip line Z16 .

[0075] A second end of the fifth distribution microstrip line Z15 is connected to a first end of the second distribution resistor R12 , and a second end of the sixth distribution microstrip line Z16 is connected to a second end of the second distribution resistor R12 .

[0076] The first end of the second distribution resistor R12 is connected to the second end of the total distribution resistor R10 and the third interface of the common-source amplifier module respectively, and the second end of the second distribution resistor R12 is connected to the fourth interface of the common-source amplifier module.

[0077] In this embodiment, the total distribution resistor R10 , the first distribution resistor R11 , and the second distribution resistor R12 are all balancing resistors.

[0078] In this embodiment, the resistance of the balancing resistor can be set to 10Ω.

[0079] As can be seen from the above description, compared to existing technologies, the embodiments of the present invention introduce balancing resistors to ensure the consistency of the amplitude and phase of the output signals of each distribution unit. Compared to existing technologies, the embodiments of the present invention utilize a microstrip line structure, which offers advantages such as wide bandwidth, simple structure, small area, and low loss. Furthermore, by introducing balancing resistors, the embodiments of the present invention ensure the consistency of the amplitude and phase of the input and output signals, effectively suppressing odd-mode oscillations and improving circuit stability.

[0080] Optionally, refer to Figures 1 to 2 As a specific implementation of the driving amplifier provided by an embodiment of the present invention, the first end of the common-source amplifier module includes a first interface, a second interface, a third interface and a fourth interface, and the second end of the common-source amplifier module includes a fifth interface, a sixth interface, a seventh interface and an eighth interface.

[0081] The common source amplifier module includes a first amplifying resistor R21, a second amplifying resistor R22, a third amplifying resistor R23, a fourth amplifying resistor R24, a first mirror tube M1, a second mirror tube M2, a third mirror tube M3, and a fourth mirror tube M4.

[0082] The first end of the first amplifying resistor R21 serves as the first interface of the common-source amplifying module, and the second end of the first amplifying resistor R21 is connected to the gate of the first mirror tube M1. The first end of the second amplifying resistor R22 serves as the second interface of the common-source amplifying module, and the second end of the second amplifying resistor R22 is connected to the gate of the second mirror tube M2. The first end of the third amplifying resistor R23 serves as the third interface of the common-source amplifying module, and the second end of the third amplifying resistor R23 is connected to the gate of the third mirror tube M3. The first end of the fourth amplifying resistor R24 serves as the fourth interface of the common-source amplifying module, and the second end of the fourth amplifying resistor R24 is connected to the gate of the fourth mirror tube M4.

[0083] The source of the first mirror tube M1, the source of the second mirror tube M2, the source of the third mirror tube M3, and the source of the fourth mirror tube M4 are all grounded. The drain of the first mirror tube M1 is the fifth interface of the common source amplifier module, the drain of the second mirror tube M2 is the sixth interface of the common source amplifier module, the drain of the third mirror tube M3 is the seventh interface of the common source amplifier module, and the drain of the fourth mirror tube M4 is the eighth interface of the common source amplifier module.

[0084] In this embodiment, a load-pull simulation can be performed based on the system gain and linearity of the driver amplifier to determine the total gate width of the common-source amplifier module. For example, based on the simulation results, the total gate width can be set to 4 mm.

[0085] In this embodiment, the gate width of a single finger can be determined based on the chip area of the driver amplifier and the transmission delay and loss of the microwave signal on the gate fingers. For example, based on the chip area of the driver amplifier and the transmission delay and loss of the microwave signal on the gate fingers, four single-cell dies are selected to implement signal amplification. Each single-cell die includes a mirror transistor and a resistor.

[0086] In this embodiment, the first amplifying resistor R21 , the second amplifying resistor R22 , the third amplifying resistor R23 , and the fourth amplifying resistor R24 are all stable resistors.

[0087] In this embodiment, the resistance of the stabilizing resistor can be set to 5Ω.

[0088] In this embodiment, the size of the mirror tubes M1 to M4 can be set to 10×100 μm.

[0089] In this embodiment, stabilizing resistors R21, R22, R23, and R24 are connected in series to the gate of each unit cell to improve the absolute stability of the circuit over the entire frequency band.

[0090] Optionally, refer to Figures 1 to 4 As a specific implementation of the driver amplifier provided by an embodiment of the present invention, the power combining module 30 includes a total combined resistor R30, a first combining unit 301, a second combining unit 302, and a total combined microstrip line Z30. The second end of the common source amplifier module includes a first output end and a second output end.

[0091] The first end of the first combining unit 301 is connected to the first end of the total combined resistor R30 and the first output end of the common source amplifier module respectively, and the second end of the first combining unit 301 is connected to the first end of the total combined microstrip line Z30.

[0092] The first end of the second combining unit 302 is connected to the second end of the total combined resistor R30 and the second output end of the common source amplifier module respectively, and the second end of the second combining unit 302 is connected to the first end of the total combined microstrip line Z30.

[0093] The second end of the total synthesized microstrip line Z30 provides an output interface of the driver amplifier.

[0094] In this embodiment, the first synthesis unit 301 and the second synthesis unit 302 are symmetrical in structure to correspond to the power distribution module 10, thereby ensuring uniform distribution and synthesis of the input signal power. Optionally, if four distribution units are set to perform power distribution, then four synthesis units can be set to perform power synthesis, and the structure is the same as Figure 3 The structures shown are similar and will not be described here in detail.

[0095] Optionally, refer to Figures 1 to 4 As a specific implementation of the driver amplifier provided by an embodiment of the present invention, the first synthesizing unit 301 includes a first synthesized resistor R31, a first synthesized microstrip line Z31, a second synthesized microstrip line Z32, and a third synthesized microstrip line Z33. The first output end of the common-source amplification module includes a fifth interface and a sixth interface.

[0096] The first end of the first synthetic resistor R31 is connected to the fifth interface of the common-source amplifier module and the first end of the first synthetic microstrip line Z31 respectively.

[0097] The second end of the first synthetic resistor R31 is respectively connected to the sixth interface of the common-source amplifier module, the first end of the second synthetic microstrip line Z32, and the first end of the total synthetic resistor R30.

[0098] The second end of the first composite microstrip line Z31 and the second end of the second composite microstrip line Z32 are both connected to the first end of the third composite microstrip line Z33, and the second end of the third composite microstrip line Z33 is connected to the first end of the overall composite microstrip line Z30.

[0099] Optionally, refer to Figures 1 to 4 As a specific implementation of the driver amplifier provided by an embodiment of the present invention, the second synthesizing unit 302 includes a second synthesized resistor R32, a fourth synthesized microstrip line Z34, a fifth synthesized microstrip line Z35, and a sixth synthesized microstrip line Z36. The second output end of the common-source amplifier module includes a seventh interface and an eighth interface.

[0100] The first end of the second combined resistor R32 is respectively connected to the seventh interface of the common-source amplifier module, the first end of the fourth combined microstrip line Z34, and the second end of the total combined resistor R30.

[0101] The second end of the second synthetic resistor R32 is connected to the eighth interface of the common-source amplifier module and the first end of the fifth synthetic microstrip line Z35 respectively.

[0102] The second end of the fourth composite microstrip line Z34 and the second end of the fifth composite microstrip line Z35 are both connected to the first end of the sixth composite microstrip line Z36, and the second end of the sixth composite microstrip line Z36 is connected to the first end of the overall composite microstrip line Z30.

[0103] In this embodiment, the total combined resistor R30 , the first combined resistor R31 , and the second combined resistor R32 are all balancing resistors.

[0104] In this embodiment, the resistance of the balancing resistor can be set to 10Ω.

[0105] As can be seen from the above description, compared to the prior art, the embodiments of the present invention introduce balancing resistors to ensure the consistency of the amplitude and phase of the output signals of each synthesis unit. Compared to the prior art, the embodiments of the present invention utilize a microstrip line structure, which offers advantages such as wide bandwidth, simple structure, small area, and low loss. Furthermore, by introducing balancing resistors, the embodiments of the present invention ensure the consistency of the amplitude and phase of the input and output signals, effectively suppressing odd-mode oscillations and improving circuit stability.

[0106] Optionally, refer to Figures 1 to 2 As a specific implementation of the driving amplifier provided by an embodiment of the present invention, the bias module 50 includes a bias capacitor C50, a first bias resistor R51, a second bias resistor R52, a third bias resistor R53, a fifth mirror tube M5, and a sixth mirror tube M6.

[0107] A first end of the bias capacitor C50 is grounded, and a second end of the bias capacitor C50 is respectively connected to the second end of the first bias resistor R51, the drain of the fifth mirror tube M5, and the gate of the sixth mirror tube M6.

[0108] The source of the fifth mirror tube M5 is grounded, and the gate of the fifth mirror tube M5 is connected to the source of the sixth mirror tube M6, the first end of the second bias resistor R52, and the first end of the third bias resistor R53 respectively.

[0109] The first end of the first bias resistor R51 is connected to the first power supply, the drain of the sixth mirror tube M6 is connected to the second power supply, the second end of the second bias resistor R52 is grounded, and the second end of the third bias resistor R53 is connected to the first end of the power distribution module.

[0110] Compared to the prior art, this embodiment introduces a negative feedback system: mirror transistor M5 provides bias current for common-source amplifier module 20. M5 changes the bias current through its gate voltage, thereby controlling the gate voltage of M6. M6, in turn, controls the gate voltage of M5 through R52, forming a negative feedback system. The introduction of a negative feedback system effectively improves the drive capability of the driver amplifier, avoids circuit instability caused by bias current being overly sensitive to temperature and supply voltage, and thus improves circuit stability.

[0111] In this embodiment, the size of M5 can be set to 4×50μm, the size of M6 can be set to 2×50μm, and R52 can be set to 100Ω. The bias capacitor C50 is a filter capacitor used to filter out high-frequency clutter. The value of the bias capacitor C50 can be set to 10pF. R53 is used to suppress crosstalk and can be set to 500Ω. The bias resistor R51 is external, and the bias current can be adjusted by adjusting the value of the bias resistor R51, so that the circuit works in the best state. Among them, R51 can be set to 1.8KΩ, and the corresponding circuit static operating current is 130mA.

[0112] Optionally, refer to Figures 1 to 2 As a specific implementation of the driving amplifier provided by an embodiment of the present invention, the gate-drain feedback module includes a feedback resistor R40 and a feedback capacitor C40.

[0113] A first end of the feedback resistor R40 is connected to a first end of the power distribution module, a second end of the feedback resistor R40 is connected to a first end of the feedback capacitor C40, and a second end of the feedback capacitor C40 is connected to a second end of the power synthesis module.

[0114] In this embodiment, the feedback resistor R40 may be set to 1.5KΩ, and the feedback capacitor C40 may be set to 20pF.

[0115] In this embodiment, the gain flatness of the circuit and the stability of the low-frequency end of the circuit can be improved by adjusting the values of the feedback resistor R40 and the feedback capacitor C40.

[0116] Optionally, refer to Figure 5 As a specific implementation of the driving amplifier provided in an embodiment of the present invention, the embodiment of the present invention also provides a peripheral structure of the driving amplifier.

[0117] In this embodiment, the input end (i.e., the input matching circuit) adopts an L-type matching network, in which the series and parallel capacitances are both 1.2pF, and the series resistance is 2.7Ω. The output end (i.e., the output matching network) also adopts an L-type matching network, in which the series capacitance is 3pF and the parallel capacitance is 0.8pF. The characteristic impedance Z0 of the microstrip line at both the input and output ends is 50Ω. The external bias resistor is 1.8KΩ, the feed inductor is 18nH, and the two power supply decoupling capacitors are 1uF and 100pF, respectively. Other application frequency bands can be achieved by selecting appropriate input matching circuit and output matching circuit schemes. The embodiments of the present invention can be applied to fifth-generation mobile communication base stations and can meet the application requirements of different frequency bands of 5G communication systems.

[0118] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in the present invention, and such modifications or substitutions are intended to be within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be subject to the scope of protection of the claims.

Claims

1. A driver amplifier, characterized in that: include: Power distribution module, common source amplification module, power synthesis module, gate-drain feedback module and bias module; The first end of the power distribution module is connected to the output end of the bias module and the first end of the gate-drain feedback module respectively, and the second end of the power distribution module is connected to the first end of the common-source amplification module; the second end of the common-source amplification module is connected to the first end of the power synthesis module, and the second end of the power synthesis module is connected to the second end of the gate-drain feedback module; The power distribution module provides an input interface for the driving amplifier, and the power synthesis module provides an output interface for the driving amplifier; The power distribution module receives an input signal, distributes the energy of the input signal, and transmits the input signal to the common-source amplification module; the common-source amplification module amplifies the input signal and transmits the amplified input signal to the power synthesis module; the power synthesis module synthesizes the energy of the amplified input signal and outputs the amplified input signal; The bias module generates a bias current when the power is turned on, and is used to provide a DC bias to the common source amplifier module through the power distribution module; the gate-drain feedback module provides a negative feedback signal to the common source amplifier module through the power distribution module according to the output signal of the power synthesis module; The bias module includes a bias capacitor, a first bias resistor, a second bias resistor, a third bias resistor, a fifth mirror tube, and a sixth mirror tube; The first end of the bias capacitor is grounded, and the second end of the bias capacitor is respectively connected to the second end of the first bias resistor, the drain of the fifth mirror tube, and the gate of the sixth mirror tube; The source of the fifth mirror tube is grounded, and the gate of the fifth mirror tube is respectively connected to the source of the sixth mirror tube, the first end of the second bias resistor, and the first end of the third bias resistor; The first end of the first bias resistor is connected to the first power supply, the drain of the sixth mirror tube is connected to the second power supply, the second end of the second bias resistor is grounded, and the second end of the third bias resistor is connected to the first end of the power distribution module.

2. The driver amplifier according to claim 1, wherein: The power distribution module includes a total distribution microstrip line, a first distribution unit, a second distribution unit and a total distribution resistor; the first end of the common source amplification module includes a first input end and a second input end; The first end of the main distribution microstrip line provides an input interface of the driving amplifier, and the second end of the main distribution microstrip line is connected to the first end of the first distribution unit and the first end of the second distribution unit respectively; The second end of the first distribution unit is connected to the first end of the total distribution resistor and the first input end of the common source amplification module respectively; The second end of the second distribution unit is connected to the second end of the total distribution resistor and the second input end of the common-source amplification module respectively.

3. The driver amplifier according to claim 2, wherein: The first distribution unit includes a first distribution microstrip line, a second distribution microstrip line, a third distribution microstrip line and a first distribution resistor; the first input end of the common source amplification module includes a first interface and a second interface; The first end of the first distribution microstrip line is connected to the second end of the main distribution microstrip line, and the second end of the first distribution microstrip line is connected to the first end of the second distribution microstrip line and the first end of the third distribution microstrip line respectively; The second end of the second distribution microstrip line is connected to the first end of the first distribution resistor, and the second end of the third distribution microstrip line is connected to the second end of the first distribution resistor; The first end of the first distribution resistor is connected to the first interface of the common-source amplification module, and the second end of the first distribution resistor is connected to the first end of the total distribution resistor and the second interface of the common-source amplification module respectively.

4. The driver amplifier according to claim 2, wherein: The second distribution unit includes a fourth distribution microstrip line, a fifth distribution microstrip line, a sixth distribution microstrip line and a second distribution resistor; the second input end of the common source amplification module includes a third interface and a fourth interface; The first end of the fourth distribution microstrip line is connected to the second end of the main distribution microstrip line, and the second end of the fourth distribution microstrip line is connected to the first end of the fifth distribution microstrip line and the first end of the sixth distribution microstrip line respectively; The second end of the fifth distribution microstrip line is connected to the first end of the second distribution resistor, and the second end of the sixth distribution microstrip line is connected to the second end of the second distribution resistor; The first end of the second distribution resistor is connected to the second end of the total distribution resistor and the third interface of the common-source amplification module respectively, and the second end of the second distribution resistor is connected to the fourth interface of the common-source amplification module.

5. The driver amplifier according to claim 1, wherein: The first end of the common-source amplification module includes a first interface, a second interface, a third interface, and a fourth interface, and the second end of the common-source amplification module includes a fifth interface, a sixth interface, a seventh interface, and an eighth interface; The common source amplification module includes a first amplifying resistor, a second amplifying resistor, a third amplifying resistor, a fourth amplifying resistor, a first mirror tube, a second mirror tube, a third mirror tube, and a fourth mirror tube; The first end of the first amplifying resistor is the first interface of the common-source amplifying module, and the second end of the first amplifying resistor is connected to the gate of the first mirror tube; the first end of the second amplifying resistor is the second interface of the common-source amplifying module, and the second end of the second amplifying resistor is connected to the gate of the second mirror tube; the first end of the third amplifying resistor is the third interface of the common-source amplifying module, and the second end of the third amplifying resistor is connected to the gate of the third mirror tube; the first end of the fourth amplifying resistor is the fourth interface of the common-source amplifying module, and the second end of the fourth amplifying resistor is connected to the gate of the fourth mirror tube; The source of the first mirror tube, the source of the second mirror tube, the source of the third mirror tube, and the source of the fourth mirror tube are all grounded, the drain of the first mirror tube is the fifth interface of the common-source amplification module, the drain of the second mirror tube is the sixth interface of the common-source amplification module, the drain of the third mirror tube is the seventh interface of the common-source amplification module, and the drain of the fourth mirror tube is the eighth interface of the common-source amplification module.

6. The driver amplifier according to claim 1, wherein: The power synthesis module includes a total synthesis resistor, a first synthesis unit, a second synthesis unit and a total synthesis microstrip line; the second end of the common source amplification module includes a first output end and a second output end; The first end of the first synthesis unit is connected to the first end of the total synthesis resistor and the first output end of the common source amplifier module respectively, and the second end of the first synthesis unit is connected to the first end of the total synthesis microstrip line; The first end of the second synthesis unit is connected to the second end of the total synthesis resistor and the second output end of the common source amplifier module respectively, and the second end of the second synthesis unit is connected to the first end of the total synthesis microstrip line; The second end of the total synthesized microstrip line provides an output interface of the driving amplifier.

7. The driver amplifier according to claim 6, wherein: The first synthesis unit includes a first synthesis resistor, a first synthesis microstrip line, a second synthesis microstrip line, and a third synthesis microstrip line; the first output end of the common source amplification module includes a fifth interface and a sixth interface; The first end of the first synthetic resistor is connected to the fifth interface of the common-source amplifier module and the first end of the first synthetic microstrip line respectively; The second end of the first synthetic resistor is respectively connected to the sixth interface of the common-source amplifier module, the first end of the second synthetic microstrip line, and the first end of the total synthetic resistor; The second end of the first composite microstrip line and the second end of the second composite microstrip line are both connected to the first end of the third composite microstrip line, and the second end of the third composite microstrip line is connected to the first end of the overall composite microstrip line.

8. The driver amplifier according to claim 6, wherein: The second synthesis unit includes a second synthesis resistor, a fourth synthesis microstrip line, a fifth synthesis microstrip line, and a sixth synthesis microstrip line; the second output end of the common source amplification module includes a seventh interface and an eighth interface; The first end of the second synthetic resistor is respectively connected to the seventh interface of the common-source amplifier module, the first end of the fourth synthetic microstrip line, and the second end of the total synthetic resistor; The second end of the second synthetic resistor is connected to the eighth interface of the common-source amplifier module and the first end of the fifth synthetic microstrip line respectively; The second end of the fourth composite microstrip line and the second end of the fifth composite microstrip line are both connected to the first end of the sixth composite microstrip line, and the second end of the sixth composite microstrip line is connected to the first end of the overall composite microstrip line.

9. The driver amplifier according to claim 1, wherein: The gate-drain feedback module includes a feedback resistor and a feedback capacitor; The first end of the feedback resistor is connected to the first end of the power distribution module, the second end of the feedback resistor is connected to the first end of the feedback capacitor, and the second end of the feedback capacitor is connected to the second end of the power synthesis module.

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