Power amplifier and radio frequency front-end module

Abstract

The utility model discloses a power amplifier and a radio frequency front-end module. The power amplifier comprises a first amplifying circuit, a second amplifying circuit and a third amplifying circuit, a second amplification circuit; the first end of the first feed circuit is connected with the power supply end of the first amplification circuit; the first end of the second feed circuit is connected with the power supply end of the second amplification circuit; the first resonance circuit is connected between the second end of the first feed circuit and the power supply end, and the second end of the second feed circuit is connected with the power supply end; or, the first resonance circuit is connected between the second end of the second feed circuit and the power supply end, and the second end of the first feed circuit is connected with the power supply end. According to the power amplifier, the loop effect generated between the first amplification circuit and the second amplification circuit is cut off through the first resonance circuit, and the stability of the power amplifier can be improved.

Description

Technical Field

[0001] The present application relates to the field of radio frequency technology, and in particular to a power amplifier and a radio frequency front-end module. Background Art

[0002] In radio frequency technology, it is usually necessary to set a power amplifier in the radio frequency front-end module for power amplification. When multiple amplifier circuits are set in the power amplifier, in order to save layout space, multiple amplifier circuits are usually configured to share a power supply. In this way, a loop effect will be generated between the multiple amplifier circuits, and the loop effect will cause the stability of the power amplifier to deteriorate. Summary of the invention

[0003] The present application provides a power amplifier and a radio frequency front-end module, which solve the problem in the related art that when multiple amplifier circuits share a power supply, a loop effect is generated, resulting in poor stability of the power amplifier.

[0004] In a first aspect, the present application provides a power amplifier having a power supply terminal, the power amplifier comprising: a first amplifier circuit; a second amplifier circuit; a first feed circuit, the first end of the first feed circuit is connected to the power supply terminal of the first amplifier circuit; a second feed circuit, the first end of the second feed circuit is connected to the power supply terminal of the second amplifier circuit; a first resonant circuit, the first resonant circuit is connected between the second end of the first feed circuit and the power supply terminal, and the second end of the second feed circuit is connected to the power supply terminal; or, the first resonant circuit is connected between the second end of the second feed circuit and the power supply terminal, and the second end of the first feed circuit is connected to the power supply terminal.

[0005] The above-mentioned power amplifier can use the first resonant circuit to cut off the loop effect generated between the first amplifier circuit and the second amplifier circuit by connecting the first resonant circuit between the power supply terminal and the power supply terminal of the first amplifier circuit, or connecting the first resonant circuit between the power supply terminal and the power supply terminal of the second amplifier circuit, thereby improving the stability of the power amplifier.

[0006] In a second aspect, the present application also provides a power amplifier having a power supply terminal, the power amplifier comprising: a first amplifier circuit; a second amplifier circuit; a first feed circuit, the first end of the first feed circuit is connected to the power supply terminal of the first amplifier circuit; a second feed circuit, the first end of the second feed circuit is connected to the power supply terminal of the second amplifier circuit; a first resonant circuit, the first resonant circuit is connected between the second end of the first feed circuit and the power supply terminal; a second resonant circuit, the first resonant circuit is connected between the second end of the second feed circuit and the power supply terminal.

[0007] The above-mentioned power amplifier can use the first resonant circuit and the second resonant circuit to cut off the loop effect generated between the first amplifier circuit and the second amplifier circuit by connecting the first resonant circuit between the power supply terminal and the power supply terminal of the first amplifier circuit, thereby improving the stability of the power amplifier.

[0008] In the third aspect, the present application also provides a radio frequency front-end module, which includes a substrate, a first chip arranged on the substrate, a first resonant circuit and a power supply terminal; the first chip includes a first amplifier circuit, a second amplifier circuit, a first feeding circuit and a second feeding circuit; the first end of the first feeding circuit is connected to the power supply terminal of the first amplifier circuit, the second end of the first feeding circuit is connected to the first solder pad in the first chip, the first end of the second feeding circuit is connected to the power supply terminal of the second amplifier circuit, and the second end of the second feeding circuit is connected to the second solder pad in the first chip; the first resonant circuit is connected between the first solder pad and the power supply terminal, and the second end of the second feeding circuit is connected to the power supply terminal; or, the first resonant circuit is connected between the second solder pad and the power supply terminal, and the second end of the first feeding circuit is connected to the power supply terminal.

[0009] The above-mentioned RF front-end module can use the first resonant circuit to cut off the loop effect generated between the first amplifier circuit and the second amplifier circuit by connecting the first resonant circuit between the power supply end and the power supply end of the first amplifier circuit, or connecting the first resonant circuit between the power supply end and the power supply end of the second amplifier circuit, thereby improving the stability of the RF front-end module. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0011] Figure 1 It is a schematic diagram of the circuit structure of a radio frequency front-end module provided in an embodiment of the present application;

[0012] Figure 2 is a schematic diagram of a circuit structure of a power amplifier provided in an embodiment of the present application;

[0013] Figure 3 is a schematic diagram of the circuit structure of another power amplifier provided in an embodiment of the present application;

[0014] Figure 4is a schematic diagram of the circuit structure of another power amplifier provided in an embodiment of the present application;

[0015] Figure 5 is a schematic diagram of the circuit structure of another power amplifier provided in an embodiment of the present application;

[0016] Figure 6 is a schematic diagram of the circuit structure of another power amplifier provided in an embodiment of the present application;

[0017] Figure 7 is a schematic diagram of the circuit structure of another power amplifier provided in an embodiment of the present application;

[0018] Figure 8 is a schematic diagram of the circuit structure of another power amplifier provided in an embodiment of the present application;

[0019] Fig. 9 is a schematic diagram of the circuit structure of another power amplifier provided in an embodiment of the present application;

[0020] Fig.10 is a schematic diagram of the circuit structure of another power amplifier provided in an embodiment of the present application;

[0021] Fig.11 is a schematic diagram of the circuit structure of another power amplifier provided in an embodiment of the present application;

[0022] Fig.12 is a schematic diagram of the circuit structure of another power amplifier provided in an embodiment of the present application;

[0023] Fig.13 is a schematic diagram of the circuit structure of another power amplifier provided in an embodiment of the present application;

[0024] Fig.14 is a schematic diagram of the circuit structure of another power amplifier provided in an embodiment of the present application;

[0025] Fig.15 is a schematic diagram of the circuit structure of another power amplifier provided in an embodiment of the present application;

[0026] Fig.16 is a schematic diagram of the circuit structure of another power amplifier provided in an embodiment of the present application;

[0027] Fig.17 It is a schematic diagram of the circuit structure of a radio frequency front-end module provided in an embodiment of the present application;

[0028] Fig.18 It is a schematic diagram of the circuit structure of another RF front-end module provided in an embodiment of the present application. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0030] The flowcharts shown in the accompanying drawings are only examples and do not necessarily include all the contents and operations / steps, nor must they be executed in the order described. For example, some operations / steps may also be decomposed, combined or partially merged, so the actual execution order may change according to actual conditions.

[0031] It should be understood that the terms used in this application specification are only for the purpose of describing specific embodiments and are not intended to limit the application. As used in this application specification and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include plural forms.

[0032] It should also be understood that the term “and / or” used in the specification and appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0033] In conjunction with the accompanying drawings, some embodiments of the present application are described in detail below. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0034] In the related art, when multiple amplifying circuits are provided in a power amplifier, in order to save layout space, the multiple amplifying circuits are usually configured to share a power supply, which will generate a loop effect between the multiple amplifying circuits and cause the stability of the power amplifier to deteriorate.

[0035] To this end, the embodiment of the present application provides a power amplifier and a radio frequency front-end module, by connecting a first resonant circuit between the power supply end and the power supply end of the first amplifier circuit, or connecting a first resonant circuit between the power supply end and the power supply end of the second amplifier circuit, the first resonant circuit can be used to cut off the loop effect generated between the first amplifier circuit and the second amplifier circuit, thereby improving the stability of the power amplifier. The structure of the power amplifier will be described in detail below.

[0036] See also Figure 1 , Figure 1 is a schematic diagram of a circuit structure of a radio frequency front-end module 10 provided in an embodiment of the present application, such as Figure 1 As shown, the RF front-end module 10 may include a power amplifier 100 .

[0037] It should be noted that the RF front-end module 10 is a component that integrates two or more discrete devices such as RF switches, low-noise amplifiers, filters, duplexers, and power amplifiers into an independent module, thereby improving integration and hardware performance and miniaturizing the volume. The RF front-end module 10 in this embodiment can support carrier aggregation, dual connectivity, and multiple-input and multiple-output (MIMO).

[0038] Specifically, the RF front-end module 10 can be applied to communication devices such as smartphones, tablet computers, smart watches, and routers. Among them, the communication devices may include electronic devices such as smartphones, tablet computers, and smart watches, and may also include communication devices such as base stations and NFC (Near Field Communication) devices. The RF front-end module 10 can receive or transmit RF signals through an antenna in the communication device, and the power amplifier 100 is used to amplify the received or transmitted RF signals.

[0039] See also Figure 2 , Figure 2 is a schematic diagram of a circuit structure of a power amplifier 100 provided in an embodiment of the present application, such as Figure 2 As shown, the power amplifier 100 may include a power supply terminal 101, a first amplifying circuit 102, a second amplifying circuit 103, a first feeding circuit 104, a second feeding circuit 105 and a first resonant circuit 106. The first end of the first feeding circuit 104 is connected to the power supply terminal VCC1 of the first amplifying circuit 102, and the first end of the second feeding circuit 105 is connected to the power supply terminal VCC2 of the second amplifying circuit 103.

[0040] like Figure 2 As shown, the first resonant circuit 106 is connected between the second end of the first feeding circuit 104 and the power supply end 101 , and the second end of the second feeding circuit 105 is connected to the power supply end 101 .

[0041] See also Figure 3 , Figure 3 is a schematic diagram of the circuit structure of another power amplifier 100 provided in an embodiment of the present application, such as Figure 3 As shown, the first resonant circuit 106 may also be connected between the second end of the second feeding circuit 105 and the power supply terminal 101 , and the second end of the first feeding circuit 104 is connected to the power supply terminal 101 .

[0042] The first amplifier circuit 102 and the second amplifier circuit 103 are used to amplify the power of the input radio frequency signal. The first feed circuit 104 is used to filter out power supply noise and power supply ripple, so that the first amplifier circuit 102 works more stably. The second feed circuit 105 is used to filter out power supply noise and power supply ripple, so that the second amplifier circuit 102 works more stably.

[0043] In the above embodiment, by connecting the first resonant circuit 106 between the power supply terminal VCC1 of the first amplifier circuit 102 and the power supply terminal 101, or connecting the first resonant circuit 106 between the power supply terminal VCC2 of the second amplifier circuit 103 and the power supply terminal 101, the first resonant circuit 106 can be used to cut off the loop effect generated between the first amplifier circuit 102 and the second amplifier circuit 103, thereby improving the stability of the power amplifier 100.

[0044] In the embodiment of the present application, the first resonant circuit 106 may be a parallel LC circuit or a series LC circuit. These two situations will be described in detail below.

[0045] See also Figure 4 , Figure 4 is a schematic diagram of the circuit structure of another power amplifier 100 provided in an embodiment of the present application, such as Figure 4 As shown, the first resonant circuit 106 may include a first inductor L1 and a first capacitor C1, the first end of the first inductor L1 is connected to the second end of the first feeding circuit 104, the second end of the first inductor L1 is connected to the power supply terminal 101, the first end of the first capacitor C1 is connected to the first end of the first inductor L1, and the second end of the first capacitor C1 is connected to the second end of the first inductor L1.

[0046] It should be noted that when a loop effect is generated between the first amplifier circuit 102 and the second amplifier circuit 103, a radio frequency signal with a frequency band of f0 will be transmitted between the first amplifier circuit 102 and the second amplifier circuit 103. In the embodiment of the present application, the first inductor L1 and the first capacitor C1 are configured to be connected in parallel between the first feeding circuit 104 and the power supply terminal 101. The first inductor L1 and the first capacitor C1 can be resonated in the f0 frequency band, thereby blocking the passage of the radio frequency signal in the f0 frequency band, thereby cutting off the loop effect generated between the first amplifier circuit 102 and the second amplifier circuit 103. Among them, the f0 frequency band can be set according to actual conditions, and the specific value is not limited here. Exemplarily, when the power amplifier 100 does not oscillate, the f0 frequency band can be a fundamental frequency point; when the power amplifier 100 oscillates half-wave, the f0 frequency band can be a half-wave frequency point; when the power amplifier 100 oscillates harmonics, the f0 frequency band can be a harmonic frequency point.

[0047] In the above embodiment, by connecting the first inductor L1 and the first capacitor C1 in parallel between the first feeding circuit 104 and the power supply terminal 101, the first inductor L1 and the first capacitor C1 can be resonated in the f0 frequency band, thereby cutting off the loop effect generated between the first amplifier circuit 102 and the second amplifier circuit 103, thereby improving the stability of the power amplifier 100.

[0048] See also Figure 5 , Figure 5 is a schematic diagram of the circuit structure of another power amplifier 100 provided in an embodiment of the present application, such as Figure 5 As shown, the first end of the first inductor L1 is connected to the second end of the second feeding circuit 105, the second end of the first inductor L1 is connected to the power supply terminal 101, the first end of the first capacitor C1 is connected to the first end of the first inductor L1, and the second end of the first capacitor C1 is connected to the second end of the first inductor L1.

[0049] It should be noted that when a loop effect is generated between the first amplifier circuit 102 and the second amplifier circuit 103, a radio frequency signal with a frequency band of f0 will be transmitted between the first amplifier circuit 102 and the second amplifier circuit 103. In the embodiment of the present application, the first inductor L1 and the first capacitor C1 are configured to be connected in parallel between the second feeding circuit 105 and the power supply terminal 101, and the first inductor L1 and the first capacitor C1 can be resonated in the f0 frequency band, thereby blocking the passage of the radio frequency signal in the f0 frequency band, and thus the loop effect generated between the first amplifier circuit 102 and the second amplifier circuit 103 can be cut off.

[0050] In the above embodiment, by connecting the first inductor L1 and the first capacitor C1 in parallel between the second feeding circuit 105 and the power supply terminal 101, the first inductor L1 and the first capacitor C1 can be resonated in the f0 frequency band, thereby cutting off the loop effect generated between the first amplifier circuit 102 and the second amplifier circuit 103, thereby improving the stability of the power amplifier 100.

[0051] See also Figure 6 , Figure 6 is a schematic diagram of the circuit structure of another power amplifier 100 provided in an embodiment of the present application, such as Figure 6 As shown, the first end of the first capacitor C1 is connected to the common end between the power supply end 101 and the second end of the first feeding circuit 104, the second end of the first capacitor C1 is connected to the first end of the first inductor L1, and the second end of the first inductor L1 is grounded.

[0052] Please refer to Figure 6In addition to being connected to the common end between the power supply terminal 101 and the second end of the first feeding circuit 104, the first end of the first capacitor C1 can also be connected to the common end between the power supply terminal 101 and the second end of the second feeding circuit 105, the second end of the first capacitor C1 is connected to the first end of the first inductor L1, and the second end of the first inductor L1 is grounded.

[0053] It should be noted that when a loop effect is generated between the first amplifier circuit 102 and the second amplifier circuit 103, a radio frequency signal with a frequency band of f0 will be transmitted between the first amplifier circuit 102 and the second amplifier circuit 103. In the embodiment of the present application, the first inductor L1 and the first capacitor C1 are configured to be connected in series to the ground, and the first inductor L1 and the first capacitor C1 can be resonated at the frequency f0, so that the radio frequency signal with a frequency band of f0 can be released to the ground, and the loop effect generated between the first amplifier circuit 102 and the second amplifier circuit 103 can be cut off.

[0054] In the above embodiment, by connecting the first inductor L1 and the first capacitor C1 in series to the ground, the first inductor L1 and the first capacitor C1 can be resonated in the f0 frequency band, thereby cutting off the loop effect generated between the first amplifier circuit 102 and the second amplifier circuit 103, thereby improving the stability of the power amplifier 100.

[0055] In some embodiments, Figures 4 to 6 As shown, the first inductor L1 is disposed on a substrate (not shown in the figure) in a winding manner, and the first capacitor C1 is disposed on the substrate in a patch manner.

[0056] Exemplarily, the first inductor L1 may be a winding inductor, and the first capacitor C1 may be a chip capacitor.

[0057] It should be noted that, in the embodiment of the present application, when there is sufficient space on the substrate, the first inductor L1 and the first capacitor C1 can be directly disposed on the substrate to facilitate detection and replacement of components.

[0058] In other embodiments, Figures 4 to 6 As shown, the first inductor L1 is disposed on a substrate (not shown in the figure) in a patch manner, and the first capacitor C1 is disposed on the substrate in a patch manner.

[0059] In the embodiment of the present application, the first inductor L1 may be a chip inductor in addition to a winding inductor.

[0060] It should be noted that by setting the first inductor L1 on the substrate in a chip manner, since the chip inductor occupies a smaller area, the layout space occupied by the RF front-end module 10 can be reduced, making the overall structure of the RF front-end module 10 more compact and miniaturized.

[0061] In some other embodiments, the first inductor L1 is disposed on a first chip on a substrate in a stacked inductor manner, and the first capacitor is disposed on the first chip in a stacked capacitor manner.

[0062] It should be noted that when the first inductor L1 is arranged on the first chip, since the stacked inductor is small in size, has good magnetic shielding and high reliability, the first inductor L1 is arranged on the first chip in the form of a stacked inductor, which can not only reduce the layout space occupied by the first chip, but also improve the reliability of the first chip. By arranging the first capacitor C1 on the first chip in the form of a stacked capacitor, the layout space occupied by the first chip can be reduced, making the overall structure of the first chip more compact and miniaturized.

[0063] In some embodiments, in the first working mode, the first resonant circuit 106 is configured to resonate at the fundamental frequency point, and the first working mode is that the power amplifier 100 does not oscillate.

[0064] It should be noted that, in the embodiment of the present application, in order to ensure that the power amplifier 100 does not have excessive power feedback, the first resonant circuit 106 can be configured to resonate at the fundamental frequency when the power amplifier 100 does not oscillate.

[0065] In some other embodiments, in the second working mode, the first resonant circuit 106 is configured to resonate at a half-wave frequency point, and the second working mode is that the power amplifier 100 generates a half-wave oscillation.

[0066] It should be noted that, when the power amplifier 100 is found to have half-wave oscillation during circuit simulation or testing, the first resonant circuit 106 may be configured to resonate at the half-wave frequency point.

[0067] In the above embodiment, when the power amplifier 100 generates half-wave oscillation, the first resonant circuit 106 is configured to resonate at the half-wave frequency point, thereby offsetting the influence of the half-wave oscillation on the RF signal output by the power amplifier 100 .

[0068] In some other embodiments, in the third working mode, the first resonant circuit 106 is configured to resonate at a harmonic frequency point, and the third working mode is that the power amplifier 100 generates harmonic oscillation.

[0069] It should be noted that, when harmonic oscillation is found in the power amplifier 100 during circuit simulation or testing, the first resonant circuit 106 may be configured to resonate at the harmonic frequency point.

[0070] In the above embodiment, when harmonic oscillation occurs in the power amplifier 100 , the first resonant circuit 106 is configured to resonate at the harmonic frequency point, thereby offsetting the influence of the harmonic oscillation on the RF signal output by the power amplifier 100 .

[0071] See also Figure 7 , Figure 7 is a schematic diagram of the circuit structure of another power amplifier 100 provided in an embodiment of the present application, such as Figure 7 As shown, the power amplifier 100 also has a first signal input terminal 107 and a first signal output terminal 108, the first amplifier circuit 102 is a pre-stage amplifier circuit, the second amplifier circuit 103 is a post-stage amplifier circuit, the input terminal of the first amplifier circuit 102 is connected to the first signal input terminal 107, the output terminal of the first amplifier circuit 102 is connected to the input terminal of the second amplifier circuit 103, and the output terminal of the second amplifier circuit 103 is connected to the first signal output terminal 108.

[0072] Among them, the amplifying transistors included in the first amplifying circuit 102 and the second amplifying circuit 103 can be bipolar junction transistors (Bipolar Junction Transistor, BJT), Metal Oxide Semiconductor Field Effect Transistor (Metal Oxide Semiconductor Field Effect Transistor, MOSFET) or other types of transistors. The embodiment of the present application does not limit the types of transistors in the first amplifying circuit 102 and the second amplifying circuit 103.

[0073] It should be noted that in the embodiment of the present application, when the power amplifier 100 is required to have a larger power gain, a multi-stage amplifier circuit can be provided for power amplification, wherein the number of stages of the amplifier circuit can be set according to the power gain.

[0074] In the above embodiment, by configuring the first amplifier circuit 102 as a pre-amplifier circuit and the second amplifier circuit 103 as a post-amplifier circuit, multi-stage power amplification of the input RF signal can be achieved, ensuring that the power amplification factor of the power amplifier 100 meets the requirements.

[0075] See also Figure 8 , Figure 8 is a schematic diagram of the circuit structure of another power amplifier 100 provided in an embodiment of the present application, such as Figure 8 As shown, the second amplifier circuit 103 is a front-stage amplifier circuit, the first amplifier circuit 102 is a rear-stage amplifier circuit, the input end of the second amplifier circuit 103 is connected to the first signal input end 107, the output end of the second amplifier circuit 103 is connected to the input end of the first amplifier circuit 102, and the output end of the first amplifier circuit 102 is connected to the first signal output end 108.

[0076] By configuring the second amplifier circuit 103 as a pre-amplifier circuit and the first amplifier circuit 102 as a post-amplifier circuit, multi-stage power amplification of the input RF signal can be achieved, ensuring that the power amplification factor of the power amplifier 100 meets the requirements.

[0077] See also Fig. 9 , Fig. 9 is a schematic diagram of the circuit structure of another power amplifier 100 provided in an embodiment of the present application, such as Fig. 9 As shown, the power amplifier 100 also includes an inter-stage matching circuit 109, which includes a second capacitor C2, a third capacitor C3 and a second inductor L2. The first end of the second capacitor C2 is connected to the output end of the first amplifying circuit 102, the second end of the second capacitor C2 is connected to the first end of the third capacitor C3, the second end of the third capacitor C3 is connected to the input end of the second amplifying circuit 103, the first end of the second inductor L2 is connected to the second end of the second capacitor C2, and the second end of the second inductor L2 is grounded.

[0078] It should be noted that, since the first amplifier circuit 102 and the second amplifier circuit 103 are front and rear stage amplifier circuits, an inter-stage matching circuit 109 needs to be provided between the first amplifier circuit 102 and the second amplifier circuit 103 .

[0079] Combination Figure 8 and Fig. 9 When the second amplifier circuit 103 is a pre-stage amplifier circuit and the first amplifier circuit 102 is a post-stage amplifier circuit, the first end of the second capacitor C2 is connected to the input end of the first amplifier circuit 102, the second end of the second capacitor C2 is connected to the first end of the third capacitor C3, and the second end of the third capacitor C3 is connected to the output end of the second amplifier circuit 103.

[0080] In the above embodiment, by setting the inter-stage matching circuit 109 between the first amplifier circuit 102 and the second amplifier circuit 103, the inter-stage matching circuit 109 can be used to shape the inter-stage RF signal, making the inter-stage matching easier to achieve, while improving the reliability and linearity of the overall circuit.

[0081] In the embodiment of the present application, the first amplifier circuit 102 and the second amplifier circuit 103 may be not only pre- and post-amplifier circuits, but also differential amplifier circuits. The first amplifier circuit 102 and the second amplifier circuit 103 will be described in detail below.

[0082] See also Fig.10 , Fig.10 is a schematic diagram of the circuit structure of another power amplifier 100 provided in an embodiment of the present application, such as Fig.10As shown, the power amplifier 100 has a first signal input terminal 107 , a second signal input terminal 110 , a first signal output terminal 108 , and a second signal output terminal 111 .

[0083] The input end of the first amplifier circuit 102 is connected to the first signal input end 107, and the output end of the first amplifier circuit 102 is connected to the first signal output end 108. The input end of the second amplifier circuit 103 is connected to the second signal input end 110, and the output end of the second amplifier circuit 103 is connected to the second signal output end 111.

[0084] It should be noted that, in order to enable the power amplifier 100 to transmit multiple differential signals simultaneously, the power amplifier 100 can be configured as a differential power amplifier 100. Among them, the first amplifier circuit 102 is the first amplifier branch of the differential power amplifier 100, and the second amplifier circuit 103 is the second amplifier branch of the differential power amplifier 100. It can be understood that when the power amplifier 100 is configured as a differential power amplifier 100, the phase difference of the radio frequency signal transmitted by the first amplifier circuit 102 and the second amplifier circuit 103 is 180 degrees.

[0085] It should be noted that the power amplifier 100 may also be any type of power amplifier such as a Doherty power amplifier or a balanced power amplifier. The phase difference between the radio frequency signals transmitted by the first amplifier circuit 102 and the second amplifier circuit 103 may be 90 degrees. Alternatively, the phase difference between the radio frequency signals transmitted by the first amplifier circuit 102 and the second amplifier circuit 103 may be 270 degrees.

[0086] In the above embodiment, by configuring the power amplifier 100 as a differential power amplifier 100, the first amplifying circuit 102 as the first amplifying branch of the differential power amplifier 100, and the second amplifying circuit 103 as the second amplifying branch of the differential power amplifier 100, the power amplifier 100 can transmit RF signals with the same phase or different phases, thereby enriching the application scenarios of the power amplifier 100 and making the power amplifier 100 suitable for RF front-end modules 10 with different phase requirements.

[0087] See also Fig.11 , Fig.11 is a schematic diagram of the circuit structure of another power amplifier 100 provided in an embodiment of the present application, such as Fig.11 As shown, the first feeding circuit 104 may include a third inductor L3 and a fourth capacitor C4, and the second feeding circuit 105 may include a fourth inductor L4 and a fifth capacitor C5. A first end of the third inductor L3 is connected to the power supply terminal VCC1 of the first amplifying circuit 102, a second end of the third inductor L3 is connected to a first end of the first resonant circuit 106, a first end of the fourth capacitor C4 is connected to a second end of the third inductor L3, and a second end of the fourth capacitor C4 is grounded.

[0088] A first end of the fourth inductor L4 is connected to the power supply terminal VCC2 of the second amplifier circuit 103 , a second end of the fourth inductor L4 is connected to the power supply terminal 101 , a first end of the fifth capacitor C5 is connected to the second end of the fourth inductor L4 , and a second end of the fifth capacitor C5 is grounded.

[0089] It should be noted that, in the embodiment of the present application, the inductors and capacitors in the first feeding circuit 104 and the second feeding circuit 105 may be in a parallel structure in addition to a series structure.

[0090] See also Fig.12 , Fig.12 is a schematic diagram of the circuit structure of another power amplifier 100 provided in an embodiment of the present application, such as Fig.12 As shown, the first end of the third inductor L3 is connected to the power supply terminal VCC1 of the first amplifier circuit 102, the second end of the third inductor L3 is connected to the first end of the first resonant circuit 106, the first end of the fourth capacitor C4 is connected to the first end of the third inductor L3, and the second end of the fourth capacitor C4 is connected to the second end of the third inductor L3. The first end of the fourth inductor L4 is connected to the power supply terminal VCC2 of the second amplifier circuit 103, the second end of the fourth inductor L4 is connected to the power supply terminal 100, the first end of the fifth capacitor C5 is connected to the first end of the fourth inductor L4, and the second end of the fifth capacitor C5 is connected to the second end of the fourth inductor L4.

[0091] like Fig.11 and Fig.12 As shown, the third inductor L3 can be a feeding inductor, which is used to filter out power supply clutter and power supply ripple, reduce the influence of power supply noise on the first amplifier circuit 102, and make the first amplifier circuit 102 work more stably. The fourth capacitor C4 is a decoupling capacitor, which is used to filter out noise, provide a stable power supply for the first amplifier circuit 102 and reduce electromagnetic compatibility interference, thereby improving the stability, reliability and anti-interference ability of the circuit.

[0092] The fourth inductor L4 may be a feeding inductor, which is used to filter out power clutter and power ripple, reduce the influence of power noise on the second amplifier circuit 103, and make the second amplifier circuit 103 work more stably. The fifth capacitor C5 is a decoupling capacitor, which is used to filter out noise, provide a stable power supply for the second amplifier circuit 103 and reduce electromagnetic compatibility interference, thereby improving the stability, reliability and anti-interference ability of the circuit.

[0093] See also Fig.13 , Fig.13 is a schematic diagram of the circuit structure of another power amplifier 100 provided in an embodiment of the present application, such as Fig.13As shown, the first feeding circuit 104 may include a third inductor L3, and the second feeding circuit 105 may include a fourth inductor L4. A first end of the third inductor L3 is connected to the power supply terminal VCC1 of the first amplifying circuit 102, and a second end of the third inductor L3 is connected to a first end of the first resonant circuit 106. A first end of the fourth inductor L4 is connected to the power supply terminal VCC2 of the second amplifying circuit 103, and a second end of the fourth inductor L4 is connected to the power supply terminal 100.

[0094] In the above embodiment, by configuring the first feeding circuit 104 to include the third inductor L3 and omitting the fourth capacitor C4, not only can the influence of power supply noise on the first amplifier circuit 102 be reduced, but also the space occupied by the fourth capacitor C4 in the RF front-end module 10 and the hardware cost can be reduced. By configuring the second feeding circuit 105 to include the fourth inductor L4 and omitting the fifth capacitor C5, not only can the influence of power supply noise on the second amplifier circuit 103 be reduced, but also the space occupied by the fifth capacitor C5 in the RF front-end module 10 and the hardware cost can be reduced.

[0095] See also Fig.14 , Fig.14 is a schematic diagram of the circuit structure of another power amplifier 100 provided in an embodiment of the present application, such as Fig.14 As shown, the power amplifier 100 may include a power supply terminal 101, a first amplifying circuit 102, a second amplifying circuit 103, a first feeding circuit 104, a second feeding circuit 105, a first resonant circuit 106, and a second resonant circuit 112. The first end of the first feeding circuit 104 is connected to the power supply terminal VCC1 of the first amplifying circuit 102, and the first end of the second feeding circuit 105 is connected to the power supply terminal VCC2 of the second amplifying circuit 103. The first resonant circuit 106 is connected between the second end of the first feeding circuit 104 and the power supply terminal 100, and the second resonant circuit 110 is connected between the second end of the second feeding circuit 105 and the power supply terminal 100.

[0096] By connecting the first resonant circuit 106 between the power supply terminal of the first amplifier circuit 102 and the power supply terminal 101, and connecting the second resonant circuit 112 between the power supply terminal of the second amplifier circuit 103 and the power supply terminal 101, the first resonant circuit 106 and the second resonant circuit 112 can be used to cut off the loop effect generated between the first amplifier circuit 102 and the second amplifier circuit 103, thereby improving the stability of the power amplifier 100.

[0097] See also Fig.15 , Fig.15 is a schematic diagram of the circuit structure of another power amplifier 100 provided in an embodiment of the present application, such as Fig.15As shown, the first resonant circuit 106 may include a first inductor L1 and a first capacitor C1, the first end of the first inductor L1 is connected to the second end of the first feeding circuit 104, the second end of the first inductor L1 is connected to the power supply terminal 101, the first end of the first capacitor C1 is connected to the first end of the first inductor L1, and the second end of the first capacitor C1 is connected to the second end of the first inductor L1.

[0098] The second resonant circuit 112 may include a fifth inductor L5 and a sixth capacitor C6, wherein a first end of the fifth inductor L5 is connected to a second end of the second feeding circuit 105, a second end of the fifth inductor L5 is connected to a power supply terminal 101, a first end of the sixth capacitor C6 is connected to a first end of the fifth inductor L5, and a second end of the sixth capacitor C6 is connected to a second end of the fifth inductor L5.

[0099] It should be noted that when a loop effect is generated between the first amplifier circuit 102 and the second amplifier circuit 103, a radio frequency signal with a frequency band of f0 will be transmitted between the first amplifier circuit 102 and the second amplifier circuit 103. In the embodiment of the present application, the first inductor L1 and the first capacitor C1 are configured to be connected in parallel between the first feeding circuit 104 and the power supply terminal 101, and the first inductor L1 and the first capacitor C1 can be resonated in the f0 frequency band, thereby blocking the passage of the radio frequency signal in the f0 frequency band, and thus the loop effect generated between the first amplifier circuit 102 and the second amplifier circuit 103 can be cut off.

[0100] In the above embodiment, by setting the first inductor L1 and the first capacitor C1 in parallel between the first feeding circuit 104 and the power supply terminal 101, the first inductor L1 and the first capacitor C1 can be used to resonate in the f0 frequency band, thereby cutting off the loop effect generated between the first amplifier circuit 102 and the second amplifier circuit 103, thereby improving the stability of the power amplifier 100. By setting the fifth inductor L5 and the sixth capacitor C6 in parallel between the second feeding circuit 105 and the power supply terminal 101, the fifth inductor L5 and the sixth capacitor C6 can be used to resonate in the f0 frequency band, thereby cutting off the loop effect generated between the first amplifier circuit 102 and the second amplifier circuit 103, thereby improving the stability of the power amplifier 100.

[0101] See also Fig.16 , Fig.16 is a schematic diagram of the circuit structure of another power amplifier 100 provided in an embodiment of the present application, such as Fig.16 As shown, the first end of the first capacitor C1 is connected to the common end between the power supply end 101 and the second end of the first feeding circuit 104, the second end of the first capacitor C1 is connected to the first end of the first inductor L1, and the second end of the first inductor L1 is grounded.

[0102] A first end of the sixth capacitor C6 is connected to a common end between the power supply end 101 and the second end of the second feeding circuit 105 , a second end of the sixth capacitor C6 is connected to a first end of the fifth inductor L5 , and a second end of the fifth inductor L5 is grounded.

[0103] It should be noted that when a loop effect is generated between the first amplifier circuit 102 and the second amplifier circuit 103, a radio frequency signal with a frequency band of f0 will be transmitted between the first amplifier circuit 102 and the second amplifier circuit 103. In the embodiment of the present application, the first inductor L1 and the first capacitor C1 are configured to be connected in series to the ground, and the first inductor L1 and the first capacitor C1 can be resonated at the frequency f0, so that the radio frequency signal in the f0 frequency band can be released to the ground, and then the loop effect generated between the first amplifier circuit 102 and the second amplifier circuit 103 can be cut off. The fifth inductor L5 and the sixth capacitor C6 are configured to be connected in series to the ground, and the fifth inductor L5 and the sixth capacitor C6 can be resonated at the frequency f0, so that the radio frequency signal in the f0 frequency band can be released to the ground, and then the loop effect generated between the first amplifier circuit 102 and the second amplifier circuit 103 can be cut off.

[0104] In the above embodiment, by connecting the first inductor L1 and the first capacitor C1 in series to the ground, the first inductor L1 and the first capacitor C1 can be resonated in the f0 frequency band, thereby cutting off the loop effect generated between the first amplifier circuit 102 and the second amplifier circuit 103, thereby improving the stability of the power amplifier 100. By connecting the fifth inductor L5 and the sixth capacitor C6 in series to the ground, the fifth inductor L5 and the sixth capacitor C6 can be resonated in the f0 frequency band, thereby cutting off the loop effect generated between the first amplifier circuit 102 and the second amplifier circuit 103, thereby improving the stability of the power amplifier 100.

[0105] See also Fig.17 , Fig.17 is a schematic diagram of a circuit structure of a radio frequency front-end module 10 provided in an embodiment of the present application, such as Fig.17 As shown, the RF front-end module 10 may include a substrate 20, a first chip 30 arranged on the substrate 20, a first resonant circuit 106 and a power supply terminal 101; the first chip 30 includes a first amplifier circuit 102, a second amplifier circuit 103, a first feed circuit 104 and a second feed circuit 105.

[0106] like Fig.17As shown, a first end of the first feed circuit 104 is connected to the power supply terminal VCC1 of the first amplifier circuit 102, a second end of the first feed circuit 104 is connected to the first pad 301 in the first chip 30, a first end of the second feed circuit 105 is connected to the power supply terminal VCC2 of the second amplifier circuit 103, and a second end of the second feed circuit 105 is connected to the second pad 302 in the first chip 30. The first resonant circuit 106 is connected between the first pad 301 and the power supply terminal 101, and the second pad 302 is connected to the power supply terminal 101.

[0107] The specific structures of the first feeding circuit 104 , the second feeding circuit 105 and the first resonant circuit 106 may refer to the detailed description of the above embodiments and are not limited here.

[0108] See also Fig.18 , Fig.18 is a circuit structure diagram of another RF front-end module 10 provided in an embodiment of the present application, such as Fig.18 As shown, a first end of the first feed circuit 104 is connected to the power supply terminal VCC1 of the first amplifier circuit 102, a second end of the first feed circuit 104 is connected to the first pad 301 in the first chip 30, a first end of the second feed circuit 105 is connected to the power supply terminal VCC2 of the second amplifier circuit 103, and a second end of the second feed circuit 105 is connected to the second pad 302 in the first chip 30. The first resonant circuit 106 is connected between the second pad 302 and the power supply terminal 101, and the first pad 301 is connected to the power supply terminal 101.

[0109] In the above-mentioned embodiments, by connecting the first resonant circuit 106 between the power supply end of the first amplifier circuit 102 and the power supply end 101, or connecting the first resonant circuit 106 between the power supply end of the second amplifier circuit 103 and the power supply end 101, the first resonant circuit 106 can be used to cut off the loop effect generated between the first amplifier circuit 102 and the second amplifier circuit 103, thereby improving the stability of the RF front-end module 10.

[0110] The above are only specific implementations of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed in the present application, and these modifications or replacements should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A power amplifier, characterized in that: The power amplifier has a power supply terminal, and the power amplifier includes: A first amplifier circuit; A second amplifier circuit; a first feeding circuit, wherein a first end of the first feeding circuit is connected to a power supply end of the first amplifying circuit; a second feeding circuit, wherein a first end of the second feeding circuit is connected to a power supply end of the second amplifying circuit; a first resonant circuit, wherein the first resonant circuit is connected between the second end of the first feeding circuit and the power supply end, and the second end of the second feeding circuit is connected to the power supply end; or, the first resonant circuit is connected between the second end of the second feeding circuit and the power supply end, and the second end of the first feeding circuit is connected to the power supply end.

2. The power amplifier according to claim 1, characterized in that: The first resonant circuit comprises a first inductor and a first capacitor, wherein a first end of the first inductor is connected to a second end of the first feeding circuit, a second end of the first inductor is connected to a power supply terminal, a first end of the first capacitor is connected to a first end of the first inductor, and a second end of the first capacitor is connected to a second end of the first inductor; Alternatively, the first end of the first inductor is connected to the second end of the second feeding circuit, the second end of the first inductor is connected to the power supply terminal, the first end of the first capacitor is connected to the first end of the first inductor, and the second end of the first capacitor is connected to the second end of the first inductor.

3. The power amplifier according to claim 1, characterized in that: The first resonant circuit comprises a first inductor and a first capacitor, wherein a first end of the first capacitor is connected to a common end between the power supply end and the second end of the first feeding circuit, a second end of the first capacitor is connected to a first end of the first inductor, and a second end of the first inductor is grounded; Alternatively, the first end of the first capacitor is connected to a common end between the power supply end and the second end of the second feeding circuit, the second end of the first capacitor is connected to the first end of the first inductor, and the second end of the first inductor is grounded.

4. The power amplifier according to claim 2 or 3, characterized in that: The first inductor is arranged on the substrate in a winding manner or a patch manner, and the first capacitor is arranged on the substrate in a patch manner; Alternatively, the first inductor is arranged on a first chip on the substrate in a stacked inductor manner, and the first capacitor is arranged on the first chip in a stacked capacitor manner.

5. The power amplifier according to claim 1, characterized in that: In the first working mode, the first resonant circuit is configured to resonate at a fundamental frequency point; In the second working mode, the first resonant circuit is configured to resonate at a half-wave frequency point; In the third operating mode, the first resonant circuit is configured to resonate at a harmonic frequency point.

6. The power amplifier according to claim 5, characterized in that: The first working mode is that the power amplifier does not oscillate, the second working mode is that the power amplifier generates half-wave oscillation, and the third working mode is that the power amplifier generates harmonic oscillation.

7. The power amplifier according to claim 1, characterized in that: The power amplifier has a first signal input terminal and a first signal output terminal; The first amplifier circuit is a front-stage amplifier circuit, the second amplifier circuit is a rear-stage amplifier circuit, the input end of the first amplifier circuit is connected to the first signal input end, the output end of the first amplifier circuit is connected to the input end of the second amplifier circuit, and the output end of the second amplifier circuit is connected to the first signal output end; Alternatively, the second amplifier circuit is a pre-stage amplifier circuit, the first amplifier circuit is a post-stage amplifier circuit, the input end of the second amplifier circuit is connected to the first signal input end, the output end of the second amplifier circuit is connected to the input end of the first amplifier circuit, and the output end of the first amplifier circuit is connected to the first signal output end.

8. The power amplifier according to claim 7, characterized in that: The power amplifier also includes an inter-stage matching circuit, which includes a second capacitor, a third capacitor and a second inductor, wherein the first end of the second capacitor is connected to the output end of the first amplifier circuit, the second end of the second capacitor is connected to the first end of the third capacitor, the second end of the third capacitor is connected to the input end of the second amplifier circuit, the first end of the second inductor is connected to the second end of the second capacitor, and the second end of the second inductor is grounded.

9. The power amplifier according to claim 1, characterized in that: The power amplifier has a first signal input terminal, a second signal input terminal, a first signal output terminal, and a second signal output terminal; The input end of the first amplifier circuit is connected to the first signal input end, and the output end of the first amplifier circuit is connected to the first signal output end; The input end of the second amplifier circuit is connected to the second signal input end, and the output end of the second amplifier circuit is connected to the second signal output end.

10. The power amplifier according to claim 1, characterized in that: The first feeding circuit includes a third inductor and a fourth capacitor, and the second feeding circuit includes a fourth inductor and a fifth capacitor; The first end of the third inductor is connected to the power supply terminal of the first amplifier circuit, the second end of the third inductor is connected to the first end of the first resonant circuit, the first end of the fourth capacitor is connected to the second end of the third inductor, and the second end of the fourth capacitor is grounded; the first end of the fourth inductor is connected to the power supply terminal of the second amplifier circuit, the second end of the fourth inductor is connected to the power supply terminal, the first end of the fifth capacitor is connected to the second end of the fourth inductor, and the second end of the fifth capacitor is grounded; or, the first end of the third inductor is connected to the power supply terminal of the first amplifier circuit, the second end of the third inductor is connected to the first end of the first resonant circuit, the first end of the fourth capacitor is connected to the first end of the third inductor, and the second end of the fourth capacitor is connected to the second end of the third inductor; the first end of the fourth inductor is connected to the power supply terminal of the second amplifier circuit, the second end of the fourth inductor is connected to the power supply terminal, the first end of the fifth capacitor is connected to the first end of the fourth inductor, and the second end of the fifth capacitor is connected to the second end of the fourth inductor.

11. The power amplifier according to claim 1, characterized in that: The first feeding circuit includes a third inductor, and the second feeding circuit includes a fourth inductor; a first end of the third inductor is connected to the power supply terminal of the first amplifier circuit, and a second end of the third inductor is connected to the first end of the first resonant circuit; a first end of the fourth inductor is connected to the power supply terminal of the second amplifier circuit, and a second end of the fourth inductor is connected to the power supply terminal.

12. A power amplifier, characterized in that: The power amplifier has a power supply terminal, and the power amplifier includes: A first amplifier circuit; A second amplifier circuit; a first feeding circuit, wherein a first end of the first feeding circuit is connected to a power supply end of the first amplifying circuit; a second feeding circuit, wherein a first end of the second feeding circuit is connected to a power supply end of the second amplifying circuit; A first resonant circuit, wherein the first resonant circuit is connected between the second end of the first feeding circuit and the power supply end; A second resonant circuit is connected between the second end of the second feeding circuit and the power supply end.

13. The power amplifier according to claim 12, characterized in that: The first resonant circuit comprises a first inductor and a first capacitor, wherein a first end of the first inductor is connected to a second end of the first feeding circuit, a second end of the first inductor is connected to a power supply terminal, a first end of the first capacitor is connected to a first end of the first inductor, and a second end of the first capacitor is connected to a second end of the first inductor; The second resonant circuit comprises a fifth inductor and a sixth capacitor, wherein a first end of the fifth inductor is connected to a second end of the second feeding circuit, a second end of the fifth inductor is connected to the power supply terminal, a first end of the sixth capacitor is connected to a first end of the fifth inductor, and a second end of the sixth capacitor is connected to a second end of the fifth inductor; Alternatively, the first end of the first capacitor is connected to a common end between the power supply end and the second end of the first feeding circuit, the second end of the first capacitor is connected to the first end of the first inductor, and the second end of the first inductor is grounded; the first end of the sixth capacitor is connected to a common end between the power supply end and the second end of the second feeding circuit, the second end of the sixth capacitor is connected to the first end of the fifth inductor, and the second end of the fifth inductor is grounded.

14. A radio frequency front-end module, characterized in that: It includes a substrate, a first chip arranged on the substrate, a first resonant circuit and a power supply terminal; the first chip includes a first amplifying circuit, a second amplifying circuit, a first feeding circuit and a second feeding circuit; A first end of the first feed circuit is connected to a power supply end of the first amplifier circuit, a second end of the first feed circuit is connected to a first pad in the first chip, a first end of the second feed circuit is connected to a power supply end of the second amplifier circuit, and a second end of the second feed circuit is connected to a second pad in the first chip; The first resonant circuit is connected between the first pad and the power supply end, and the second pad is connected to the power supply end; or, the first resonant circuit is connected between the second pad and the power supply end, and the first pad is connected to the power supply end.

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