A power control circuit, a communication device and an electronic device

Abstract

The application provides a power control circuit, a communication device and an electronic equipment. A first signal link of the power control circuit is used for outputting a communication signal. A radio frequency power amplifier tube and a voltage detection member are connected in series on the first signal link. The voltage detection member is used for detecting an actual voltage of the first signal link. One end of a second signal link is connected to the voltage detection member and is used for obtaining an actual voltage signal. The other end of the second signal link is connected to a control electrode of the radio frequency power amplifier tube. The second signal link is used for outputting a first control signal to the control electrode of the radio frequency power amplifier tube based on the actual voltage, so as to adjust the actual voltage on the first signal link. In the application, the voltage detection member is used for detecting the actual voltage of the first signal link. The second signal link outputs a control signal according to the actual voltage, and adjusts the radio frequency power amplifier tube through the control signal, so as to feedback and adjust the actual voltage of the first signal link, so as to ensure the stability of the communication signal.

Description

Technical Field

[0001] This application belongs to the field of wireless communication and radio frequency technology, and particularly relates to a power control circuit, communication device and electronic device. Background Technology

[0002] In the field of wireless communication, stable transmission of communication signals is crucial to ensuring system performance, and the strength and stability of communication signals directly affect transmission quality and reliability.

[0003] In related technologies, the signal link used to transmit communication signals is susceptible to various factors, which can cause fluctuations in the power of the signal link, resulting in unstable communication signals. Utility Model Content

[0004] The purpose of this application is to provide a power control circuit, communication device, and electronic device, which aims to solve the problem of unstable communication signals in conventional technologies.

[0005] A first aspect of this application provides a power control circuit, the power control circuit comprising:

[0006] A first signal link is used to output a communication signal, and an RF power amplifier tube and a voltage detection device are connected in series on the first signal link. The voltage detection device is used to detect the actual voltage of the first signal link, and the actual voltage is related to the strength value of the communication signal.

[0007] The second signal link has one end connected to the voltage detection device and used to acquire the actual voltage signal, which is used to characterize the voltage value of the actual voltage. The other end of the second signal link is connected to the control electrode of the RF power amplifier tube.

[0008] The second signal link is used to output a first control signal to the control electrode of the RF power amplifier tube based on the actual voltage, so as to adjust the actual voltage on the first signal link.

[0009] In some embodiments of this application, a comparator is provided on the second signal link. The comparator has a first input terminal, a second input terminal, and a first output terminal. The output terminal is electrically connected to the control electrode of the RF power amplifier tube. The first input terminal is used to receive a comparison signal, which is used to characterize a preset voltage of the first signal link. The second input terminal is used to receive a detection signal, which is related to the actual voltage signal.

[0010] The comparator is used to compare the comparison signal with the detection signal and then output the first control signal.

[0011] In some embodiments of this application, an amplifier is further provided on the second signal link. The amplifier has a third input terminal, a fourth input terminal, and a second output terminal. The third input terminal is grounded, the fourth input terminal is connected to the voltage detection device, and the second output terminal is connected to the second input terminal.

[0012] The amplifier acquires the actual voltage signal at its fourth input terminal and amplifies the actual voltage signal into the detection signal.

[0013] In some embodiments of this application, the voltage detection device is a directional coupler, which is connected to the first signal link and includes a signal output pin that is electrically connected to the second signal link to output the actual voltage.

[0014] In some embodiments of this application, the power control circuit further includes a first capacitor, one end of which is connected to the connection point between the control electrode of the RF power amplifier tube and the second signal link, and the other end of which is used to access the second control signal, which is used to control the RF power amplifier tube together with the first control signal.

[0015] In some embodiments of this application, the power control circuit includes a signal transmitting device, which is connected in series with the radio frequency power amplifier tube and the voltage detection device on the first signal link, and the signal transmitting device is used to output the communication signal.

[0016] In some embodiments of this application, the signal transmitting device is an antenna.

[0017] In some embodiments of this application, the radio frequency power amplifier tube is a MOSFET or a transistor.

[0018] A second aspect of this application also provides a communication device, the communication device including a circuit board on which the power control circuit as described above is integrated.

[0019] A third aspect of this application also provides an electronic device, the electronic device including a circuit board on which the power control circuit as described above is integrated; or the electronic device including the communication device described above.

[0020] The beneficial effects of this utility model embodiment compared with the prior art are as follows: In the above-mentioned power control circuit, communication device and electronic device, the power control circuit includes a first signal link and a second signal link; the first signal link is used to output a communication signal, and an RF power amplifier tube and a voltage detection device are connected in series on the first signal link. The voltage detection device is used to detect the actual voltage of the first signal link, and the actual voltage is related to the strength value of the communication signal; one end of the second signal link is connected to the voltage detection device and is used to acquire the actual voltage signal, which is used to characterize the voltage value of the actual voltage, and the other end of the second signal link is connected to the control electrode of the RF power amplifier tube; wherein, the second signal link is used to output a first control signal to the control electrode of the RF power amplifier tube based on the actual voltage to adjust the actual voltage on the first signal link; in this application, the actual voltage of the first signal link is detected by setting a voltage detection device, and the second signal link outputs a control signal according to the actual voltage, and adjusts the RF power amplifier tube through the control signal, thereby providing feedback adjustment to the actual voltage of the first signal link to ensure the stability of the communication signal. Attached Figure Description

[0021] Figure 1 A schematic diagram of the framework structure of a power control circuit provided in an embodiment of this application;

[0022] Figure 2 A schematic diagram of the framework structure of a power control circuit provided in another embodiment of this application;

[0023] Figure 3 A schematic diagram of the circuit structure of a power control circuit provided in an embodiment of this application;

[0024] Figure 4 A schematic diagram of the framework structure of a power control circuit provided in another embodiment of this application.

[0025] Specific element symbol explanations: 100 - First signal link, 110 - RF power amplifier tube, 120 - Voltage detection device, 200 - Second signal link, 210 - Comparator, 220 - Amplifier, Q1 - N-channel MOSFET, IC2 - Voltage comparator, ANT - Antenna, C1 - First capacitor. Detailed Implementation

[0026] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0027] It should be noted that when a component is referred to as being "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0028] It should be understood that the terms "length", "width", "upper", "lower", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0029] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0030] It's important to understand that in the field of wireless communication, stable transmission of communication signals is crucial for ensuring system performance, and the strength and stability of the communication signal directly affect transmission quality and reliability. In practical applications, the signal link used to transmit communication signals is susceptible to various factors, leading to fluctuations in signal strength.

[0031] Specifically, changes in the operating temperature of the signal link, deviations in the supply voltage, and drift in the characteristics of components within the link (such as switching transistors and sensing elements) over time all cause variations in the actual voltage within the link. Since this actual voltage is related to the strength of the communication signal, instability in the actual voltage directly leads to fluctuations in the communication signal strength, subsequently causing problems such as signal transmission interruption, increased bit error rate, or shortened communication distance. In related technologies, the communication signal output circuit cannot monitor the actual voltage changes of the signal link in real time and respond quickly to adjust accordingly. This makes it difficult to maintain the stability of the communication signal strength under continuous fluctuations in external factors, thus limiting the overall performance of the communication system.

[0032] Based on this, this application improves the related power control circuit, communication device and electronic equipment.

[0033] Please see Figure 1 , Figure 1A schematic diagram of the framework structure of the power control circuit provided in this embodiment is shown. The power control circuit of this embodiment includes a first signal link 100 and a second signal link 200. The first signal link 100 is used to output a communication signal, and an RF power amplifier tube 110 and a voltage detection device 120 are connected in series on the first signal link 100. The voltage detection device 120 is used to detect the actual voltage of the first signal link 100, and the actual voltage is related to the strength value of the communication signal. One end of the second signal link 200 is connected to the voltage detection device 120 and is used to acquire the actual voltage signal, which is used to characterize the voltage value of the actual voltage. The other end of the second signal link 200 is connected to the control electrode of the RF power amplifier tube 110. The second signal link 200 is used to output a first control signal to the control electrode of the RF power amplifier tube 110 based on the actual voltage to adjust the actual voltage on the first signal link 100.

[0034] It should be explained that the communication signal is an electrical signal transmitted through the first signal link 100, used to achieve the communication function. The RF power amplifier tube 110 is a device connected in series in the first signal link 100, and its operating state can be adjusted by the signal received by the control electrode to change the electrical characteristics of the first signal link 100. The voltage detection element 120 is a component connected in series in the first signal link 100, used to detect the actual voltage in the first signal link 100.

[0035] Understandably, the first signal link 100 can stably output a communication signal, providing a foundation for the realization of the communication function; the voltage detection device 120 can detect the actual voltage of the first signal link 100 in real time, reflecting the strength of the communication signal through the actual voltage; the second signal link 200 can acquire the actual voltage signal and generate a first control signal based on the actual voltage, which is transmitted to the control electrode of the RF power amplifier tube 110. By adjusting the operating state of the RF power amplifier tube 110 through the first control signal, the actual voltage of the first signal link 100 can be changed, thereby adjusting the strength of the communication signal. This setup forms a closed-loop control mechanism from detection to adjustment, which is beneficial for real-time response to changes in the actual voltage, ensuring that the actual voltage remains stable within the expected range, thereby maintaining the stability of the communication signal strength, reducing signal strength fluctuations caused by environmental or device factors, and improving the reliability of the power control circuit.

[0036] In some embodiments of this application, please refer to Figure 2 and Figure 3 , Figure 2 This diagram shows the framework structure of the power control circuit provided in this embodiment. Figure 3 A schematic diagram of the circuit structure of the power control circuit provided in this embodiment is shown; as follows: Figure 3As shown, taking the RF power amplifier tube 110 as the example, the directional coupler as the voltage detection device 120, the voltage comparator IC2210 as the comparator 210, and Ref Voltage as the comparison signal, the second signal link 200 in this embodiment is provided with a comparator 210. The comparator 210 has a first input terminal, a second input terminal, and a first output terminal. The output terminal is electrically connected to the control electrode of the RF power amplifier tube 110. The first input terminal is used to receive the comparison signal, which is used to characterize the preset voltage of the first signal link 100. The second input terminal is used to receive the detection signal, which is related to the actual voltage signal. The comparator 210 is used to compare the comparison signal and the detection signal and then output a first control signal.

[0037] It should be explained that the comparator 210 is an electronic component located on the second signal link 200, having a first input terminal, a second input terminal, and a first output terminal, capable of comparing two input signals and outputting corresponding control signals.

[0038] It is understandable that the comparator 210 has a comparison signal at its first input, a detection signal at its second input, and its first output electrically connected to the control electrode of the RF power amplifier tube 110. This arrangement facilitates accurate comparison between the actual voltage and the preset voltage. The comparator 210 can compare the comparison signal representing the preset voltage with the detection signal reflecting the actual voltage in real time, and output a corresponding first control signal to the control electrode of the RF power amplifier tube 110 based on the deviation between the two. This configuration makes the control logic of the second signal link 200 clearer. Direct comparison by the comparator 210 allows for rapid generation of adjustment commands, improving the control response speed of the RF power amplifier tube 110. When the actual voltage fluctuates due to external factors, the comparator 210 can promptly detect the deviation and output the corresponding first control signal to adjust the operating state of the RF power amplifier tube 110 to correct the actual voltage, ensuring it remains stable within the preset range. This maintains the stability of the communication signal strength and enhances the closed-loop control accuracy and reliability of the power control circuit.

[0039] Please refer to the embodiments described in this application. Figure 3 And see Figure 4 , Figure 4 A schematic diagram of the framework structure of the power control circuit provided in this embodiment is shown; as follows: Figure 3 Taking IC1 as an example of amplifier 220; in this embodiment, amplifier 220 is also provided on the second signal link 200. Amplifier 220 has a third input terminal, a fourth input terminal and a second output terminal. The third input terminal is grounded, the fourth input terminal is connected to the voltage detection device 120, and the second output terminal is connected to the second input terminal. The fourth input terminal of amplifier 220 acquires the actual voltage signal and amplifies the actual voltage signal into a detection signal.

[0040] It should be explained that amplifier 220 is an electronic component located on the second signal link 200, having a third input terminal, a fourth input terminal, and a second output terminal, and is capable of amplifying the input electrical signal.

[0041] Understandably, the third input terminal of amplifier 220 is grounded, the fourth input terminal is connected to voltage detection device 120, and the second output terminal is connected to the second input terminal of comparator 210. Amplifier 220 can obtain the actual voltage signal output by voltage detection device 120 through the fourth input terminal. Since the actual voltage signal may be difficult to use directly for accurate comparison due to signal link loss or small initial amplitude, amplifier 220 amplifies the actual voltage signal to generate a detection signal, which helps to enhance the amplitude and distinguishability of the signal, making the detection signal more suitable as the input signal of comparator 210 for comparison.

[0042] This setup, through the signal amplification effect of amplifier 220, improves the detection accuracy of the actual voltage signal, ensuring that comparator 210 can more accurately identify the deviation between the actual voltage and the preset voltage. The first control signal generated based on the accurate comparison result can more effectively adjust the operating state of the RF power amplifier tube 110, further optimizing the response sensitivity of the closed-loop control. This helps maintain the stability of the actual voltage in the first signal link 100, thereby ensuring a stable output of the communication signal strength and improving the control accuracy of the power control circuit.

[0043] Please refer to the embodiments described in this application. Figure 3 In this embodiment, the voltage detection device 120 is a directional coupler. The directional coupler is connected to the first signal link 100 and includes a signal output pin. The signal output pin is electrically connected to the second signal link 200 to output the actual voltage.

[0044] It should be explained that the directional coupler is connected to the first signal link 100 and is a device with signal coupling function, which can extract part of the signal energy from the first signal link 100 and output it.

[0045] The signal output pin is a pin on the directional coupler used to output signals. It is electrically connected to the second signal link 200 and can transmit the actual voltage extracted by the directional coupler to the second signal link 200.

[0046] Understandably, the directional coupler is connected to the first signal link 100, and its signal output pin is electrically connected to the second signal link 200 to output the actual voltage, which is beneficial for accurately extracting the voltage information in the first signal link 100. The directional coupler can stably transmit the extracted actual voltage to the second signal link 200 through its signal output pin without significantly affecting the normal transmission of communication signals in the first signal link 100, providing a reliable raw signal for subsequent signal processing (such as amplification and comparison).

[0047] This setup fully utilizes the directional signal extraction characteristics of the directional coupler, ensuring that the acquired actual voltage signal accurately reflects the strength of the communication signal, providing precise detection data for the closed-loop control of the second signal link 200. After being output by the directional coupler, the actual voltage is sequentially amplified by amplifier 220 and compared by comparator 210, ultimately generating a suitable control signal to adjust the RF power amplifier tube 110. This improves the control accuracy of the power control circuit in controlling the communication signal strength and ensures the stability of the output power.

[0048] Please refer to the embodiments described in this application. Figure 3 ,like Figure 3 Taking RF_IN as the second control signal as an example, the power control circuit in this embodiment also includes a first capacitor C1. One end of the first capacitor C1 is connected to the connection point between the control electrode of the RF power amplifier tube 110 and the second signal link 200. The other end of the first capacitor is used to access the second control signal. The second control signal is used to control the RF power amplifier tube 110 together with the first control signal.

[0049] Understandably, the second control signal can serve as the main control signal, stably transmitted to the control electrode of the RF power amplifier tube 110 through the first capacitor C1, providing basic regulation for the operating state of the RF power amplifier tube 110; the first control signal, as an auxiliary control signal, is generated based on the actual voltage of the first signal link 100 and can be finely adjusted based on the second control signal. The main control signal ensures the basic stability of the RF power amplifier tube 110's operating state, while the auxiliary control signal dynamically corrects for real-time changes in the actual voltage. The combination of the two is beneficial for improving the control accuracy and response speed of the RF power amplifier tube 110.

[0050] Please refer to the embodiments described in this application. Figure 3 The power control circuit of this embodiment includes a signal transmitting device, which is connected in series with the RF power amplifier tube 110 and the voltage detection device 120 on the first signal link 100. The signal transmitting device is used to output communication signals.

[0051] It should be explained that the signal transmitting device is a device connected in series on the first signal link 100. Together with the RF power amplifier tube 110 and the voltage detection device 120, it constitutes part of the first signal link 100. Its main function is to output communication signals and provide the original signal source for communication transmission.

[0052] It is understandable that the signal transmitting device can directly transmit the communication signal transmitted by the first signal link 100 to the outside; the strength of the transmitted communication signal is closely related to the actual voltage of the first signal link 100, and the series voltage detection device 120 can detect the actual voltage in real time. The control signal generated by the second signal link 200 based on the actual voltage can adjust the link state through the RF power amplifier tube 110, forming a complete closed-loop control from signal generation, transmission to transmission.

[0053] Please refer to the embodiments described in this application. Figure 3 In this embodiment, the signal transmitting device is an antenna (ANT).

[0054] It is understandable that the antenna ANT, as a signal transmitting device, is located at the outermost edge of the first signal link 100 and is connected in series with the RF power amplifier tube 110 and the voltage detection device 120. It is used to directly transmit the communication signal transmitted by the first signal link 100 to the external space and is the terminal device for external radiation of the communication signal.

[0055] Please refer to the embodiments described in this application. Figure 3 ,like Figure 3 Taking the RF power amplifier tube 110 as an example, the RF power amplifier tube 110 in this embodiment is a MOS tube or a triode.

[0056] It should be explained that a MOSFET is a metal-oxide-semiconductor field-effect transistor. It receives signals at its gate to adjust its on / off state, thereby controlling the current or voltage of the first signal link 100. A transistor is a semiconductor device with three electrodes (base, collector, and emitter). It receives signals at its base to control the conduction state between its collector and emitter, thus controlling the first signal link 100.

[0057] In some embodiments, the RF power amplifier transistor 110 is an N-channel MOSFET Q1. It can be understood that in this embodiment, the source and drain of the MOSFET are connected in series to the first signal link 100 for transmitting communication signals; the gate serves as the control electrode and is electrically connected to the output terminal of the second signal link 200 (such as the first output terminal of the comparator 210) to receive the first control signal.

[0058] Furthermore, in order to better implement the power control circuit in any of the above embodiments, based on the power control circuit described above, this application embodiment also provides a communication device, the communication device including a circuit board on which the power control circuit as described above is integrated.

[0059] Furthermore, in order to better implement the communication device in any of the above embodiments, based on the above communication device, this application embodiment also provides an electronic device, the electronic device including a circuit board on which the power control circuit as described above is integrated; or the electronic device including the communication device as described above.

[0060] In the above embodiments, the descriptions of each embodiment have different focuses. For parts that are not described in detail or recorded in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0061] The basic concepts have been described above. Obviously, for those skilled in the art, the detailed disclosure above is merely illustrative and does not constitute a limitation of this application. Although not explicitly stated herein, those skilled in the art may make various modifications, improvements, and corrections to this application. Such modifications, improvements, and corrections are suggested in this application, and therefore remain within the spirit and scope of the exemplary embodiments of this application.

[0062] Furthermore, this application uses specific terms to describe embodiments of the application. For example, "an embodiment," "one embodiment," and / or "some embodiments" refer to a particular feature, structure, or characteristic associated with at least one embodiment of the application. Therefore, it should be emphasized and noted that "an embodiment," "one embodiment," or "an alternative embodiment" mentioned twice or more in different locations in this specification do not necessarily refer to the same embodiment. In addition, certain features, structures, or characteristics in one or more embodiments of the application can be appropriately combined.

[0063] Similarly, it should be noted that, in order to simplify the description of the present application and thus aid in the understanding of one or more embodiments of the utility model, the foregoing description of the embodiments of the present application sometimes combines multiple features into a single embodiment, drawing, or description thereof. However, this disclosure method does not imply that the subject matter of the present application requires more features than those mentioned in the claims. In fact, the embodiments contain fewer features than all the features of the single embodiments disclosed above.

[0064] The above-described 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 of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.

Claims

1. A power control circuit, characterized in that, The power control circuit includes: A first signal link is used to output a communication signal, and an RF power amplifier tube and a voltage detection device are connected in series on the first signal link. The voltage detection device is used to detect the actual voltage of the first signal link, and the actual voltage is related to the strength value of the communication signal. The second signal link has one end connected to the voltage detection device and used to acquire the actual voltage signal, which is used to characterize the voltage value of the actual voltage. The other end of the second signal link is connected to the control electrode of the RF power amplifier tube. The second signal link is used to output a first control signal to the control electrode of the RF power amplifier tube based on the actual voltage, so as to adjust the actual voltage on the first signal link.

2. The power control circuit according to claim 1, characterized in that, A comparator is provided on the second signal link. The comparator has a first input terminal, a second input terminal, and a first output terminal. The output terminal is electrically connected to the control electrode of the RF power amplifier tube. The first input terminal is used to receive a comparison signal, which is used to characterize a preset voltage of the first signal link. The second input terminal is used to receive a detection signal, which is related to the actual voltage signal. The comparator is used to compare the comparison signal with the detection signal and then output the first control signal.

3. The power control circuit according to claim 2, characterized in that, An amplifier is also provided on the second signal link. The amplifier has a third input terminal, a fourth input terminal, and a second output terminal. The third input terminal is grounded, the fourth input terminal is connected to the voltage detection device, and the second output terminal is connected to the second input terminal. The amplifier acquires the actual voltage signal at its fourth input terminal and amplifies the actual voltage signal into the detection signal.

4. The power control circuit according to any one of claims 1 to 3, characterized in that, The voltage detection device is a directional coupler, which is connected to the first signal link and includes a signal output pin that is electrically connected to the second signal link to output the actual voltage.

5. The power control circuit according to any one of claims 1 to 3, characterized in that, The power control circuit further includes a first capacitor, one end of which is connected to the connection point between the control electrode of the RF power amplifier tube and the second signal link, and the other end of which is used to connect to a second control signal. The second control signal is used to control the RF power amplifier tube together with the first control signal.

6. The power control circuit according to any one of claims 1 to 3, characterized in that, The power control circuit includes a signal transmitting device, which is connected in series with the radio frequency power amplifier tube and the voltage detection device on the first signal link. The signal transmitting device is used to output the communication signal.

7. The power control circuit according to claim 6, characterized in that, The signal transmitting device is an antenna.

8. The power control circuit according to any one of claims 1 to 3, characterized in that, The RF power amplifier tube is a MOSFET or a transistor.

9. A communication device, characterized in that, The communication device includes a circuit board on which a power control circuit as described in any one of claims 1 to 8 is integrated.

10. An electronic device, characterized in that, The electronic device includes a circuit board on which a power control circuit as described in any one of claims 1 to 8 is integrated; or the electronic device includes a communication device as described in claim 9.

Images