Radio frequency power amplifier circuit and electronic equipment

Abstract

The utility model discloses a radio frequency power amplifier circuit and electronic equipment, and the radio frequency power amplifier circuit comprises a radio frequency power amplifier which is used for carrying out the power amplification of a radio frequency signal; and the plurality of voltage stabilizing units are connected in parallel, are positioned between a grid bias power supply of the radio frequency power amplifier and a grid of the radio frequency power amplifier, and are used for limiting the heat dissipation power of the radio frequency power amplifier. According to the explosion-proof equipment, the problem that the whole machine output power of the explosion-proof equipment in the related technology is limited is solved.

Description

Technical Field

[0001] This application relates to the field of explosion-proof equipment, and more particularly, to a radio frequency power amplifier circuit and an electronic device. Background Art

[0002] In the related art, for explosion-proof equipment (e.g., explosion-proof walkie-talkies), it is common to add a non-recoverable fuse to the main power supply to limit the heat dissipation of the RFPA (Radio Frequency Power Amplifier), so as to meet the explosion-proof requirements.

[0003] However, according to the explosion-proof requirements, the current of the RFPA cannot exceed one-seventh of the fuse specification, resulting in limited output power of the entire explosion-proof equipment. Moreover, even when the surface temperature is normal, the fuse is prone to burning due to various emergencies. Thus, it can be seen that the explosion-proof equipment in the related art has the problem of limited output power of the entire machine. Summary of the Utility Model

[0004] Embodiments of this application provide a radio frequency power amplifier circuit and an electronic device to at least solve the problem of limited output power of the entire machine in the explosion-proof equipment in the related art.

[0005] According to one aspect of the embodiments of this application, a radio frequency power amplifier circuit is provided, including: a radio frequency power amplifier for amplifying the power of radio frequency signals; and a plurality of voltage stabilizing units connected in parallel between the gate bias power supply of the radio frequency power amplifier and the gate of the radio frequency power amplifier for limiting the heat dissipation power of the radio frequency power amplifier.

[0006] According to another aspect of the embodiments of this application, an electronic device is further provided, and the electronic device includes the radio frequency power amplifier circuit of any one of the above.

[0007] In the embodiments of this application, by setting appropriate voltage stabilizing units to limit the heat dissipation power, the radio frequency power amplifier circuit includes: a radio frequency power amplifier for amplifying the power of radio frequency signals; and a plurality of voltage stabilizing units connected in parallel between the gate bias power supply of the radio frequency power amplifier and the gate of the radio frequency power amplifier for limiting the heat dissipation power of the radio frequency power amplifier. Since a plurality of voltage stabilizing units connected in parallel are provided to limit the heat dissipation power of the radio frequency power amplifier, the power requirements of the explosion-proof equipment can be met, and the explosion-proof requirements can also be satisfied, achieving the technical effect of improving the output power of the entire machine, and thus solving the problem of limited output power of the entire machine in the explosion-proof equipment in the related art. Description of the Drawings

[0008] The accompanying drawings described herein are used to provide a further understanding of the present application and form a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation of the present application. In the drawings:

[0009] Figure 1 is a schematic structural diagram of an optional radio frequency power amplifier circuit according to an embodiment of the present application;

[0010] Figure 2 is a schematic structural diagram of another optional radio frequency power amplifier circuit according to an embodiment of the present application;

[0011] Figure 3 is a schematic structural diagram of an optional voltage stabilizing unit according to an embodiment of the present application;

[0012] Figure 4 is a schematic structural diagram of another optional voltage stabilizing unit according to an embodiment of the present application;

[0013] Figure 5 is a schematic structural diagram of yet another optional radio frequency power amplifier circuit according to an embodiment of the present application;

[0014] Figure 6 is a schematic structural diagram of yet another optional radio frequency power amplifier circuit according to an embodiment of the present application;

[0015] Figure 7 is a schematic structural diagram of yet another optional radio frequency power amplifier circuit according to an embodiment of the present application;

[0016] Figure 8 is a schematic structural diagram of yet another optional radio frequency power amplifier circuit according to an embodiment of the present application;

[0017] Figure 9 is a schematic structural diagram of yet another optional radio frequency power amplifier circuit according to an embodiment of the present application;

[0018] Figure 10 is a schematic structural diagram of yet another optional radio frequency power amplifier circuit according to an embodiment of the present application. Detailed implementation manners

[0019] In order to enable those skilled in the art to better understand the solution of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0020] It should be noted that the terms "first", "second", etc. in the description, claims and above-mentioned drawings of this application are used to distinguish similar objects, and do not necessarily need to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of this application described here can be implemented in an order other than those illustrated or described here. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion. For example, a series of systems, products or devices included do not necessarily have to be limited to those units clearly listed, but may include other units not clearly listed or inherent to these products or devices.

[0021] In order to make explosion-proof equipment meet explosion-proof requirements, usually a non-recoverable fuse is added to the main power supply to limit the heat dissipation of the RFPA. Here, explosion-proof equipment refers to equipment that prevents explosion caused by generating sufficient heat or electric sparks under normal use or fault conditions. These devices are usually used in environments where flammable gases, dust or other flammable substances may exist.

[0022] As Figure 1 shown, a non-recoverable fuse FE (Fuse Element) is added to the main power supply to limit the heat dissipation of the radio frequency power amplifier, so as to meet the explosion-proof requirements. In Figure 1 , Vdd is the power supply voltage, Vgg is the gate bias voltage, RFPA is a radio frequency power amplifier, RFin is the radio frequency input, and RFout is the radio frequency output.

[0023] However, according to the explosion-proof requirements, the current of the radio frequency power amplifier cannot exceed one-seventh of the fuse specification, resulting in limited output power of the whole machine. Moreover, under normal surface temperature conditions, the fuse is also easily burned out due to various emergencies.

[0024] An optional solution to solve the above problems is to detect the working current through a current detection circuit to judge whether the heat dissipation of the device reaches the designed critical point. If the detection circuit detects that it exceeds the upper limit, an output control signal is used to control the drain voltage or gate voltage of the radio frequency power amplifier, so as to meet the explosion-proof requirements.

[0025] For different explosion-proof grades, multiple sets of current detection circuits need to be repeated. However, since several sets of repeated circuits need to be added, a precise and complex current detection and control circuit needs to be used to implement it. The equipment cost increases, and a large amount of PCB (Printed Circuit Board) area is occupied. The added circuits also need to be protected to meet the explosion-proof requirements, increasing the design complexity.

[0026] To at least partially solve the above problems, in this embodiment, a voltage stabilizing circuit is added to the gate. By setting an appropriate voltage stabilization to limit the thermal dissipation power, it not only meets the power requirements of the explosion-proof device (i.e., increases the transmission power of the explosion-proof device), but also meets the explosion-proof requirements. In addition, compared with adding several sets of repetitive circuits, the above setting can also reduce the circuit area and improve the reliability of the device.

[0027] Figure 2 is a circuit schematic diagram of an optional radio frequency power amplifier circuit according to an embodiment of the present application, as Figure 2 shown, the radio frequency power amplifier circuit includes:

[0028] A radio frequency power amplifier 21 for amplifying the radio frequency signal;

[0029] A voltage stabilizing circuit 22 located between the gate bias power supply of the radio frequency power amplifier and the gate of the radio frequency power amplifier for limiting the thermal dissipation power of the radio frequency power amplifier.

[0030] Here, the radio frequency power amplifier is a device for amplifying radio frequency signals, usually used in wireless communication systems, which can amplify the input low-power radio frequency signal for effective signal transmission in wireless transmission. The gate bias power supply of the radio frequency power amplifier can be used to provide a bias voltage for the gate of the radio frequency power amplifier to make the radio frequency power amplifier work stably in the normal working state.

[0031] The voltage stabilizing circuit 22 is used to provide a more stable gate voltage for the radio frequency power amplifier 21, thereby limiting the thermal dissipation power of the radio frequency power amplifier 21 (equivalent to limiting the surface temperature of the explosion-proof device), which can not only meet the power requirements of the product (increase the transmission power of the explosion-proof device), but also meet the explosion-proof requirements. It can not only avoid burning the fuse in the case of software accidental anomalies, but also reduce the circuit occupied area and improve the reliability of the product. The first end of the voltage stabilizing circuit is grounded to establish a stable reference point to avoid voltage fluctuations. The second end of the voltage stabilizing circuit is connected to a specified connection point between the gate bias power supply and the gate of the radio frequency power amplifier to provide a stable voltage output.

[0032] To improve the flexibility of the setting of the voltage stabilizing circuit 22, the voltage stabilizing circuit 22 may include a plurality of voltage stabilizing units connected in parallel. The plurality of voltage stabilizing units may be a plurality of voltage regulator devices with the same function or a plurality of voltage stabilizing sub-circuits with the same function. One end of the plurality of voltage stabilizing units connected in parallel can be grounded, and the other end of the parallel connection can be connected between the gate bias power supply of the radio frequency power amplifier and the gate of the radio frequency power amplifier. The plurality of voltage stabilizing units can stabilize the voltage of the gate of the radio frequency power amplifier at a fixed value to keep the radio frequency power amplifier in a stable working state and reduce power fluctuations and thermal dissipation.

[0033] Optionally, in this embodiment, the above radio frequency power amplifier circuit may further include, but is not limited to, at least one of the following: an input matching network for matching the impedance of the input signal source with the impedance of the input terminal of the radio frequency power amplifier to enable the amplifier to maintain maximum power transfer; an output matching network for matching the impedance of the output terminal of the radio frequency power amplifier with the impedance of the load to enable the amplifier to maintain maximum power transfer; a DC power supply voltage for providing the DC voltage and power required by the radio frequency power amplifier.

[0034] In some embodiments of the present application, the input matching network and the gate bias power supply are connected to the gate of the radio frequency power amplifier, the DC power supply voltage and the output matching network are connected to the drain of the radio frequency power amplifier, the source of the radio frequency power amplifier is grounded, the radio frequency signal can enter the gate of the radio frequency power amplifier through the input matching network, the gate bias power supply provides the required bias voltage to control the operating state of the gate to amplify the input signal, the amplified signal is output from the drain of the radio frequency power amplifier, and impedance matching is performed through the output matching network and then transmitted to the load or other circuits.

[0035] It should be noted that the explosion-proof device may include multiple radio frequency power amplifiers (for example, driver stage PA, final stage PA, etc.). The above radio frequency power amplifier circuit may be provided for each radio frequency power amplifier, or only for some radio frequency power amplifiers according to the position of the radio frequency power amplifier, explosion-proof requirements, etc. The radio frequency power amplifier circuits corresponding to different radio frequency power amplifiers may be the same or different. The thermal resistance from the device of the RFPA after potting to the air can be tested, and then a suitable regulated voltage can be set according to the gate voltage characteristics of the chip to limit the heat dissipation power.

[0036] Through the above radio frequency power amplifier circuit, a plurality of parallel voltage regulating units are used to limit the heat dissipation power of the radio frequency power amplifier, which not only meets the power requirements of the explosion-proof device (that is, increases the transmission power of the explosion-proof device), but also meets the explosion-proof requirements, improving the stability and reliability of the device.

[0037] In an exemplary embodiment, the number of voltage regulating units in the plurality of voltage regulating units can be set according to the explosion-proof requirements. Optionally, the number of voltage regulating units in the plurality of voltage regulating units can be two or three. The increase in the number of voltage regulating units can improve the stability and reliability of the circuit, reduce power fluctuations, and thus improve the explosion-proof performance of the explosion-proof device.

[0038] Optionally, the number of voltage stabilizing units among multiple voltage stabilizing units can be determined according to the explosion-proof level. The explosion-proof level can be set according to the explosion-proof requirements of explosion-proof equipment, and the number of explosion-proof levels can be multiple. For example, the explosion-proof level can be divided into a first level and a second level, where the second level is higher than the first level. For the first level, the number of voltage stabilizing units among multiple voltage stabilizing units can be two; for the second level, the number of voltage stabilizing units among multiple voltage stabilizing units can be three, and the setting of the explosion-proof level can be determined according to the needs of the manufacturer or user.

[0039] Through this embodiment, two or three voltage stabilizing units can be set according to the explosion-proof requirements, which can improve the stability and reliability of the circuit while meeting the explosion-proof requirements.

[0040] In an exemplary embodiment, the voltage stabilizing units among multiple voltage stabilizing units are all zener diodes, that is, multiple parallel-connected zener diodes are used as a voltage stabilizing circuit to limit the thermal dissipation power of the radio frequency power amplifier. The anode of the zener diode is grounded, and the cathode of the zener diode is connected between the gate bias power supply and the gate of the radio frequency power amplifier.

[0041] Here, the zener diode is a specially designed diode with a stable reverse breakdown voltage. When the zener diode is in the reverse operating state, if the voltage applied across its two ends exceeds a specific breakdown voltage, the zener diode will start to conduct, maintaining the voltage at a stable value. In the embodiment of the present application, using the zener diode as the voltage stabilizing unit can provide a stable voltage output.

[0042] For example, as Figure 3 shown, the voltage stabilizing circuit added to the gate can include 3 suitable zener diodes, that is, DE1, DE2, and DE3. Here, Figure 3 the voltage stabilizing circuit in can correspond to the second explosion-proof level. For the first level, the voltage stabilizing circuit can include 2 suitable zener diodes.

[0043] Through this embodiment, using the zener diode as the voltage stabilizing unit to provide voltage stabilization for the gate of the radio frequency power amplifier can improve the convenience of voltage stabilization of the voltage stabilizing circuit.

[0044] In an exemplary embodiment, the voltage regulator unit in the multiple voltage regulator units may be a voltage regulator sub - circuit, and the voltage regulator sub - circuit may include a first resistor, a second resistor, a third resistor, a fourth resistor, and a three - terminal voltage regulator. The first resistor is connected between the anode of the three - terminal voltage regulator and the reference terminal of the three - terminal voltage regulator. The second resistor is connected to the reference terminal of the three - terminal voltage regulator and the third resistor respectively. The third resistor is connected to the second resistor and the cathode of the three - terminal voltage regulator, and one end of the fourth resistor is connected between the second resistor and the third resistor, and the other end is connected to a control signal source. Here, the three - terminal voltage regulator is a linear voltage regulator, which can stabilize the input voltage at a set output voltage value through an internal feedback control circuit, so as to provide a stable voltage output. The control signal source can send a control signal to the three - terminal voltage regulator to adjust the voltage regulation value of the three - terminal voltage regulator and improve the voltage regulation effect of the voltage regulation circuit.

[0045] In this embodiment, the first resistor, the second resistor, and the third resistor are used to meet the requirements of forming a circuit loop, and the fourth resistor is used to adjust the voltage output by the voltage regulator unit. Optionally, the same voltage regulation circuit can be applied in a radio - frequency power amplifier circuit or in multiple radio - frequency power amplifier circuits, that is, the heat dissipation power of multiple radio - frequency power amplifiers is limited by the same voltage regulation circuit (it can be understood that the above - mentioned radio - frequency power amplifier circuit includes multiple radio - frequency power amplifiers).

[0046] For example, as Figure 4 shown, the voltage regulation circuit includes two voltage regulator sub - circuits, and each voltage regulator sub - circuit includes R1 (the first resistor), R2 (the second resistor), R3 (the third resistor), R4 (the fourth resistor), and LM431 (an example of a three - terminal voltage regulator). The voltage regulation circuit can be respectively connected to the gates of RFPA 1 and RFPA 2 to provide stable voltage for these two radio - frequency power amplifiers.

[0047] Through this embodiment, the three - terminal voltage regulator combines with multiple resistors to provide a voltage regulation function for the radio - frequency power amplifier to limit the heat dissipation of the radio - frequency power amplifier circuit, and the stability of the voltage regulation of the voltage regulation circuit can be improved.

[0048] In an exemplary embodiment, the first end of the voltage regulation circuit is grounded, and the second end of the voltage regulation circuit is connected to a specified connection point between the gate bias power supply and the gate of the radio - frequency power amplifier. In addition, the radio - frequency power amplifier circuit may further include: a fifth resistor, which is used to limit the current flowing through the multiple voltage regulator units to ensure the safe operation of the voltage regulator unit and the entire circuit, and avoid problems such as device damage or overheating caused by excessive current. Wherein, the first end of the fifth resistor is connected to the gate bias power supply, and the second end of the fifth resistor is connected to the specified connection point, and the first end of the fifth resistor is connected to the gate bias power supply.

[0049] For example, as Figure 5As shown, the voltage stabilizing circuit further includes R5 (the fifth resistor) for limiting the current flowing through DE1, DE2, and DE3. Here, in addition to Figure 5 the radio frequency power amplifier circuit shown in

[0050] By setting a means for limiting the current flowing through the voltage stabilizing circuit at the output end of the gate bias power supply, the same applies to other similar radio frequency power amplifier circuits, which can improve the stability of the voltage stabilization of the voltage stabilizing circuit.

[0051] In an exemplary embodiment, the first end of the voltage stabilizing circuit is grounded, and the second end of the voltage stabilizing circuit is connected to a specified connection point between the gate bias power supply and the gate of the radio frequency power amplifier. In addition, the radio frequency power amplifier circuit may further include: a sixth resistor and a seventh resistor for dividing the voltage of multiple voltage stabilizing units, so that the voltage stabilization value of the voltage stabilizing circuit meets the expectation. Among them, the first end of the sixth resistor is connected to the specified connection point, the second end of the sixth resistor is connected to the gate of the radio frequency power amplifier through an eighth resistor, the first end of the seventh resistor is grounded, and the second end of the seventh resistor is connected to the second end of the sixth resistor.

[0052] Optionally, the sixth resistor and the seventh resistor may exist alone in the circuit, or exist together in the circuit, or be combined with the fifth resistor (the radio frequency power amplifier circuit may include at least one of the fifth resistor, the sixth resistor, and the seventh resistor), or other resistors may be introduced. By different combination methods and connection methods of the resistors, various different technical effects such as limiting the current flowing through multiple voltage stabilizing units and dividing the voltage of multiple voltage stabilizing units can be achieved according to user needs, and this application embodiment does not limit this.

[0053] For example, as Figure 6 shown, the voltage stabilizing circuit further includes R6 (the sixth resistor) and R7 (the seventh resistor) for dividing the voltage of the voltage stabilizing circuit to ensure that the voltage stabilization value of the voltage stabilizing circuit is appropriate, and R6 is connected to the gate of the RFPA through R8 (the eighth resistor). As Figure 7 shown, the voltage stabilizing circuit may also include only R7 and not include R6.

[0054] Through this embodiment, two resistors for dividing the voltage of the voltage stabilizing unit can be introduced into the radio frequency power amplifier circuit, which can improve the reliability of the voltage stabilization of the voltage stabilizing circuit; at the same time, the voltage stabilization requirement for the voltage stabilizing circuit can also be reduced.

[0055] In an exemplary embodiment, the radio frequency power amplifier circuit may further include: a capacitor, one end of the capacitor is grounded, and the other end is connected between the second end of the sixth resistor and the eighth resistor. For other deformations of the radio frequency power amplifier circuit (for example, including at least part of the fifth resistor, the sixth resistor, and the seventh resistor), the other end of the capacitor may also be connected to the designated connection point as described above, one end of the fifth resistor, or other connection positions. The number of the capacitors may be one or more. Here, in the radio frequency power amplifier circuit, grounding one end of the capacitor can help achieve impedance matching to adjust the impedance matching of the circuit and improve the efficiency and quality of signal transmission; at the same time, the capacitor can also play a role in filtering and coupling to optimize the signal transmission effect and stability.

[0056] Optionally, the number of the capacitors may be three. By setting multiple capacitors, the requirements for the accuracy of a single capacitor and the capacitor parameters can be reduced, and the flexibility of capacitor setting can be improved. In addition, at least part of the multiple capacitors can also be combined with other devices (for example, resistors, inductors) to meet different requirements for the circuit.

[0057] For example, as Figure 8 shown, three capacitors in parallel are set before R8. The capacitance values of the three capacitors may be the same or different, and can be set according to the circuit requirements.

[0058] Through this embodiment, setting at least one capacitor in the radio frequency power amplifier can improve the stability and reliability of the circuit operation.

[0059] In an exemplary embodiment, for the case where the number of the capacitors is three, the three capacitors may adopt the setting method as Figure 8 shown or a similar setting method. The three capacitors may be sequentially arranged along the gate bias power supply to the gate of the radio frequency power amplifier. Optionally, the radio frequency power amplifier circuit may further include a ninth resistor, and the ninth resistor may be located between the first capacitor and the second capacitor, that is, both ends of the ninth resistor are respectively connected to one end of a capacitor.

[0060] For the case where the radio frequency power amplifier circuit includes the sixth resistor, the first end of the ninth resistor is connected to the second end of the sixth resistor, and the second end of the ninth resistor is connected to the eighth resistor. Correspondingly, one end of the three capacitors is grounded. Among them, the other end of the first capacitor is connected to the first end of the ninth resistor, and the other ends of the second capacitor and the third capacitor are both connected to the second end of the ninth resistor. Among them, the first capacitor and the ninth resistor can form a resistor-capacitor parallel circuit, which can play a role in filtering and impedance matching, that is, adjusting the impedance in the circuit to ensure the matching and efficiency of signal transmission. The capacitor can also be used as a filtering element to improve the signal quality; the second capacitor and the third capacitor can meet the need to form a circuit loop.

[0061] For example, as Figure 9 and 10 shown, a resistor R9 (ninth resistor) is provided between capacitors C1 and C3, which can form a resistor-capacitor parallel circuit with C1 to play a role in filtering and impedance matching.

[0062] Through this embodiment, by setting up a resistor-capacitor parallel circuit to play a role in filtering and impedance matching, the stability and reliability of the circuit operation can be improved.

[0063] According to another aspect of the embodiments of the present application, an electronic device is further provided. The electronic device can be an explosion-proof device. The electronic device can include the radio frequency power amplifier circuit of any one of the foregoing embodiments. The number of radio frequency power amplifier circuits can be one or more, and the radio frequency power amplifier circuits corresponding to different radio frequency power amplifiers can be the same or different. In addition to the radio frequency power amplifier circuit, the electronic device can also include electronic components for realizing other functions, which are not limited in this embodiment.

[0064] Optionally, the above electronic device can be a walkie-talkie. For example, an explosion-proof walkie-talkie, or a wireless transmitter, or other electronic devices with temperature control requirements or explosion-proof requirements, so as to improve the product performance.

[0065] Taking the explosion-proof walkie-talkie as an example, a voltage stabilizing circuit is added to the gate of the radio frequency power amplifier (such as the driver stage PA, the final stage PA, etc.). For the first level (which can be defined as ib), only 2 suitable voltage stabilizing diodes or voltage stabilizing units with the same function need to be added to meet the requirements of the explosion-proof surface temperature. For the second level (which can be defined as ia), only 3 suitable voltage stabilizing diodes or voltage stabilizing units with the same function need to be added to meet the requirements of the explosion-proof surface temperature. It can not only simplify the design of the explosion-proof walkie-talkie, improve the radio frequency power of the explosion-proof walkie-talkie, but also increase the reliability of the circuit.

[0066] Optionally, the electronic device can further include a memory, a processor, and a transmission device. A computer program is stored in the memory 1202, and the processor is configured to execute each step allowed by the walkie-talkie through the computer program. Among them, the memory can be used to store software programs and modules. The processor runs the software programs and modules stored in the memory to execute various functional applications and data processing. The memory can include a high-speed random access memory, and can also include a non-volatile memory, such as one or more magnetic storage devices, flash memories, or other non-volatile solid-state memories.

[0067] In some examples, the memory may further include a memory remotely set with respect to the processor, and these remote memories can be connected to the terminal through a network. Examples of the above-mentioned network include but are not limited to the Internet, intranet, local area network, mobile communication network, and combinations thereof. Among them, the memory can specifically but not limitedly be used to store relevant data.

[0068] Optionally, the above-mentioned transmission device is used to receive or send data via a network. Specific examples of the above-mentioned network may include a wired network and a wireless network. In one example, the transmission device includes a network adapter (Network Interface Controller, NIC), which can be connected to other network devices and routers through a network cable, so as to communicate with the Internet or local area network. In one example, the transmission device is a radio frequency module, which is used to communicate with the Internet wirelessly.

[0069] In addition, the above-mentioned electronic device further includes: a connection bus for connecting each module component in the above-mentioned electronic device.

[0070] The serial numbers of the above-mentioned embodiments of the present application are only for description and do not represent the advantages or disadvantages of the embodiments.

[0071] If the integrated unit in the above-mentioned embodiments is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in the above-mentioned computer-readable storage medium. Based on such an understanding, the technical solution of the present application, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions for causing one or more computer devices (which can be a personal computer, server, or network device, etc.) to execute all or part of the steps of the above-mentioned methods in various embodiments of the present application.

[0072] In the above-mentioned embodiments of the present application, the descriptions of each embodiment have their own emphases. For the parts not detailed in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0073] The unit described as a separate component may or may not be physically separated, and the component shown as a unit may or may not be a physical unit, that is, it may be located in one place or distributed to multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0074] In addition, in each embodiment of the present application, each functional unit may be integrated into one processing unit, may exist separately as individual physical units, or at least two units may be integrated into one unit. The above-mentioned integrated units may be implemented in the form of hardware or in the form of software functional units.

[0075] The above are only optional implementation manners of the present application. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present application, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present application.

Claims

1. A radio frequency power amplifier circuit, characterized in that: include: A radio frequency power amplifier, used for amplifying the power of radio frequency signals; A plurality of voltage stabilizing units connected in parallel are located between the gate bias power supply of the RF power amplifier and the gate of the RF power amplifier and are used to limit the heat dissipation power of the RF power amplifier.

2. The radio frequency power amplifier circuit according to claim 1, characterized in that: The number of the voltage stabilizing units in the plurality of voltage stabilizing units is two or three.

3. The radio frequency power amplifier circuit according to claim 1, characterized in that: The voltage stabilizing unit comprises a voltage stabilizing diode, an anode of the voltage stabilizing diode is grounded, and a cathode of the voltage stabilizing diode is connected between the gate bias power supply and the gate of the radio frequency power amplifier.

4. The radio frequency power amplifier circuit according to claim 1, characterized in that: The voltage stabilizing unit includes a first resistor, a second resistor, a third resistor, a fourth resistor and a three-terminal voltage stabilizer, wherein: The anode of the three-terminal regulator is grounded, and the cathode of the three-terminal regulator is connected between the gate bias power supply and the gate of the RF power amplifier; The first resistor is connected to the anode of the three-terminal regulator and the reference terminal of the three-terminal regulator; The second resistor is connected to the reference terminal of the three-terminal regulator and the third resistor; The third resistor is connected to the second resistor and the cathode of the three-terminal regulator; A first end of the fourth resistor is connected between the second resistor and the third resistor, and a second end of the fourth resistor is connected to a control signal source.

5. The radio frequency power amplifier circuit according to claim 1, characterized in that: The first ends of the plurality of voltage stabilizing units are grounded, and the second ends of the plurality of voltage stabilizing units are connected to a designated connection point between the gate bias power supply and the gate of the RF power amplifier; The radio frequency power amplifier circuit also includes: A fifth resistor is used to limit the current flowing through the multiple voltage stabilizing units, wherein a first end of the fifth resistor is connected to the gate bias power supply, and a second end of the fifth resistor is connected to the designated connection point.

6. The radio frequency power amplifier circuit according to any one of claims 1 to 5, characterized in that: The first ends of the plurality of voltage stabilizing units are grounded, and the second ends of the plurality of voltage stabilizing units are connected to a designated connection point between the gate bias power supply and the gate of the RF power amplifier; The radio frequency power amplifier circuit also includes: The sixth resistor and the seventh resistor are used to divide the voltage of the plurality of voltage stabilizing units, wherein the The first end of the sixth resistor is connected to the designated connection point, the second end of the sixth resistor is connected to the gate of the RF power amplifier through the eighth resistor, the first end of the seventh resistor is grounded, The second end of the seventh resistor is connected to the second end of the sixth resistor.

7. The radio frequency power amplifier circuit according to claim 6, characterized in that: The radio frequency power amplifier circuit also includes: A plurality of capacitors are connected in parallel, wherein a first end of each of the capacitors is grounded, and a second end is connected between the second end of the sixth resistor and the eighth resistor.

8. The radio frequency power amplifier circuit according to claim 7, characterized in that: The radio frequency power amplifier circuit further includes a ninth resistor, wherein: The ninth resistor is connected in parallel between the plurality of capacitors, a first end of the ninth resistor is connected to a second end of the sixth resistor, and a second end of the ninth resistor is connected to the eighth resistor.

9. An electronic device, characterized in that: The electronic device comprises the radio frequency power amplifier circuit according to any one of claims 1 to 8.

10. The electronic device according to claim 9, characterized in that: The electronic device is a walkie-talkie.

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