A power amplifier, chip, and device

Abstract

This invention discloses a power amplifier, chip, and device, belonging to the field of mobile communications. The amplifier includes first and second amplification circuits and a coupling inductor network, supporting differential / common-mode dual-mode operation: In differential mode, millimeter-wave signals are fed into the amplification circuit via the coupling inductor, amplified, and differentially output from the output coupling inductor; in common-mode mode, low-frequency signals are injected into the center tap of the coupling inductor via a common-mode input matching circuit, amplified, and power-combined at the center tap of the output coupling inductor, then output single-ended via a common-mode output matching circuit. A single chip covers millimeter-wave and low-frequency bands, is small in size, and highly efficient, making it suitable for multi-band communication terminals.

Description

Technical Field

[0001] This invention relates to the field of mobile communications, and more particularly to a power amplifier, chip, and device. Background Technology

[0002] With the development of wireless communication technology, the communication capacity of modern communication systems is constantly increasing. Meanwhile, to achieve high data rate communication, 5G communication technology is being steadily advanced. The 5G communication frequency bands mainly include Sub-6GHz and millimeter-wave bands. The Sub-6GHz band has advantages such as strong signal penetration and wide coverage. The 5G millimeter-wave band has a wider bandwidth, thus offering higher transmission rates. The spectrum resources for 5G millimeter-wave bands have been largely allocated in various countries, mainly concentrated in the 28GHz and 39GHz bands.

[0003] Currently, wireless communication devices are evolving towards multi-functional integration, achieving high-efficiency communication through multiple voice or data protocols. The solution for realizing such multi-functional wireless terminals (cellular communication, WLAN, positioning, etc.) is a multi-standard radio frequency (RF) system. This necessitates a significant shift from single-carrier wireless systems to adaptive wireless communication systems capable of effectively handling multiple frequency bands and functions. Against this backdrop, integrated multi-mode, multi-band RF front-end circuits and transceiver systems have attracted widespread attention. Compared to single-mode, single-band solutions, multi-mode, multi-band systems can provide a wider communication range and higher data throughput, effectively reducing system costs and improving system functionality.

[0004] To reduce the cost of radio frequency transceiver systems, dual-band and multi-band transceiver systems have become a research hotspot. Power amplifiers are the core modules of 5G multi-band wireless transmission systems. Currently, multi-band reconfigurability of power amplifiers is achieved through reconfigurable inductors and capacitors, which inevitably introduces losses, thereby reducing the efficiency of the power amplifier. Summary of the Invention

[0005] In order to at least partially solve one of the technical problems existing in the prior art, the present invention aims to provide a power amplifier, chip and device covering the Sub6GHz and millimeter wave frequency bands.

[0006] The first technical solution adopted in this invention is:

[0007] A power amplifier includes: a first amplification circuit, a second amplification circuit, a first coupling inductor, a second coupling inductor, a third coupling inductor, a fourth coupling inductor, a common-mode input matching circuit, a common-mode output matching circuit, and a feedback path;

[0008] The first amplifier circuit and the second amplifier circuit are used to amplify different frequency bands of millimeter wave radio frequency signals in differential mode, and to amplify lower frequency band radio frequency signals in common mode.

[0009] Millimeter-wave radio frequency differential signals of different frequency bands are respectively amplified by the first coupling inductor and the third coupling inductor, and then by the first amplifier circuit and the second amplifier circuit. The amplified signals are then output via the second coupling inductor and the fourth coupling inductor.

[0010] The lower frequency RF common-mode signal enters the center tap of the secondary coil of the first coupling inductor and the third coupling inductor through the common-mode input matching circuit, and is sent to the first amplifier circuit and the second amplifier circuit for signal amplification. The amplified signal is then combined with power before common-mode output matching through the center tap of the primary coil of the second coupling inductor and the fourth coupling inductor, and is then output via RF through the common-mode output matching circuit. The feedback path is used to stabilize the common-mode path.

[0011] Furthermore, one end of the primary coil of the first coupled inductor serves as the first input terminal of the differential signal, and the other end is grounded; the two ends of the secondary coil of the first coupled inductor are respectively connected to the two input terminals of the first amplifier circuit.

[0012] The two output terminals of the first amplifier circuit are respectively connected to the two ends of the primary coil of the second coupled inductor; one end of the secondary coil of the second coupled inductor serves as the first output terminal of the differential signal, and the other end is grounded;

[0013] One end of the primary coil of the third coupling inductor serves as the second input terminal of the differential signal, and the other end is grounded; the two ends of the secondary coil of the third coupling inductor are respectively connected to the two input terminals of the second amplifier circuit.

[0014] The two output terminals of the second amplifier circuit are respectively connected to the two ends of the primary coil of the fourth coupling inductor; one end of the secondary coil of the fourth coupling inductor serves as the first output terminal of the differential signal, and the other end is grounded;

[0015] The input terminal of the common-mode input matching circuit serves as the input terminal of the common-mode signal. The first output terminal is connected to the center tap of the secondary coil of the first coupled inductor, the second output terminal is connected to the center tap of the secondary coil of the third coupled inductor, and the third output terminal is connected to one end of the feedback path.

[0016] The input terminals of the common-mode output matching circuit are all connected to the center tap of the primary coil of the third coupling inductor, the center tap of the primary coil of the fourth coupling inductor, and the other end of the feedback path. The output terminal of the common-mode output matching circuit serves as the output terminal of the common-mode signal.

[0017] Furthermore, the first amplifier circuit includes a first transistor, a second transistor, a third transistor, a fourth transistor, a sixth resistor, a fourth capacitor, a fifth capacitor, an eleventh capacitor, and a twelfth capacitor;

[0018] The gate of the first transistor serves as the first input terminal of the first amplifier circuit, the source is grounded, and the drain is connected to the source of the third transistor.

[0019] The gate of the second transistor serves as the second input terminal of the first amplifier circuit, the source is grounded, and the drain is connected to the source of the fourth transistor.

[0020] One end of the fourth capacitor is connected to the gate of the first transistor, and the other end is connected to the drain of the second transistor; one end of the fifth capacitor is connected to the gate of the second transistor, and the other end is connected to the drain of the first transistor.

[0021] The gate of the third transistor is connected to one end of the sixth resistor, and the drain serves as the first output terminal of the first amplifier circuit; the gate of the fourth transistor is connected to one end of the sixth resistor, and the drain serves as the second output terminal of the first amplifier circuit; the other end of the sixth resistor is connected to the first bias voltage.

[0022] One end of the eleventh capacitor is connected to the source of the third transistor, and the other end is connected to the drain of the fourth transistor.

[0023] One end of the twelfth capacitor is connected to the source of the fourth transistor, and the other end is connected to the drain of the third transistor.

[0024] Furthermore, the first amplification circuit also includes a harmonic control circuit, which includes a second inductor, a third inductor, and an eighth capacitor;

[0025] One end of the second inductor is connected to the source of the third transistor, and the other end is connected to one end of the third inductor; the other end of the third inductor is connected to the source of the fourth transistor; one end of the eighth capacitor is connected to the connection point of the second and third inductors, and the other end is grounded.

[0026] Furthermore, the second amplifier circuit includes a fifth transistor, a sixth transistor, a seventh transistor, an eighth transistor, a third resistor, a fourth resistor, an eighth resistor, a sixth capacitor, a seventh capacitor, a thirteenth capacitor, and a fourteenth capacitor;

[0027] The gate of the fifth transistor serves as the first input terminal of the second amplifier circuit, the source is grounded, and the drain is connected to the source of the seventh transistor.

[0028] The gate of the sixth transistor serves as the second input terminal of the second amplifier circuit, the source is grounded, and the drain is connected to the source of the eighth transistor.

[0029] The third resistor and the fourth resistor are connected in series between the gate of the fifth transistor and the gate of the sixth transistor, and the connection point of the third resistor and the fourth resistor is connected to the second bias voltage.

[0030] One end of the sixth capacitor is connected to the gate of the fifth transistor, and the other end is connected to the drain of the seventh transistor; one end of the seventh capacitor is connected to the gate of the sixth transistor, and the other end is connected to the drain of the fifth transistor.

[0031] The gate of the seventh transistor is connected to one end of the eighth resistor, and its drain serves as the first output terminal of the second amplifier circuit; the gate of the eighth transistor is connected to one end of the sixth resistor, and its drain serves as the second output terminal of the second amplifier circuit; the other end of the sixth resistor is connected to the third bias voltage.

[0032] One end of the thirteenth capacitor is connected to the source of the seventh transistor, and the other end is connected to the drain of the eighth transistor.

[0033] One end of the fourteenth capacitor is connected to the source of the eighth transistor, and the other end is connected to the drain of the seventh transistor.

[0034] Furthermore, the second amplifier circuit also includes a harmonic control circuit, which includes a fourth inductor, a fifth inductor, and a tenth capacitor;

[0035] One end of the fourth inductor is connected to the source of the seventh transistor, and the other end is connected to one end of the fifth inductor; the other end of the fifth inductor is connected to the source of the eighth transistor; one end of the tenth capacitor is connected to the connection point of the fourth and fifth inductors, and the other end is grounded.

[0036] Furthermore, the common-mode input matching circuit includes a first capacitor, a second capacitor, a first inductor, a first resistor, and a second resistor;

[0037] One end of the first capacitor serves as the input terminal of the common-mode input matching circuit, and the other end is connected to one end of the first inductor; the other end of the first inductor is connected to one end of the feedback path.

[0038] One end of the second capacitor is connected to the other end of the first capacitor, and the other end is grounded;

[0039] One end of the first resistor is connected to the other end of the first inductor, and the other end is connected to the center tap of the secondary coil of the first coupled inductor;

[0040] One end of the second resistor is connected to the other end of the first inductor, and the other end is connected to the center tap of the secondary coil of the third coupled inductor through the third capacitor.

[0041] Furthermore, the power amplifier also includes a fifth resistor, one end of which is connected to the other end of the first inductor, and the other end is connected to a bias voltage to provide bias for the first amplifier circuit.

[0042] Furthermore, the common-mode output matching circuit includes a sixth inductor, a seventh inductor, a fifteenth capacitor, a sixteenth capacitor, and a seventeenth capacitor;

[0043] One end of the fifteenth capacitor serves as the input terminal of the common-mode output matching circuit, and the other end is connected to one end of the seventh inductor; the other end of the seventh inductor is connected to one end of the seventeenth capacitor; the other end of the seventeenth capacitor serves as the output terminal of the common-mode output matching circuit.

[0044] One end of the sixth inductor is connected to one end of the fifteenth capacitor, and the other end is connected to the power supply.

[0045] One end of the sixteenth capacitor is connected to the other end of the seventh inductor, and the other end is grounded.

[0046] Furthermore, the feedback path includes a seventh resistor and a ninth capacitor;

[0047] One end of the seventh resistor serves as one end of the feedback path, and the other end is connected to one end of the ninth capacitor; the other end of the ninth capacitor serves as the other end of the feedback path.

[0048] The second technical solution adopted in this invention is:

[0049] A chip comprising a power amplifier as described above.

[0050] The third technical solution adopted in this invention is:

[0051] A communication device includes a housing and a peripheral circuit board, wherein the peripheral circuit board includes the chip described above.

[0052] The beneficial effects of this invention are as follows: This invention achieves the design of a three-mode power amplifier (Sub6GHz, 28GHz, 39GHz) without introducing additional losses, amplifying 28GHz and 39GHz differential-mode signals in differential mode. In Sub6GHz, power combining is used to amplify common-mode signals, and harmonic control circuitry is used to improve circuit linearity, covering the Sub6GHz band and the 28GHz and 39GHz millimeter-wave bands within the 5G frequency band. Attached Figure Description

[0053] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following description is provided with accompanying drawings of the relevant technical solutions in the embodiments of the present invention or the prior art. It should be understood that the accompanying drawings described below are only for the purpose of clearly illustrating some embodiments of the technical solutions of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0054] Figure 1This is a schematic diagram of the three-mode power amplifier in Embodiment 1 of the present invention;

[0055] Figure 2 This is a circuit diagram of the first amplifier circuit in Embodiment 1 of the present invention;

[0056] Figure 3 This is a circuit diagram of the second amplifier circuit in Embodiment 1 of the present invention;

[0057] Figure 4 This is a detailed circuit diagram of the three-mode power amplifier in Embodiment 1 of the present invention;

[0058] Figure 5 These are simulation results of the three-mode power amplifier in Embodiment 1 of the present invention at Sub6GHz; wherein, (a) is the S-parameter simulation result at Sub6GHz; and (b) is the power and efficiency simulation result at Sub6GHz.

[0059] Figure 6 These are simulation results of the three-mode power amplifier at 28GHz in Embodiment 1 of the present invention; wherein, (a) is the S-parameter simulation result at 28GHz; and (b) is the power and efficiency simulation result at 28GHz.

[0060] Figure 7 These are simulation results of the three-mode power amplifier at 39GHz in Embodiment 1 of the present invention; wherein, (a) is the S-parameter simulation result at 39GHz; and (b) is the power and efficiency simulation result at 39GHz.

[0061] Figure 8 This is a circuit diagram of the first amplifier circuit and the second amplifier circuit in Embodiment 2 of the present invention;

[0062] Figure 9 This is a circuit diagram of the harmonic control circuit in Embodiment 3 of the present invention;

[0063] Figure 10 This is a circuit diagram of the common-mode input matching circuit in Embodiment 4 of the present invention;

[0064] Figure 11 This is a circuit diagram of the common-mode output matching circuit in Embodiment 5 of the present invention. Detailed Implementation

[0065] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application. The step numbers in the following embodiments are set only for ease of explanation, and there is no limitation on the order between the steps. The execution order of each step in the embodiments can be adaptively adjusted according to the understanding of those skilled in the art.

[0066] The terminology used in the embodiments of this application is for the purpose of describing specific embodiments only and is not intended to limit the embodiments of this application. The singular forms "a," "described," and "the" used in the embodiments of this application and the appended claims are also intended to include the plural forms, unless the context clearly indicates otherwise. Furthermore, unless otherwise expressly limited, terms such as "set," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0067] In the description of this application, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0068] In the description of this application, "several" means one or more, "more than" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0069] In the description of this application, "and / or" describes the relationship between related objects, indicating that there can be three relationships. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone. The character " / " generally indicates that the related objects before and after it are in an "or" relationship.

[0070] Example 1

[0071] like Figure 1As shown in the figure, an embodiment of the present invention proposes a three-mode power amplifier, including: a first amplifier circuit, a second amplifier circuit, a first coupling inductor TF1, a second coupling inductor TF2, a third coupling inductor TF3, a fourth coupling inductor TF4, a common-mode input matching circuit, a common-mode output matching circuit, and a feedback path.

[0072] The first and second amplifier circuits are used to amplify different frequency bands of millimeter-wave radio frequency signals in differential mode and to amplify lower frequency band radio frequency signals in common-mode mode. The millimeter-wave radio frequency differential signals of different frequency bands are amplified by the first coupling inductor TF1 and then output via the second coupling inductor TF2. They are amplified by the third coupling inductor TF3 and then output via the fourth coupling inductor TF4.

[0073] The lower-frequency RF common-mode signal passes through the common-mode input matching circuit and enters the center taps of the secondary coils of the first coupling inductor TF1 and the third coupling inductor TF3, then is sent to the first amplifier circuit and the second amplifier circuit for signal amplification. Power combining is then achieved through the center taps of the primary coils of the second coupling inductor TF2 and the fourth coupling inductor TF4 before common-mode output matching, and finally, the signal is output via RF after common-mode output matching. The feedback path is used to stabilize the common-mode path.

[0074] As an optional implementation method, see [link to implementation details]. Figure 1 The connection methods of each module in the power amplifier are as follows:

[0075] One end of the primary coil of the first coupling inductor TF1 serves as the first input terminal of the differential signal, and the other end is grounded; the two ends of the secondary coil of the first coupling inductor TF1 are respectively connected to the two input terminals of the first amplifier circuit.

[0076] The two output terminals of the first amplifier circuit are respectively connected to the two ends of the primary coil of the second coupling inductor TF2; one end of the secondary coil of the second coupling inductor TF2 serves as the first output terminal of the differential signal, and the other end is grounded;

[0077] One end of the primary coil of the third coupling inductor TF3 serves as the second input terminal of the differential signal, and the other end is grounded; the two ends of the secondary coil of the third coupling inductor TF3 are respectively connected to the two input terminals of the second amplifier circuit.

[0078] The two output terminals of the second amplifier circuit are respectively connected to the two ends of the primary coil of the fourth coupling inductor TF4; one end of the secondary coil of the fourth coupling inductor TF4 serves as the first output terminal of the differential signal, and the other end is grounded.

[0079] The input terminal of the common-mode input matching circuit serves as the input terminal of the common-mode signal. The first output terminal is connected to the center tap of the secondary coil of the first coupling inductor TF1, the second output terminal is connected to the center tap of the secondary coil of the third coupling inductor TF3, and the third output terminal is connected to one end of the feedback path.

[0080] The input terminals of the common-mode output matching circuit are all connected to the center tap of the primary coil of the third coupling inductor TF3, the center tap of the primary coil of the fourth coupling inductor TF4, and the other end of the feedback path. The output terminal of the common-mode output matching circuit serves as the output terminal of the common-mode signal.

[0081] As an optional implementation method, see [link to implementation details]. Figure 2 The first amplifier circuit includes a first transistor M1, a second transistor M2, a third transistor M3, a fourth transistor M4, a sixth resistor R6, a fourth capacitor C4, a fifth capacitor C5, and an eleventh capacitor C6. 11 The twelfth capacitor C 12 Harmonic control circuit;

[0082] The source of the first transistor M1 is connected to the source of the second transistor M2 and grounded. The gate of the first transistor M1 is connected to the drain of the second transistor M2 through the fourth capacitor C4. The gate of the first transistor M1 is connected to the secondary coil of the first coupling inductor TF1. The gate of the second transistor M2 is connected to the drain of the first transistor M1 through the fifth capacitor C5. The gate of the second transistor M2 is connected to the other end of the secondary coil of the first coupling inductor TF1. One end of the sixth resistor R6 is connected to the bias voltage, and the other end is connected to the gates of the third transistor M3 and the fourth transistor M4 respectively. The source of the third transistor M3 is connected to the eleventh capacitor C5. 11 Connected to the source of the fourth transistor M4, the source of the fourth transistor M4 is connected to the twelfth capacitor C 12 The third transistor M3 is connected to the drain of the third transistor M3. The source of the third transistor M3 is connected to the drain of the first transistor M1, and the drain of the third transistor M3 is connected to one end of the primary coil of the second coupled inductor TF2. The source of the fourth transistor M4 is connected to the drain of the second transistor M2, and the drain of the fourth transistor M4 is connected to the other end of the primary coil of the second coupled inductor TF2.

[0083] The harmonic control circuit uses inductors and capacitors to create harmonic short circuits to improve the circuit's linearity. See details... Figure 3 The harmonic control circuit includes a second inductor L2, a third inductor L3, and an eighth capacitor C8;

[0084] One end of the second inductor L2 is connected to the source of the third transistor M3, and the other end is connected to the third inductor L3. One end of the third inductor L3 is connected to the source of the fourth transistor M4, and the other end is connected to the second inductor L2. One end of the eighth capacitor C8 is connected to the connection point of the second inductor L2 and the third inductor L3, and the other end is grounded.

[0085] As an optional implementation method, such as Figure 3 As shown, the second amplifier circuit includes a fifth transistor M5, a sixth transistor M6, a seventh transistor M7, an eighth transistor M8, a third resistor R3, a fourth resistor R4, an eighth resistor R8, a sixth capacitor C6, a seventh capacitor C7, and a thirteenth capacitor C10. 13 Fourteenth capacitor C 14 Harmonic control circuit;

[0086] The source of the fifth transistor M5 is connected to the source of the sixth transistor M6 and grounded. The gate of the fifth transistor M5 is connected to the drain of the sixth transistor M6 through the sixth capacitor C6. The gate of the fifth transistor M5 is connected to the secondary coil of the third coupling inductor TF3. The gate of the sixth transistor M6 is connected to the drain of the fifth transistor M5 through the seventh capacitor C7. The gate of the sixth transistor M6 is connected to the secondary coil of the third coupling inductor TF3. One end of the eighth resistor R8 is connected to the bias voltage, and the other end is connected to the gates of the seventh transistor M7 and the eighth transistor M8 respectively. The source of the seventh transistor M7 is connected to the thirteenth capacitor C... 13 Connected to the drain of the eighth transistor M8, the source of the eighth transistor M8 is connected to the fourteenth capacitor C. 14 The seventh transistor M7 is connected to its drain. The source of the seventh transistor M7 is connected to the drain of the fifth transistor M5. The source of the eighth transistor M8 is connected to the drain of the sixth transistor M6. The drain of the seventh transistor M7 is connected to one end of the primary winding of the fourth coupling inductor TF4, and the drain of the eighth transistor M8 is connected to the other end of the primary winding of the fourth coupling inductor TF4. One end of the third resistor R3 is connected to the gate of the fifth transistor M5, and the other end is connected to the fourth resistor R4. One end of the fourth resistor R4 is connected to the gate of the sixth transistor M6, and the other end is connected to the third resistor R3. The bias voltage is supplied by the third resistor R3 and the fourth resistor R4. , Supply is via R4 connector.

[0087] As an optional implementation method, such as Figure 3 As shown, the harmonic control circuit of the second amplifier circuit includes a fourth inductor L4, a fifth inductor L5, and a tenth capacitor C. 10 ;

[0088] The fourth inductor L4 is connected at one end to the source of the seventh transistor M7 and at the other end to the fifth inductor L5. One end of the fifth inductor L5 is connected to the source of the eighth transistor M8, and the other end is connected to the fourth inductor L4. The tenth capacitor C... 10 One end is connected to the connection point of the fourth inductor L4 and the fifth inductor L5, and the other end is grounded.

[0089] As an optional implementation method, such as Figure 4 As shown, one end of the primary coil of the first coupling inductor TF1 is connected to the radio frequency input RFin, and the other end is grounded. The secondary coil of the first coupling inductor TF1 is connected to the gates of the first transistor M1 and the second transistor M2, respectively.

[0090] The primary coil of the second coupling inductor TF2 is connected to the drains of the third transistor M3 and the fourth transistor M4, respectively. One end of the secondary coil of the second coupling inductor TF2 is connected to the RF output, and the other end is grounded.

[0091] One end of the primary coil of the third coupling inductor TF3 is connected to the radio frequency input RFin, and the other end is grounded. The secondary coil of the first coupling inductor TF3 is connected to the gates of the fifth transistor M5 and the sixth transistor M6, respectively.

[0092] The primary coil of the fourth coupling inductor TF4 is connected to the drains of the seventh transistor M7 and the eighth transistor M8, respectively. One end of the secondary coil of the fourth coupling inductor TF4 is connected to the radio frequency output, and the other end is grounded.

[0093] As an optional implementation method, such as Figure 4 As shown, the common-mode input matching circuit includes a first capacitor C1, a second capacitor C2, a first inductor L1, a first resistor R1, and a second resistor R2.

[0094] The radio frequency input RFin is connected to the first capacitor C1. One end of the second capacitor C2 is connected to the first capacitor C1, and the other end is grounded. One end of the first capacitor C1 and the second capacitor C2 are connected to one end of the first inductor L1. The other end of the first inductor L1 is connected to the center tap of the secondary coil of the first coupling inductor TF1 through the first resistor R1, transmitting the signal to the gates of the first transistor M1 and the second transistor M2. The other end of the first inductor L1 is connected to the center tap of the secondary coil of the third coupling inductor TF3 through the second resistor R2 and the third capacitor C3, transmitting the signal to the gates of the fifth transistor M5 and the sixth transistor M6. The other end of the first inductor L1 is connected to the feedback path. The bias voltage is connected to the other end of the first inductor L1 through the fifth resistor R5.

[0095] As an optional implementation method, such as Figure 4 As shown, the common-mode output matching circuit includes a sixth inductor L6, a seventh inductor L7, and a fifteenth capacitor C.15 The sixteenth capacitor C 16 The seventeenth capacitor C 17 ;

[0096] The amplified radio frequency signal is led out through the center tap of the primary coil of the second coupling inductor TF2 and the fourth coupling inductor TF4, and connected to the sixth inductor L6 and the fifteenth capacitor C. 15 The feedback path is connected, and the other end of the sixth inductor L6 is connected to the power supply. The fifteenth capacitor C 15 Connected to the sixteenth capacitor C via the seventh inductor L7 16 The seventeenth capacitor C 17 The sixteenth capacitor C 16 One end is grounded, the seventeenth capacitor C 17 One end is connected to the RF output.

[0097] As an optional implementation method, such as Figure 4 As shown, the feedback path includes a seventh resistor R7 and a ninth capacitor C9;

[0098] One end of the seventh resistor R7 is connected to the first inductor L1, the first resistor R1, the second resistor R2, and the fifth resistor R5, and the other end is connected to the ninth capacitor C9. The other end of the ninth capacitor C9 is connected to the center tap of the primary coil of the second coupling inductor TF2, the fourth coupling inductor TF4, the sixth inductor L6, and the fifteenth capacitor C. 15 Connected.

[0099] For example, such as Figure 5 a, Figure 5 b、 Figure 6 a, Figure 6 b、 Figure 7 a, Figure 7 As shown in Figure b, the tri-mode power amplifier designed in this example has a common-mode signal center frequency of 3.7 GHz and differential signal center frequencies of 28 GHz and 39 GHz. The 3dB bandwidth of the common-mode signal is 2-4.6 GHz, with an OP1dB of 17.1-17.8 dBm, corresponding to an efficiency of 34-36%. The output saturation power is 19.5-20.5 dBm, corresponding to an efficiency of 39-42%. At 28 GHz, the 3dB bandwidth is 24-30 GHz, with an OP1dB of 17.6-19 dBm, corresponding to an efficiency of 26.7-29%, and the output saturation power is 17.8-19.2 dBm, corresponding to an efficiency of 27-30%. At 39GHz, the 3dB bandwidth is 34-44GHz, the OP1dB is 18.9-19dBm, the corresponding efficiency is 24-26.7%, and the output saturation power is 18.3-19.1dBm, the corresponding efficiency is 25-28%.

[0100] In summary, the amplifier provided in this embodiment, compared with the prior art, has at least the following advantages and beneficial effects: It achieves the design of a three-mode power amplifier covering Sub6GHz, 28GHz, and 39GHz without introducing additional losses, and amplifies 28GHz and 39GHz differential-mode signals in differential mode. Power combining is used to amplify common-mode signals in Sub6GHz, and harmonic control circuitry is used to improve circuit linearity, covering the Sub6GHz band and the 28GHz and 39GHz millimeter-wave bands in the 5G frequency band.

[0101] Example 2

[0102] The amplifier circuit structure in this embodiment is largely the same as that in Embodiment 1 above, with the main difference being the first amplifier circuit and the second amplifier circuit: See Figure 8 In this embodiment, the first amplifier circuit and the second amplifier circuit are implemented using a common source structure, rather than a two-stage structure.

[0103] Example 3

[0104] The amplifier circuit structure in this embodiment is largely the same as that in Embodiment 1 above, with the main difference being the harmonic control circuit: see [link to embodiment]. Figure 9 In this embodiment, the harmonic control circuit includes an eighth inductor L8 and an eighteenth capacitor C. 18 and the nineteenth capacitor C 19 Specifically, the eighteenth capacitor C 18 and the nineteenth capacitor C 19 Connected in series between the gates of two transistors, one end of the eighth inductor L8 is connected to the eighteenth capacitor C. 18 and the nineteenth capacitor C 19 One end is connected to the ground, and the other end is grounded.

[0105] Example 4

[0106] The amplifier circuit structure in this embodiment is largely the same as that in Embodiment 1 above, with the main difference being the common-mode input matching circuit: see [link to embodiment]. Figure 10 In this embodiment, the common-mode input matching circuit includes a ninth inductor L9 and a tenth inductor L1. 10 Capacitor C of the 21st generation 21 Specifically, one end of the ninth inductor L9 serves as the input terminal of the common-mode input matching circuit, and the other end is connected to the twenty-first capacitor C. 21 One end; the twenty-first capacitor C 21 The other end serves as the output of the common-mode input matching circuit; the tenth inductor L 10 One end is connected to the other end of the ninth inductor L9, and the other end is grounded.

[0107] Example 5

[0108] The amplifier circuit structure in this embodiment is largely the same as that in Embodiment 1 above, with the main difference being the common-mode output matching circuit: see [link to embodiment]. Figure 11 In this embodiment, the common-mode output matching circuit includes an eleventh inductor L. 11 12th Inductor L 12 20th capacitor C 20 Specifically, the twentieth capacitor C 20 One end serves as the input of the common-mode output matching circuit, and the other end is connected to the twelfth inductor L. 12 One end; the twelfth inductor L 12 The other end serves as the output terminal of the common-mode output matching circuit; the eleventh inductor L 11 One end is connected to one end of the twelfth inductor, and the other end is grounded.

[0109] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0110] The above embodiments are merely illustrative of the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the content of the present invention and implement it accordingly. They should not be construed as limiting the scope of protection of the present invention. All equivalent changes or modifications made based on the essence of the content of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A power amplifier, characterized by, The application relates to a differential mode and common mode amplifier circuit. The first amplifier circuit and the second amplifier circuit are used for amplifying millimeter wave radio frequency signals of different frequency bands in a differential mode and are used for amplifying radio frequency signals of a lower frequency band in a common mode; wherein the lower frequency band is Sub6GHz; The millimeter wave radio frequency differential signals of different frequency bands pass through the first coupling inductor and the third coupling inductor and then are input into the first amplifier circuit and the second amplifier circuit for signal amplification; the amplified signals are output through the second coupling inductor and the fourth coupling inductor; The radio frequency common mode signals of the lower frequency band pass through the common mode input matching circuit, enter the secondary coil center tap of the first coupling inductor and the third coupling inductor, are input into the first amplifier circuit and the second amplifier circuit for signal amplification, and are output through the primary coil center tap of the second coupling inductor and the fourth coupling inductor before common mode output matching; the feedback path is used for stabilizing the common mode path; One end of the primary coil of the first coupling inductor is used as a first input end of the differential signal, and the other end is grounded; two ends of the secondary coil of the first coupling inductor are connected to two input ends of the first amplifier circuit respectively; Two output ends of the first amplifier circuit are connected to two ends of the primary coil of the second coupling inductor respectively; one end of the secondary coil of the second coupling inductor is used as a first output end of the differential signal, and the other end is grounded; One end of the primary coil of the third coupling inductor is used as a second input end of the differential signal, and the other end is grounded; two ends of the secondary coil of the third coupling inductor are connected to two input ends of the second amplifier circuit respectively; Two output ends of the second amplifier circuit are connected to two ends of the primary coil of the fourth coupling inductor respectively; one end of the secondary coil of the fourth coupling inductor is used as a first output end of the differential signal, and the other end is grounded; The input end of the common mode input matching circuit is used as an input end of the common mode signal; the first output end is connected to the secondary coil center tap of the first coupling inductor; the second output end is connected to the secondary coil center tap of the third coupling inductor; and the third output end is connected to one end of the feedback path; The input ends of the common mode output matching circuit are connected to the primary coil center tap of the third coupling inductor, the primary coil center tap of the fourth coupling inductor and the other end of the feedback path; and the output end of the common mode output matching circuit is used as an output end of the common mode signal. The first amplifier circuit comprises a first transistor, a second transistor, a third transistor, a fourth transistor, a sixth resistor, a fourth capacitor, a fifth capacitor, an eleventh capacitor and a twelfth capacitor; 2. A power amplifier according to claim 1, characterized in that The gate of the first transistor is used as a first input end of the first amplifier circuit; the source is grounded; and the drain is connected to the source of the third transistor; The gate of the second transistor is used as a second input end of the first amplifier circuit; the source is grounded; and the drain is connected to the source of the fourth transistor; ​ One end of the fourth capacitor is connected to the gate of the first transistor, and the other end is connected to the drain of the second transistor; one end of the fifth capacitor is connected to the gate of the second transistor, and the other end is connected to the drain of the first transistor; The gate of the third transistor is connected to one end of the sixth resistor, and the drain is used as the first output end of the first amplification circuit; the gate of the fourth transistor is connected to one end of the sixth resistor, and the drain is used as the second output end of the first amplification circuit; the other end of the sixth resistor is connected to the first bias voltage; One end of the eleventh capacitor is connected to the source of the third transistor, and the other end is connected to the drain of the fourth transistor; One end of the twelfth capacitor is connected to the source of the fourth transistor, and the other end is connected to the drain of the third transistor.

3. A power amplifier according to claim 2, characterised in that The first amplification circuit further comprises a harmonic control circuit, and the harmonic control circuit comprises a second inductor, a third inductor and an eighth capacitor; One end of the second inductor is connected to the source of the third transistor, and the other end is connected to one end of the third inductor; the other end of the third inductor is connected to the source of the fourth transistor; one end of the eighth capacitor is connected to the connection point of the second inductor and the third inductor, and the other end is grounded.

4. A power amplifier according to claim 1, characterized in that The second amplification circuit comprises a fifth transistor, a sixth transistor, a seventh transistor, an eighth transistor, a third resistor, a fourth resistor, an eighth resistor, a sixth capacitor, a seventh capacitor, a thirteenth capacitor and a fourteenth capacitor; The gate of the fifth transistor is used as the first input end of the second amplification circuit, the source is grounded, and the drain is connected to the source of the seventh transistor; The gate of the sixth transistor is used as the second input end of the second amplification circuit, the source is grounded, and the drain is connected to the source of the eighth transistor; The third resistor and the fourth resistor are connected in series between the gate of the fifth transistor and the gate of the sixth transistor, and the connection point of the third resistor and the fourth resistor is connected to the second bias voltage; One end of the sixth capacitor is connected to the gate of the fifth transistor, and the other end is connected to the drain of the seventh transistor; one end of the seventh capacitor is connected to the gate of the sixth transistor, and the other end is connected to the drain of the fifth transistor; The gate of the seventh transistor is connected to one end of the eighth resistor, and the drain is used as the first output end of the second amplification circuit; the gate of the eighth transistor is connected to one end of the eighth resistor, and the drain is used as the second output end of the second amplification circuit; the other end of the eighth resistor is connected to the third bias voltage; One end of the thirteenth capacitor is connected to the source of the seventh transistor, and the other end is connected to the drain of the eighth transistor; One end of the fourteenth capacitor is connected to the source of the eighth transistor, and the other end is connected to the drain of the seventh transistor.

5. A power amplifier according to claim 1, characterized in that The common mode input matching circuit comprises a first capacitor, a second capacitor, a first inductor, a first resistor and a second resistor; One end of the first capacitor is used as the input end of the common mode input matching circuit, and the other end is connected to one end of the first inductor; the other end of the first inductor is connected to one end of the feedback path; One end of the second capacitor is connected to the other end of the first capacitor, and the other end is grounded; One end of the first resistor is connected to the other end of the first inductor, and the other end is connected to the center tap of the secondary coil of the first coupling inductor; One end of the second resistor is connected to the other end of the first inductor, and the other end is connected to the center tap of the secondary coil of the third coupled inductor through a third capacitor.

6. A power amplifier according to claim 1, characterized in that The common mode output matching circuit comprises a sixth inductor, a seventh inductor, a fifteenth capacitor, a sixteenth capacitor and a seventeenth capacitor; One end of the fifteenth capacitor is an input end of the common mode output matching circuit, and the other end is connected to one end of the seventh inductor; the other end of the seventh inductor is connected to one end of the seventeenth capacitor; and the other end of the seventeenth capacitor is an output end of the common mode output matching circuit; One end of the sixth inductor is connected to one end of the fifteenth capacitor, and the other end is connected to a power supply; One end of the sixteenth capacitor is connected to the other end of the seventh inductor, and the other end is grounded.

7. A power amplifier according to claim 1, characterized in that The feedback path comprises a seventh resistor and a ninth capacitor; One end of the seventh resistor is one end of the feedback path, and the other end is connected to one end of the ninth capacitor; and the other end of the ninth capacitor is the other end of the feedback path.

8. A chip, characterized by A power amplifier comprising any one of the power amplifiers as claimed in claims 1-7.

9. An electronic device, comprising: A chip comprising the chip as claimed in claim 8.

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