Power amplifier, signal transmitting device and electronic equipment

Abstract

Some embodiments of the present application provide a power amplifier, a signal transmitting device and an electronic device using the power amplifier. The power amplifier comprises an input unit, a differential amplification unit and an output unit. The input unit comprises at least one output port having a positive terminal and a negative terminal, and is configured to output a differential signal to be amplified. The differential amplification unit is coupled to the input unit and configured to amplify the differential signal to be amplified to obtain an initial amplified signal. The output unit is coupled to the differential amplification unit and configured to generate a target amplified signal according to the initial amplified signal. A phase adjustment network is connected in series between at least one output port of the input unit and the differential amplification unit. The phase adjustment network is configured to adjust the phase of the positive terminal and the negative terminal of the corresponding output port to achieve phase balance. The common mode stability of the power amplifier is improved without changing the structure of the input unit, and the optimization cost is reduced.

Description

Technical Field

[0001] This application relates to the field of power amplifier technology, and more particularly to a power amplifier, a signal transmitting device, and an electronic device. Background Technology

[0002] For differential power amplifiers, common-mode stability is an important design parameter. Insufficient common-mode stability will cause common-mode oscillation, which will lead to output signal distortion and damage the stability of the corresponding system.

[0003] In differential balanced power amplifiers, differential and balanced architectures are combined. The input unit typically uses a 90-degree coupler. One input signal is split into two differential signals by this coupler, which are then output to the differential amplifier unit for amplification via the through port and coupled port of the coupler, respectively. In practical applications, due to the non-ideal nature of the 90-degree coupler, phase imbalance may exist between the positive and negative terminals of both the through port and the coupled port, affecting the common-mode stability of the entire power amplifier.

[0004] In related technologies, the phase balance of the 90-degree coupler is improved by optimizing its structure, thereby improving the common-mode stability of the power amplifier. However, this optimization method is not only time-consuming, but also the actual optimization effect is not ideal. Summary of the Invention

[0005] Some embodiments of this application provide a power amplifier, a signal transmitting device, and an electronic device to solve the problem of phase imbalance between the positive and negative terminals of the output port providing differential signals in a power amplifier, improve the common-mode stability of the power amplifier, and reduce the time cost of power amplifier optimization.

[0006] In a first aspect, some embodiments of this application provide a power amplifier, including: an input unit including at least one output port, each of the output ports including a positive terminal and a negative terminal, the input unit being configured to generate at least one differential signal to be amplified based on an input signal, the differential signal to be amplified including a positive-phase signal output through the positive terminal and an inverted signal output through the negative terminal; A differential amplifier unit, coupled to the output port of the input unit, is used to amplify the differential signal to be amplified to obtain a corresponding initial amplified signal; An output unit, coupled to the differential amplifier unit, is used to generate a target amplified signal based on the initial amplified signal; A phase adjustment network is connected in series between at least one output port of the input unit and the differential amplifier unit. The phase adjustment network is used to adjust the phase of the positive and negative terminals of the corresponding output ports to achieve phase balance.

[0007] In this embodiment, to address the phase imbalance between the positive and negative terminals of the output port in the input unit of a differential power amplifier, a phase adjustment network is connected in series between the output port of the input unit and the differential amplifier unit. This network adjusts the phase of the input unit's output port, compensating for the phase deviation of its output signal and achieving phase balance. This ensures that the input signal to the subsequent differential amplifier unit is a differential signal with a 180-degree phase difference, preventing the introduction of common-mode components into the differential amplifier unit due to phase imbalance at the input unit's output port, thus improving the common-mode stability of the power amplifier. Furthermore, this embodiment does not require changes to the structural design of the input unit itself; only the appropriate phase adjustment network needs to be configured according to the degree of phase deviation between the positive and negative terminals of the input unit. It is simple to implement, improves the optimization efficiency of the power amplifier, and reduces optimization costs.

[0008] In an optional embodiment, the phase adjustment network includes at least one phase adjustment sub-network, and at least one of the positive terminal and the negative terminal is coupled to the differential amplifier unit through the phase adjustment sub-network; The phase adjustment subnetwork is used to perform phase adjustment on at least one of the positive and negative terminals to achieve phase balance between the positive and negative terminals.

[0009] In this embodiment, to achieve phase balance between the positive and negative terminals of the input unit's output port, a phase adjustment sub-network can be connected in series only after the positive or negative terminal. This means that one phase adjustment sub-network is used to adjust the phase of either the positive or negative terminal, reducing the number of phase adjustment sub-networks, saving space occupied by the phase adjustment networks in the power amplifier, and facilitating the miniaturization of the power amplifier and related application equipment, thus saving hardware costs. Alternatively, a corresponding phase adjustment sub-network can be connected in series after both the positive and negative terminals of the input unit. This means that two phase adjustment sub-networks are used to adjust the phase of the positive and negative terminals respectively, improving the flexibility of phase adjustment.

[0010] In one alternative embodiment, the phase adjustment network includes a phase adjustment device; the phase adjustment device includes at least one of an inductor, a transmission line, and a capacitor.

[0011] In this embodiment, different phase adjustment devices can cause different phase changes, and can be configured according to application requirements to adapt to different power amplifiers.

[0012] In an alternative embodiment, when the phase adjustment network includes a plurality of phase adjustment devices, the plurality of phase adjustment devices are connected in series or in parallel with each other.

[0013] In this embodiment, the phase changes caused by multiple phase adjustment devices can be vector-superimposed. By configuring the number, type, and connection method of the phase adjustment devices in the phase adjustment network, the superimposed phase adjustment amount can be controlled to meet the phase adjustment requirements of the corresponding port.

[0014] In an alternative embodiment, when the phase adjustment device includes a capacitor, a first terminal of the capacitor is grounded, and a second terminal of the capacitor is coupled to the inductor or the transmission line via a controllable switch.

[0015] In this embodiment, by controlling the closing / opening of the controllable switch, the corresponding capacitor can be selectively connected to the phase adjustment sub-network, thereby realizing on-demand control of the phase adjustment amount of the phase adjustment sub-network and matching different input units.

[0016] In an optional embodiment, the input unit includes an input coupler, the input coupler including a first output port and a second output port; The input coupler is used to perform power distribution on the input signal to obtain a first differential signal to be amplified and a second differential signal to be amplified, and outputs the first differential signal to be amplified through the first output port and the second differential signal to be amplified through the second output port.

[0017] In this embodiment, the input signal is distributed into two differential signals to be amplified by an input coupler. The two differential signals can be amplified by differential amplification units respectively, realizing a power amplifier that combines differential and balanced architectures. This not only retains the excellent VSWR performance of the balanced architecture, but also utilizes the differential structure's ability to suppress harmonics and common-mode noise, greatly improving the purity of the signal.

[0018] In an optional embodiment, the output unit includes an output coupler for combining a first initial amplified signal and a second initial amplified signal output by the differential amplification unit to obtain the target amplified signal. The first initial amplified signal is obtained by amplifying the first signal to be amplified through the differential amplification unit, and the second initial amplified signal is obtained by amplifying the second signal to be amplified through the differential amplification unit. The power amplifier further includes an impedance adjustment network; the impedance adjustment network is coupled to the isolation port of the output coupler and is used to adjust the load impedance of the isolation port.

[0019] In this embodiment, by setting up an impedance adjustment network, the load impedance of the isolation port of the output coupler is no longer a fixed 50Ω, but can be adjusted as needed, and even complex impedances can be achieved. This allows the load impedance of the isolation port to match the requirements of different application scenarios, ensuring its isolation performance, optimizing the output return performance of the power amplifier, and improving the power transmission efficiency of the power amplifier.

[0020] In an optional embodiment, the impedance adjustment network includes at least one resistor, and the impedance adjustment network further includes at least one of an inductor and a capacitor; the resistor, inductor and capacitor are connected in series or in parallel with each other.

[0021] In this embodiment, by setting capacitors and / or inductors in the impedance adjustment network, the reactive part of the load impedance, i.e. the imaginary part of the complex impedance, can be realized. This, together with the real part of the complex impedance corresponding to the resistor, can form a complex impedance of any value. Using this complex impedance as the load impedance of the isolation port of the output coupler can adapt to different application scenarios, achieve better isolation effect, and optimize the output return performance of the power amplifier.

[0022] Secondly, some embodiments of this application provide a signal transmitting device, which includes the power amplifier provided in the first aspect.

[0023] Thirdly, some embodiments of this application provide an electronic device that may include the signal transmitting device provided in the second aspect above, or the power amplifier provided in the first aspect above.

[0024] Based on the implementation methods provided above, the embodiments of this application can be further combined to provide more implementation methods.

[0025] It is understood that the solutions provided in the second and third aspects correspond to the solutions provided in the first aspect. Therefore, the beneficial effects of the second and third aspects can be referred to the beneficial effects of the first aspect, and repeated details will not be repeated. Attached Figure Description

[0026] To more clearly illustrate the implementation methods in some embodiments or related technologies of this application, the accompanying drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings.

[0027] Figure 1 This application provides a schematic diagram of the structure of a 90-degree coupler according to some embodiments; Figure 2The present application provides a schematic diagram of the structure of a power amplifier according to some embodiments; Figure 3 The present application provides a schematic diagram of the structure of a power amplifier according to some embodiments; Figure 4 The present application provides a schematic diagram of the structure of a power amplifier according to some embodiments; Figure 5 This application provides a schematic diagram of the structure of a phase adjustment network in a power amplifier according to some embodiments; Figure 6 This application provides a schematic diagram of the structure of a phase adjustment network in a power amplifier according to some embodiments; Figure 7 This application provides a schematic diagram of the structure of a neutron amplification unit in a power amplifier according to some embodiments; Figure 8 The present application provides a schematic diagram of the structure of a power amplifier according to some embodiments; Figure 9 This application provides a schematic diagram of the impedance adjustment network in a power amplifier according to some embodiments; Figure 10 The present application provides a schematic diagram of the structure of a signal transmitting device according to some embodiments; Figure 11 The diagram shows a structural schematic of an electronic device provided in some embodiments of this application. Detailed Implementation

[0028] To make the objectives and implementation methods of this application clearer, the exemplary implementation methods of this application will be clearly and completely described below with reference to the accompanying drawings of the exemplary embodiments of this application. Obviously, the exemplary embodiments described are only some embodiments of this application, and not all embodiments.

[0029] It should be noted that the brief descriptions of terms in this application are only for the convenience of understanding the embodiments described below, and are not intended to limit the embodiments of this application. Unless otherwise stated, these terms should be understood in their ordinary and common meaning.

[0030] The terms "first," "second," "third," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar or related objects or entities, and do not necessarily imply a specific order or sequence, unless otherwise specified. It should be understood that such terms are interchangeable where appropriate.

[0031] The terms “comprising” and “having”, and any variations thereof, are intended to cover but not exclude inclusion, for example, a product or device that includes a range of components is not necessarily limited to all of the components that are clearly listed, but may include other components that are not clearly listed or that are inherent to such product or device.

[0032] The application scenarios and existing problems of this application will be explained below with reference to the accompanying drawings.

[0033] A power amplifier (PA) is used to amplify a weak electrical signal from a signal source to a sufficiently high power to drive the relevant load (such as an antenna, speaker, motor, etc.) to work normally. It is widely used in wireless communication, audio, industrial control and other fields.

[0034] A balanced power amplifier uses a 90-degree coupler or input balun to split the input signal into two signals with equal power and a preset phase difference. These signals are then amplified by two separate amplification units. The two amplified signals are then phase-adjusted and superimposed to obtain the output signal. Compared to unbalanced amplifiers, balanced power amplifiers have a better VSWR, are less sensitive to load changes, and offer high stability and strong distortion resistance.

[0035] A differential power amplifier decomposes the input signal into two signals with a 180-degree phase difference: a positive (+) signal and an anti- (-) signal. These signals are then amplified by two completely symmetrical amplification branches, and the final output signal is the difference between the two amplified signals. Differential power amplifiers can suppress harmonics and common-mode noise, and offer high linearity and strong anti-interference capabilities.

[0036] The differential balanced power amplifier combines the aforementioned differential power amplifier and balanced power amplifier. Based on the balanced power amplifier, both of its amplification units adopt a differential structure. This not only retains the excellent VSWR performance of the balanced architecture, but also utilizes the differential structure's ability to suppress harmonics and common-mode noise, thus significantly improving the purity of the signal.

[0037] Figure 1 This is a schematic diagram of a 90-degree coupler provided for some embodiments of this application.

[0038] A 90-degree coupler, also known as a quadrature hybrid coupler or a 3dB bridge, is a four-port passive device, such as... Figure 1The four ports a~d shown can be used as power dividers to split one input signal into two output signals with equal power and a 90-degree phase difference. They can also be used as synthesizers to combine two input signals with a 90-degree phase difference into one output signal.

[0039] Reference Figure 1 The solid line with an arrow indicates the signal flow direction. When a 90-degree coupler is used as a power divider, either port can be used as the power divider input port. Figure 1 Taking port a as the power divider input port as an example, it receives one signal S1 to be distributed; one port adjacent to the input port, such as port d, serves as the isolated port; the other two ports, namely ports b and c, serve as the through port (Thr) and the coupled port (Coupled Port) respectively, outputting two signals S1 with a 90-degree phase difference. 11 and S 12 .

[0040] Reference Figure 1 The signal flow indicated by the dashed arrow in the diagram shows that, when the 90-degree coupler is used as a synthesizer, ports b and c still function as the through port Thr and the coupling port Cou, respectively, while port d remains the isolation port. In this case, port a can be used as the output port of the synthesized signal. Based on this, the two signals S to be synthesized, which are 90 degrees out of phase... 21 and S 22 The signal S2 can be input through port b (thr, the direct port) and port c (cou, the coupling port), and the combined signal S2 can be output through port a.

[0041] For example, since the standard impedance of the relevant application system is typically 50Ω, the isolation port of the 90-degree coupler is typically connected to a 50Ω load to match the system impedance, reduce reflected waves, and improve signal transmission efficiency.

[0042] In some embodiments, the 90-degree coupler described above can serve as the input and / or output unit of a differential balanced amplifier.

[0043] Reference Figure 2 The differential balanced power amplifier 100 provided in some embodiments of this application includes an input coupler 110, a differential amplification unit 120, and an output coupler 130. The differential amplification unit 120 includes two amplification branches based on a differential structure, namely a first differential amplification unit 121 and a second differential amplification unit 122.

[0044] The working principle of the differential balanced power amplifier 100 described above is as follows: the input coupler 110 is used to distribute the power of the signal S1 to be amplified, resulting in two signals S1 to be amplified. 11 and S 12 One of the signals to be amplified, S 11 The signal can be amplified by inputting it into the first differential amplifier unit 121 to obtain the first amplified signal S. 21 The other signal to be amplified, S 12 The signal can be amplified by inputting it into the second differential amplifier unit 122 to obtain the second amplified signal S. 22 Two amplified signals S 21 and S 22 The final amplified signal S2 is obtained by combining the signals through the output coupler 130.

[0045] Since both the first differential amplifier unit 121 and the second differential amplifier unit 122 adopt a differential structure, the input signal S of the first differential amplifier unit 121 is... 11 It should be a differential signal, i.e., S 11 It should be two signals S with opposite phases (i.e., a phase difference of 180 degrees). 11+ and S 11- The difference, that is, S 11 =S 11+ -S 11- Similarly, the input signal S of the second differential amplifier unit 122 12 It is also a differential signal, i.e., S 12 It should be two signals S with opposite phases. 12+ and S 12- The difference, that is, S 12 =S 12+ -S 12- .

[0046] Based on this, such as Figure 2 As shown, to meet the signal input requirements of the first differential amplifier unit 121 and the second differential amplifier unit 122, the through port Thr of the input coupler 110 can be configured to include the positive terminal Thr+ and the negative terminal Thr- of the through port, thereby amplifying the signal S. 11 The corresponding positive phase signal S 11+ The signal to be amplified, S, can be output through the positive terminal Thr+ of the through-port. 11 The corresponding inverted signal S 11- Thr- can be output via the negative terminal of the pass-through port.

[0047] For example, the aforementioned through port Thr can be used to transmit a pair of signals (such as the aforementioned signal to be amplified S) via a twisted pair cable. 11 The corresponding positive phase signal S 11+ and the inverted signal S11- The port of the twisted pair is defined as follows: one wire in the twisted pair serves as the positive terminal Thr+ of the straight-through port, and the other wire in the twisted pair serves as the negative terminal Thr- of the straight-through port.

[0048] Similarly, the coupling port Cou of the input coupler 110 can be configured to include the positive terminal Cou+ and the negative terminal Cou-, thereby amplifying the signal S. 12 The corresponding positive phase signal S 12+ The signal to be amplified, S, can be output through the positive terminal Cou+ of the coupling port. 12 The corresponding inverted signal S 12- The output can be obtained through the negative terminal Cou- of the coupling port.

[0049] For example, the coupling port Cou can be used to transmit a pair of signals (such as the signal to be amplified S mentioned above) via a twisted pair. 12 The corresponding positive phase signal S 12+ and the inverted signal S 12- The twisted pair has one wire as the positive terminal Cou+ and the other wire as the negative terminal Cou-.

[0050] For the differential balanced power amplifier 100 described above, ideally, the differential signal S output from its through port... 11+ and S 11- The phase difference between them should be 180 degrees, and the differential signal S output from its coupling port should be... 12+ and S 12- The phase difference between them should also be 180 degrees; however, in practical applications, errors caused by device manufacturing processes may lead to a phase deviation of a certain signal, resulting in phase imbalance at the corresponding port. For example, if the signal line length corresponding to Thr+ is slightly longer than Thr-, it will cause the phase of the positive signal corresponding to Thr+ to lag, resulting in a phase difference of less than 180 degrees between Thr+ and Thr-, which means that the positive and negative terminals of the through port Thr are unbalanced.

[0051] As can be seen, in the differential balanced power amplifier 100, if the phase between the positive and negative terminals of the through port of its input coupler 110 or between the positive and negative terminals of the coupling port is not smooth, the output signal cannot meet the input signal requirements of the subsequent differential amplification unit 120 (differential signal with a phase difference of 180 degrees), thereby destroying the common-mode stability of the entire differential balanced power amplifier 100.

[0052] Similarly, in other differential power amplifiers, in order to ensure common-mode stability, it is also necessary to ensure that the positive and negative terminals of the input unit providing the differential signal are phase balanced.

[0053] In related technologies, the phase balance of power amplifiers is improved by continuously optimizing input units, such as the layout of the input coupler. However, this optimization method is not only time-consuming, but also ineffective because the actual device performance is difficult to achieve ideal conditions.

[0054] In view of this, this application provides a power amplifier that adopts a differential architecture. By setting a phase adjustment network between at least one output port of the input unit and the differential amplification unit, the positive and negative terminals of the corresponding output ports are phase adjusted so that the signals output from the positive and negative terminals meet a phase difference of 180°, thereby achieving phase balance and improving the common-mode stability of the power amplifier.

[0055] The structure and working principle of the power amplifier provided in the embodiments of this application will be described exemplarily below with reference to the accompanying drawings.

[0056] Figure 3 This is a schematic diagram of the structure of a power amplifier 200 provided for some embodiments of this application. (Refer to...) Figure 3 The power amplifier 200 may include an input unit 210, a differential amplifier unit 220, and an output unit 230.

[0057] In some embodiments, the input unit 210 includes at least one output port, which includes a positive terminal (+) and a negative output terminal (-). The input unit 210 is used to generate at least one differential signal S1' to be amplified based on the received input signal S1, and output it through its output port. The differential signal S1' to be amplified is a pair of signals with opposite phases transmitted through two signal lines, i.e., positive phase signals S1'. 1+ and the inverted signal S 1- Positive phase signal S 1+ An inverted signal S can be output through the positive terminal (+) of the corresponding output port. 1- It can be output through the negative terminal (-) of the corresponding output port; due to the positive phase signal S 1+ and the inverted signal S 1- The phases should be opposite (i.e., the phase difference is 180 degrees). Therefore, the differential signal S1' to be amplified is equivalent to the difference signal between the positive (+) and negative (-) terminals of the corresponding output ports, i.e., S1' = S 1+ -S 1- .

[0058] The differential amplifier unit 220 is coupled to the output port of the input unit 210 and is used to amplify the differential signal S1' output by the input unit 210 to obtain the corresponding initial amplified signal S2'.

[0059] Output unit 230 is coupled to differential amplifier unit 220 and is used to generate target amplified signal S2 based on the initial amplified signal S2' generated by differential amplifier unit 220. This target amplified signal S2 is the amplified signal corresponding to the input signal S1.

[0060] The input signal to the differential amplifier unit 220 should be a differential signal with a phase difference of 180 degrees. However, in practical applications, errors in the fabrication process of the input unit 210 or other factors may cause a phase imbalance between the positive and negative terminals of its output port. For example, the positive terminal might be designed with a phase of 0 degrees and the negative terminal with a phase of -180 degrees. Due to fabrication errors, the negative terminal trace might be longer, causing a 5-degree phase lag, resulting in a negative terminal phase design of -185 degrees. This leads to a phase difference between the positive and negative terminals deviating from the standard 180 degrees, resulting in a phase imbalance. Such a phase imbalance introduces common-mode components into the differential amplifier unit 220, affecting the common-mode stability of the power amplifier.

[0061] To address this issue, the power amplifier 200 further includes a phase adjustment network 240. This phase adjustment network 240 is connected in series between the output port of the input unit 210 and the differential amplifier unit 220 to adjust the phase of the output port of the input unit 210, thereby achieving phase balance between its positive and negative terminals.

[0062] In the above embodiments, to address the issue of phase imbalance between the positive and negative terminals of the output port in the input unit 210 of the differential power amplifier, a phase adjustment network 240 is connected in series between the output port of the input unit 210 and the differential amplifier unit. This phase adjustment network 240 adjusts the phase of the output port of the input unit 210, compensating for the phase deviation of its output signal and achieving phase balance at the output port of the input unit 210. This ensures that the input signal to the subsequent differential amplifier unit 220 is a differential signal with a 180-degree phase difference, preventing the introduction of common-mode components into the differential amplifier unit 220 due to phase imbalance at the output port of the input unit 210, thus improving the common-mode stability of the power amplifier. Furthermore, the above embodiments do not require changes to the structural design of the input unit 210 itself; only the corresponding phase adjustment network needs to be configured according to the degree of phase deviation between the positive and negative terminals of the input unit 210. This is simple and easy to implement, improving the optimization efficiency of the power amplifier and reducing optimization costs.

[0063] In some embodiments, the phase adjustment network 240 described above may include at least one phase adjustment sub-network. At least one of the positive (+) and negative (-) terminals of the input unit 210 is coupled to the differential amplifier unit 220 via the phase adjustment sub-network. The phase adjustment sub-network is used to perform phase adjustment on at least one of the positive and negative terminals to achieve phase balance between the positive and negative terminals.

[0064] In the above embodiments, to achieve phase balance between the positive and negative terminals of the output port of the input unit 210, a phase adjustment sub-network can be connected in series only after the positive terminal (+) (the negative terminal is directly connected to the corresponding input terminal of the differential amplifier unit 220), or a phase adjustment sub-network can be connected in series only after the negative terminal (-) (the positive terminal is directly connected to the corresponding input terminal of the differential amplifier unit 220). That is, the phase of one of the positive and negative terminals is adjusted by a phase adjustment sub-network, reducing the number of phase adjustment sub-networks, saving the space occupied by the phase adjustment network 240 in the power amplifier 200, which is conducive to the miniaturization of the power amplifier 200 and related application devices, and saving hardware costs.

[0065] In the above embodiments, in order to achieve phase balance between the positive and negative terminals of the output port of the input unit 210, corresponding phase adjustment sub-networks can be connected in series after the positive (+) and negative (-) terminals of the input unit 210. That is, the positive and negative terminals are phase adjusted by two phase adjustment sub-networks respectively, thereby improving the flexibility of phase adjustment.

[0066] In some embodiments, the power amplifier 200 described above can also incorporate a balanced architecture in addition to a differential structure, such as... Figure 4 As shown.

[0067] Reference Figure 4 In the case where the power amplifier 200 employs a combination of differential and balanced architectures, the input unit 210 may include an input coupler 210'. For example, the input coupler 210' may be a 90-degree coupler.

[0068] Input coupler 210' may include two output ports; input coupler 210' is used to perform power distribution on input signal S1 to obtain the first differential signal to be amplified S. 11 The second differential signal to be amplified S 12 And outputs the first differential signal S to be amplified through its first output port. 11 And, through its second output port, outputs the second differential signal S to be amplified. 12 .

[0069] It should be noted that the following description uses the direct port Thr as the first output port of the input coupler 210' and the coupling port Cou as the second output port of the input coupler 210' as an example for illustrative purposes.

[0070] For example, the first output port of the input coupler 210', i.e., the through port Thr, has a first positive terminal Thr+ and a first negative terminal Thr-, the first positive terminal Thr+ being used to output the first differential signal S to be amplified. 11 The corresponding positive phase signal S11+ The first negative terminal Thr- corresponds to the output of the first differential signal to be amplified, S. 11 The corresponding inverted signal S 11- The positive phase signal S 11+ and the inverted signal S 11- The phase difference is 180 degrees, therefore the first differential signal to be amplified, S... 11 Its corresponding positive phase signal S 11+ and the inverted signal S 11- The difference, i.e. S 11 =S 11+ -S 11- .

[0071] Similarly, the second output port of the input coupler 210', i.e., the coupling port Cou, has a second positive terminal Cou+ and a second negative terminal Cou-. The second positive terminal Cou+ is used to output the second differential signal S to be amplified. 12 The corresponding positive phase signal S 12+ The second negative terminal Cou- is used to output the second differential signal to be amplified, S. 12 The corresponding inverted signal S 12- The positive phase signal S 12+ and the inverted signal S 12- The phase difference is 180 degrees, therefore the second differential signal to be amplified, S 12 Its corresponding positive phase signal S 12+ and the inverted signal S 12- The difference, i.e. S 12 =S 12+ -S 12- .

[0072] In some embodiments, such as Figure 4 As shown, when the power amplifier 200 adopts a combination of differential and balanced architecture, the differential amplifier unit 220 may include two parallel sub-amplifier units, namely the first differential amplifier unit 221 and the second differential amplifier unit 222, and each sub-amplifier unit adopts a differential structure.

[0073] The first differential amplifier unit 221 can be coupled to the through port Thr of the input coupler 210', that is, to... Figure 4 The first positive terminal Thr+ and the first negative terminal Thr- shown are coupled together to receive the difference signal between the first positive terminal Thr+ and the first negative terminal Thr-, i.e., the first differential signal to be amplified S. 11 The signal is then amplified to obtain the corresponding first initial amplified signal S. 21 The second differential amplifier unit 222 can be coupled to the coupling port Cou of the input coupler 210', that is, to... Figure 4The second positive terminal Cou+ and the second negative terminal Cou- shown are coupled together to receive the difference signal between the second positive terminal Cou+ and the second negative terminal Cou-, i.e., the second differential signal to be amplified S. 12 The signal is then amplified to obtain the corresponding second initial amplified signal S. 22 .

[0074] In some embodiments, such as Figure 4 As shown, in the case where the power amplifier 200 employs a combination of differential and balanced architecture, the output unit 230 may include an output coupler 230'. Exemplarily, this output coupler 230' may be a 90-degree coupler.

[0075] Output coupler 230' is coupled to differential amplifier unit 220 and is used to amplify the first initial amplified signal S obtained by the first differential amplifier unit 221. 21 And the second initial amplified signal S through the second differential amplification unit 222 22 The signals are synthesized to obtain the target amplified signal S2, which is the amplified signal corresponding to the input signal S1.

[0076] As can be seen, when the power amplifier 200 adopts a combination of differential and balanced architecture, the input signal is distributed into two differential signals to be amplified through the input coupler in the input unit 210, i.e., S 11 and S 12 Then, the signals are amplified differentially through two sub-amplifier units arranged in parallel within the differential amplifier unit 220, resulting in two initial amplified signals corresponding one-to-one with the two differential signals to be amplified, namely S. 21 and S 22 Then, the two initial amplified signals S are amplified through the output coupler in the output unit 230. 21 and S 22 The signal is synthesized to obtain the target amplified signal S2 corresponding to the input signal S1.

[0077] In the above embodiments, the power amplifier 200 adopts a combination of differential and balanced architecture, which can retain the excellent VSWR performance of the balanced architecture, and can also utilize the suppression capability of the differential structure for harmonics and common-mode noise, thus greatly improving the purity of the signal.

[0078] In some embodiments, reference is made to Figure 4 In the case where the power amplifier 200 adopts a combination of differential and balanced architecture, the phase adjustment network 240 may include at least one first phase adjustment network, at least one of the first positive terminal Thr+ and the first negative terminal Thr- of the input coupler 210', which is coupled to the first differential amplifier unit 221 through the first phase adjustment network.

[0079] Reference Figure 4 The aforementioned phase adjustment network 240 may include two first phase adjustment networks 241 and 241'. Specifically, a first phase adjustment network 241 may be connected in series between the first positive terminal Thr+ of the input coupler 210' and the first differential amplifier unit 221 to adjust the phase of the positive-phase signal output from the first positive terminal Thr+; another first phase adjustment network 241' may be connected in series between the first negative terminal Thr- and the first differential amplifier unit 221 to adjust the phase of the inverted signal output from the first negative terminal Thr-.

[0080] In other possible embodiments, a first phase adjustment network 241 can be connected in series between the first positive terminal Thr+ and the first differential amplifier unit 221, and the first negative terminal Thr- can be directly connected to the corresponding input terminal of the first differential amplifier unit 221; alternatively, a first phase adjustment network 241' can be connected in series only between the first negative terminal Thr- and the first differential amplifier unit 221, and the first positive terminal Thr+ can be directly connected to the corresponding input terminal of the first differential amplifier unit 221. That is, the aforementioned phase adjustment network 240 may include a first phase adjustment network (i.e., 241 or 241') for phase adjustment of the signal output from one of the first positive terminal Thr+ and the first negative terminal Thr-, ensuring that the first positive terminal Thr+ and the first negative terminal Thr- satisfy a phase difference of 180 degrees, thereby achieving phase balance between the positive and negative terminals.

[0081] Similarly, refer to Figure 4 The aforementioned phase adjustment network 240 may include two second phase adjustment networks 242 and 242'. The second phase adjustment network 242 may be connected in series between the second positive terminal Cou+ and the second differential amplifier unit 222 for phase adjustment of the positive phase signal output from the second positive terminal Cou+. The second phase adjustment network 242' may be connected in series between the second negative terminal Cou- and the second differential amplifier unit 222 for phase adjustment of the inverted phase signal output from the second negative terminal Cou-.

[0082] In other possible embodiments, the phase adjustment network 240 may include a second phase adjustment network, for example, it may include only a second phase adjustment network 242 connected in series between the second positive terminal Cou+ and the second differential amplifier unit 222, or it may include only a second phase adjustment network 242' connected in series between the second negative terminal Cou- and the second differential amplifier unit 222.

[0083] In the above embodiment, at least one first phase adjustment network is set for the positive and negative terminals of the through port Thr of the input coupler 210', and at least one second phase adjustment network is set for the positive and negative terminals of its second output port. Phase adjustment is performed on the first and second output ports respectively to achieve phase balance between the positive and negative terminals of the corresponding ports, ensuring the two differential signals to be amplified, i.e., the aforementioned S... 11 and S 12 All can be input to the corresponding sub-amplifier unit with a standard phase difference of 180 degrees, avoiding the introduction of common-mode components due to phase imbalance and improving the common-mode stability of the power amplifier.

[0084] In some embodiments, the first phase adjustment networks 241 and 241' and the second phase adjustment networks 242 and 242' are phase adjustment sub-networks in the phase adjustment network 240. Figure 5 and Figure 6 A schematic diagram of the structure of any phase adjustment subnetwork is shown.

[0085] Reference Figure 5 and Figure 6 Any phase adjustment subnetwork in the phase adjustment network 240 may include one or more phase adjustment devices, including but not limited to at least one of capacitors, inductors, and transmission lines. Specifically, a capacitor causes the phase of the current signal to lead the voltage signal by 90 degrees, an inductor causes the phase of the current signal to lag the voltage signal by 90 degrees, and a transmission line causes the signal to lag due to propagation delay.

[0086] For example, the above transmission line includes a transmission line with a length of one-quarter wavelength (λ / 4), which may specifically be an open-circuit transmission line, a short-circuit transmission line, etc.

[0087] For example, the capacitor in the phase adjustment subnetwork can be a varactor diode to achieve variable capacitance.

[0088] In the above embodiments, different phase adjustment devices can cause different phase changes, and can be configured according to application requirements to adapt to different power amplifiers.

[0089] For example, when the phase adjustment subnetwork includes multiple phase adjustment devices, the multiple phase adjustment devices can be connected in at least one way, such as in series or in parallel.

[0090] For example, the phase adjustment subnetwork may include multiple inductors, such as L1~L n (n is a positive integer, n>1), these inductors can be connected in series, in parallel, or in a combination of series and parallel.

[0091] For example, the phase adjustment subnetwork may include multiple transmission lines, which may be connected in series, in parallel, or in a hybrid series-parallel connection.

[0092] For example, the phase adjustment subnetwork may include at least one inductor and at least one transmission line, which may be connected in series, in parallel, or in a combination of series and parallel connections.

[0093] For example, with n inductors L1~L n For example, for a mixed series-parallel connection, specifically, n inductors L1~L n The circuit is divided into at least two groups. Each group can contain the same or different numbers of inductors. Inductors within the same group are connected in series to form a series circuit, while series circuits from different groups are connected in parallel. For example, inductors L1 to L3 can be connected in series to form the first series circuit, and inductors L4 to L... n The first series circuit and the second series circuit are connected in parallel to form a phase adjustment sub-network.

[0094] For example, based on multiple identical or different types of phase adjustment devices, various phase adjustment sub-networks with different structures, such as RC phase shifting networks and LC phase shifting networks, can be formed by adopting different connection methods to adapt to the phase adjustment requirements of different ports.

[0095] In the above embodiments, the phase changes caused by multiple phase adjustment devices can be vector-superimposed. By configuring the number, type, and connection method of the phase adjustment devices, the superimposed phase adjustment amount can be controlled to meet the phase adjustment requirements of the corresponding port.

[0096] For example, suppose that the positive terminal phase of a certain output port of the input unit is 0 degrees and the negative terminal phase is -175 degrees. The phase balance condition of 180 degrees phase difference between the two is not met. Then, the phase adjustment sub-network connected to the negative terminal can be configured so that the corresponding total phase change is -5 degrees. This can make the phase of the negative terminal lag by 5 degrees, that is, the phase of the negative terminal is adjusted to -180 degrees, satisfying the phase difference of 180 degrees between the positive and negative terminals, and achieving phase balance between the positive and negative terminals.

[0097] In some embodiments, reference is made to Figure 5 Any phase adjustment subnetwork in the phase adjustment network 240 may include multiple series-connected transmission lines R1~R n ;reference Figure 6 Any phase adjustment subnetwork in the phase adjustment network 240 may include multiple inductors L1~L1 connected in series. n .

[0098] In other possible embodiments, multiple transmission lines / inductors may be connected in parallel or other ways to enable the phase adjustment subnetwork to achieve different phase delays.

[0099] In some embodiments, any phase adjustment subnetwork in the phase adjustment network 240 may include n1 transmission lines and n2 inductors. Here, n1 and n2 are positive integers. These transmission lines and inductors can be connected in series, parallel, or other ways. The specific values ​​of n1 and n2 and the connection methods used can be determined based on the phase adjustment amount to be achieved by the phase adjustment subnetwork.

[0100] In some embodiments, such as Figure 5 and Figure 6 As shown, one or more capacitors can be set for each phase delay device.

[0101] by Figure 5 Taking the first transmission line R1 as an example, a first capacitor C can be configured for it. 11 Fourth capacitor C 14 Among them, the first capacitor C 11 and the fourth capacitor C 14 One end of the capacitor is grounded, and the first capacitor C 11 The other end is connected to the first end of the first transmission line R1, and the fourth capacitor C 14 The other end is connected to the second end of the first transmission line R1.

[0102] In the above embodiment, the first capacitor C is used 11 and the fourth capacitor C 14 The phase lead adjustment characteristic can reduce the phase lag generated by the first transmission line R1, and achieve fine adjustment of the phase of the corresponding port.

[0103] In some embodiments, reference continues to be made to Figure 5 A second capacitor C can also be configured for the first transmission line R1. 12 and the third capacitor C 13 Among them, the second capacitor C 12 and the third capacitor C 13 One end of the capacitor is grounded, and the second capacitor C 12 The other end is controlled by the first controllable switch K 11 The third capacitor C is connected to the first end of the first transmission line R1. 13 The other end is controlled by a second controllable switch K 12 It is connected to the second end of the first transmission line R1.

[0104] In the above embodiments, by controlling the first controllable switch K 11 and the second controllable switch K 12 The closing / opening of the capacitor can selectively open / close the second capacitor C.12 and the third capacitor C 13 By connecting to the phase adjustment sub-network, the phase adjustment amount of the phase adjustment sub-network can be controlled on demand, thereby matching different input couplers 210'.

[0105] It should be noted that in practical application scenarios, when the phase adjustment sub-network includes multiple phase adjustment devices of the same or different types, the connection method is not limited to that described in the previous embodiments. It can be determined according to the required phase adjustment amount, etc. This embodiment will not describe the different connection methods one by one.

[0106] For example, during the design phase of the power amplifier 200, the power amplifier 200 can be simulated by a simulation system to determine the required phase adjustment amount of each phase adjustment sub-network. Thus, based on the required phase adjustment amount of each phase adjustment sub-network, the type, quantity, and connection relationship of the phase adjustment devices in the corresponding phase adjustment sub-network can be determined.

[0107] For example, during the testing or application phase after the production of the power amplifier 200, relevant testing instruments can be used to evaluate the common-mode stability of the power amplifier 200. When its common-mode stability does not meet the requirements, the phase adjustment amount of the phase adjustment network can be adjusted by controlling the state switching of at least one controllable switch in the phase adjustment network until the power amplifier 200 achieves better common-mode stability.

[0108] For example, during the testing or application phase described above, a spectrum analyzer can be used to test whether the power amplifier 200 experiences common-mode oscillation. If common-mode oscillation occurs, it indicates that the common-mode stability of the power amplifier 200 is poor, and the phase adjustment amount of the phase adjustment network needs to be adjusted.

[0109] For example, during the testing or application phase described above, the power performance of the power amplifier 200 can be tested using a power meter to see if it meets expectations. If it does not meet expectations, it indicates that the common-mode stability of the power amplifier 200 is poor and the phase adjustment amount of the phase adjustment network needs to be adjusted.

[0110] Figure 7 This is a schematic diagram of the structure that any sub-amplifier unit in the differential amplifier unit 220 in the embodiments of this application can adopt.

[0111] In some embodiments, at least one sub-unit of the differential amplifier unit 22, namely at least one of the first differential amplifier unit 221 and the second differential amplifier unit 222, may employ as follows: Figure 7 The structure shown can include a first-stage amplifier 202 and a second-stage amplifier 204 connected in series to achieve two-stage amplification of the corresponding signal, which can improve power gain and is suitable for scenarios with high gain requirements (such as thousands of times).

[0112] For example, the power gain of the first-stage amplifier 202 and the power gain of the second-stage amplifier 204 can be the same or different, and can be configured according to the actual application requirements.

[0113] For example, an input matching network 201 may be provided before the first-stage amplifier 202, that is, between the first-stage amplifier 202 and the input coupler 210. The input matching network 201 is used to perform impedance matching between the input coupler 210 and the first-stage amplifier 202 to reduce the signal attenuation rate and improve voltage or power transmission efficiency.

[0114] For example, an interstage matching network 203 may be provided between the first-stage amplifier 202 and the second-stage amplifier 204. The interstage matching network 203 is used to perform impedance matching between the first-stage amplifier 202 and the second-stage amplifier 204 to reduce signal attenuation and improve voltage or power transmission efficiency.

[0115] For example, an output matching network 205 may be provided after the second-stage amplifier 204, that is, between the second-stage amplifier 204 and the output coupler 230. The output matching network 205 is used to perform impedance matching between the second-stage amplifier 204 and the output coupler 230 to reduce signal attenuation and improve voltage or power transmission efficiency.

[0116] For example, the first-stage amplifier 202 and the second-stage amplifier 204 described above can both be fully differential amplifiers (FDA), that is, their input signals and output signals are both differential signals.

[0117] For example, taking the first-stage amplifier 202 as an example, the first-stage amplifier 202 may include two transistors with symmetrical characteristics. The two transistors may be connected in a common-emitter configuration. The bases of the two transistors serve as the two input terminals of the first-stage amplifier 202, respectively, receiving the positive and negative signals corresponding to the differential signal to be amplified. The collectors of the two transistors respectively output the positive and negative signals corresponding to the amplified differential signal.

[0118] For example, the output matching network 205 described above can also be used to phase-adjust the differential signal output by the second-stage amplifier 204, converting it into a single-ended output signal with one end grounded. For instance, in the first differential amplifier unit 221, the output matching network 205 can convert the differential signal output by the second-stage amplifier 204 into a single-ended first initial amplified signal S. 21In the second differential amplifier unit 222, the output matching network 205 can convert the differential signal output from the second-stage amplifier 204 into a single-ended second initial amplified signal S. 22 .

[0119] When the output unit 230 uses an output coupler 230', two of the four ports of the output coupler 230' (refer to...) Figure 1 Ports b and c in the diagram serve as the through port and coupling port, respectively, to receive the first initial amplified signal S output by the differential amplifier unit 220. 21 Second initial amplified signal S 22 The third port of output coupler 230' (refer to...) Figure 1 Port a) in the output coupler 230' is used as the output port to output the target amplified signal S2; the fourth port of the output coupler 230' is used as the isolation port (refer to...). Figure 1 Port d in the diagram is typically connected to a 50Ω resistor to prevent energy reflection.

[0120] In practical applications, the output coupler 230' is not an ideal device, and the load impedance of its isolation port is not an ideal 50Ω. Therefore, connecting a 50Ω resistor to the isolation port of the output coupler 230' does not provide ideal isolation, and may still introduce reflected signals, preventing the power amplifier 200 from achieving a satisfactory output echo, thereby affecting its power transmission efficiency.

[0121] Based on this, in some embodiments, such as Figure 8 As shown, the isolation port of the output coupler 230' can be equipped with an impedance adjustment network 250. By replacing the traditional 50Ω resistor with this impedance adjustment network 250, the load impedance Z of the isolation port of the output coupler 230' can be adjusted as needed.

[0122] In the above embodiments, by setting the impedance adjustment network 250, the load impedance Z of the isolation port of the output coupler 230' is no longer a fixed 50Ω, but can be adjusted as needed, and even complex impedance (referred to as complex impedance) can be realized, so that the load impedance of the isolation port can match the requirements of different application scenarios, ensure its isolation performance, optimize the output return performance of the power amplifier 200, and improve the power transmission efficiency of the power amplifier 200.

[0123] In some embodiments, such as Figure 9 As shown, the impedance adjustment network 250 may include at least one resistor for providing a purely resistive impedance, i.e., forming the real part Zr of the load impedance Z.

[0124] For example, in the case where the impedance adjustment network 250 includes multiple resistors, such as Figure 9 R shown 51~R 5m Multiple resistors can be connected in parallel.

[0125] For example, in the impedance adjustment network 250, a corresponding controllable switch can also be configured for at least one resistor, the controllable switch being connected in series with the corresponding resistor, such as... Figure 9 As shown, the controllable switch K 51 With electronic R 51 Series connection, controllable switch K 5m With resistance R 5m Series connection. Based on this, by controlling each controllable switch K 51 ~K 5m The closing / opening of the circuit can control the corresponding resistor R. 51 ~R 5m Selectively connecting the impedance regulation network 250 allows the real part Z of the load impedance Z to be realized. r Adjustable.

[0126] For example, such as Figure 9 As shown, the impedance adjustment network 250 also includes at least one of an inductor L5 and a capacitor C5.

[0127] For example, inductor L5, capacitor C5 and the aforementioned resistor R 51 ~R 5m They can be connected in parallel. Of course, in other possible embodiments, the inductors, capacitors and resistors in the impedance adjustment network 250 can also be connected in series or other ways. For example, a capacitor can be connected in series with a resistor to form an RC series circuit, and multiple RC series circuits can be connected in parallel.

[0128] For example, capacitor C5 can be a varactor diode to achieve a variable capacitance.

[0129] In the representation of complex impedance, the impedances of both capacitors and inductors lie on the imaginary axis of the complex plane. The impedance of a capacitor can be expressed as: The impedance of an inductor can be expressed as j / (ωC), where j is the imaginary unit. 2 =-1.

[0130] In the above embodiments, by incorporating capacitors and / or inductors into the impedance adjustment network 250, the imaginary part Z of the load impedance Z can be realized. i Thus, with resistance (such as R) 51 ~R 5m Together, they form a complex impedance of any value, i.e., Z = Z r +jZ i This allows the output coupler 230' to be adapted to different application scenarios, achieving better isolation and optimizing the output echo performance of the power amplifier 200.

[0131] It should be noted that in practical applications, when the impedance adjustment network 250 includes multiple impedance adjustment devices of the same or different types, the connection method is not limited to those described above. It can be determined according to the required impedance adjustment amount, etc. This embodiment will not elaborate on the different connection methods one by one.

[0132] In the embodiments of this application, the specific type of the controllable switches configured in the phase adjustment network 240 and impedance adjustment network 250 is not limited. In some embodiments, the controllable switches may be metal-oxide-semiconductor field-effect transistors (MOSFETs), insulated-gate bipolar transistors (IGBTs), etc. For MOSFETs or IGBTs, their on / off state can be changed by altering the switching signal received at their control terminals.

[0133] Based on the same inventive concept, embodiments of this application also provide a signal transmitting device 1000. For example... Figure 10 As shown, the signal transmitting device 1000 may include the power amplifier 200 and antenna unit 300 provided in any of the above embodiments. The output terminal of the power amplifier 200 and the antenna unit 300 may be directly connected, or a radio frequency switch 400 may be connected in series.

[0134] The target amplified signal (such as S2) output by the power amplifier 200 can be transmitted into space in the form of electromagnetic waves through the antenna unit 300 for reception by relevant receiving devices.

[0135] For example, the signal transmitting device 1000 may further include a radio frequency generation circuit 500, which is connected to the input terminal of the power amplifier 200 and is used to generate an initial radio frequency signal. The initial radio frequency signal can be used as an input signal to be amplified (such as S1) and transmitted to the power amplifier 200 for amplification.

[0136] Based on the same inventive concept, this application also provides an electronic device 1100, such as... Figure 11 As shown, the electronic device 1100 may include a baseband processing device 2000 and a signal transmitting device 1000 in the above embodiments, with the output terminal of the baseband processing device 2000 coupled to the input terminal of the signal transmitting device 1000.

[0137] For example, the baseband processing device 2000 includes a baseband unit (BBU) for outputting a baseband signal to the signal transmitting device 1000, the baseband signal carrying preset information.

[0138] For example, the radio frequency generation circuit 500 in the signal transmitting device 1000 can generate an initial radio frequency signal based on the baseband signal, and the initial radio frequency signal still carries the preset information. The power amplifier 200 in the signal transmitting device 1000 can amplify the initial radio frequency signal to obtain the target radio frequency signal, and transmit it into space through the antenna unit 300 for reception by relevant receiving devices, thereby realizing the transmission of the preset information from the electronic device 1100 to the relevant receiving devices.

[0139] For example, the electronic device 1100 provided in this application embodiment can be based on wireless fidelity (Wi-Fi) Devices using Fi technology can also be devices based on cellular network or mobile network technologies.

[0140] For example, the electronic device 1100 provided in the embodiments of this application can be a base station, terminal device, mobile phone, laptop circuit, tablet circuit, smartwatch, smart home device, smart car, etc.

[0141] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

[0142] For ease of explanation, the above description has been provided in conjunction with specific embodiments. However, the above exemplary discussion is not intended to be exhaustive or to limit the embodiments to the specific forms disclosed above. Various modifications and variations can be obtained based on the above teachings. The selection and description of the above embodiments are for the purpose of better explaining the principles and practical applications, thereby enabling those skilled in the art to better utilize the described embodiments and various different variations of embodiments suitable for specific use considerations.

Claims

1. A power amplifier, characterized in that, include: An input unit includes at least one output port, each of the output ports including a positive terminal and a negative terminal. The input unit is used to generate at least one differential signal to be amplified based on an input signal. The differential signal to be amplified includes a positive-phase signal output through the positive terminal and an inverted signal output through the negative terminal. A differential amplifier unit, coupled to the output port of the input unit, is used to amplify the differential signal to be amplified to obtain a corresponding initial amplified signal; An output unit, coupled to the differential amplifier unit, is used to generate a target amplified signal based on the initial amplified signal; At least one output port of the input unit is connected in series with the differential amplifier unit via a phase adjustment network. The phase adjustment network is used to adjust the phase of the positive and negative terminals of the corresponding output ports to achieve phase balance.

2. The power amplifier according to claim 1, characterized in that, The phase adjustment network includes at least one phase adjustment sub-network, and at least one of the positive terminal and the negative terminal is coupled to the differential amplifier unit through the phase adjustment sub-network; The phase adjustment subnetwork is used to perform phase adjustment on at least one of the positive and negative terminals to achieve phase balance between the positive and negative terminals.

3. The power amplifier according to claim 1, characterized in that, The phase adjustment network includes: a phase adjustment device; The phase adjustment device includes at least one of an inductor, a transmission line, and a capacitor.

4. The power amplifier according to claim 3, characterized in that, In the case where the phase adjustment network includes multiple phase adjustment devices, the multiple phase adjustment devices are connected in series or in parallel.

5. The power amplifier according to claim 3, characterized in that, The first terminal of the capacitor is grounded, and the second terminal of the capacitor is coupled to the inductor or the transmission line via a controllable switch.

6. The power amplifier according to any one of claims 1 to 5, characterized in that, The input unit includes an input coupler, and the input coupler includes a first output port and a second output port; The input coupler is used to perform power distribution on the input signal to obtain a first differential signal to be amplified and a second differential signal to be amplified, and outputs the first differential signal to be amplified through the first output port and the second differential signal to be amplified through the second output port.

7. The power amplifier according to claim 6, characterized in that, The output unit includes an output coupler for combining a first initial amplified signal and a second initial amplified signal output by the differential amplification unit to obtain the target amplified signal. The first initial amplified signal is obtained by amplifying the first signal to be amplified through the differential amplification unit, and the second initial amplified signal is obtained by amplifying the second signal to be amplified through the differential amplification unit. The power amplifier further includes: an impedance adjustment network; The impedance adjustment network is coupled to the isolation port of the output coupler and is used to adjust the load impedance of the isolation port.

8. The power amplifier according to claim 7, characterized in that, The impedance adjustment network includes at least one resistor, and the impedance adjustment network also includes at least one of an inductor and a capacitor; the resistor, inductor and capacitor are connected in series or in parallel.

9. A signal transmitting device, characterized in that, include: The power amplifier according to any one of claims 1 to 8.

10. An electronic device, characterized in that, include: The signal transmitting device as described in claim 9, or the power amplifier as described in any one of claims 1 to 8.

Images