Power amplifier protection circuit, supply voltage adjustment method, and electronic device

Abstract

To provide a protecting circuit of a power amplifier, an adjusting method of supplying voltage, and an electronic device.SOLUTION: A protecting circuit of a power amplifier includes: a power detecting module which detects a power voltage of a power supply and generates a trigger signal when the level of the power voltage is less than a predetermined level; a delay-controlling module which is electrically connected to the power detecting module, receives the trigger signal, and is triggered by the trigger signal to generate a plurality of delay signals; and a voltage transforming module which is electrically connected to the power supply and the delay-controlling module, receives the delay signals, and is used to transform the power voltage of the power supply into a plurality of supplying voltages. The voltage transforming module sequentially inputs the supplying voltages to the power amplifier according to the delay signals. Therefore, the power amplifier is not powered off at a predetermined timing when the power supply is abnormal, thereby avoiding the damage of the power amplifier.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a protection circuit, a voltage regulation method, and an electronic device, and more particularly to a protection circuit for a power amplifier, a supply voltage regulation method, and an electronic device. [Background technology]

[0002] In the field of communications, power amplifiers (PAs) used in remote radio units (RRUs) must be powered by multiple supply voltages. The multiple supply voltages of the power amplifiers must power and turn off different components in the power amplifiers according to the order and interval time specified in the product specifications. However, if the RRU is powered off due to an abnormality in the power supply system, the power amplifiers may not be powered off at the specified timing, which could result in burnout.

[0003] In view of this, the development of a power amplifier protection circuit, a supply voltage adjustment method, and an electronic device that can ensure that the power amplifier is turned on or off according to a predetermined sequence and interval time has become a worthy goal of research and development for related parties. Summary of the Invention [Problem to be solved by the invention]

[0004] Therefore, an object of the present invention is to provide a power amplifier protection circuit, a supply voltage adjustment method, and an electronic device that detects a power supply voltage and, in the event of an abnormal power outage, inputs a supply voltage to the power amplifier at a predetermined timing using a delay control module. [Means for solving the problem]

[0005] According to an embodiment of the structural aspect of the present invention, a power amplifier protection circuit is provided, comprising: a power detection module electrically connected to a power source, detecting a power supply voltage of the power source and generating a trigger signal when the power supply voltage is lower than a preset level; a delay control module electrically connected to the power detection module, receiving the trigger signal, and triggered by the trigger signal to generate a plurality of delay signals; and a voltage conversion module electrically connected to the power source and the delay control module, receiving the delay signals, and converting the power supply voltage of the power source into a plurality of supply voltages, wherein the voltage conversion module sequentially inputs the supply voltages to the power amplifier based on the delay signals.

[0006] According to an embodiment of the method aspect of the present invention, there is provided a supply voltage adjustment method including: a power detection step including driving a power detection module to detect a power supply voltage of a power supply, and generating a trigger signal when the power supply voltage becomes smaller than a preset level; a delay control step including driving a delay control module to generate a plurality of delay signals based on the trigger signal; a voltage conversion step including driving a voltage conversion module to convert the power supply voltage of the power supply into a plurality of supply voltages; and a supply voltage input step including driving the voltage conversion module to input these supply voltages in sequence to a power amplifier based on the delay signals.

[0007] According to another structural aspect of the present invention, there is provided an electronic device comprising: a field programmable logic gate array; a power detection module electrically connected to a power supply, detecting a power supply voltage of the power supply and generating a trigger signal when the power supply voltage becomes lower than a predetermined level; a delay control module electrically connected to the field programmable logic gate array and the power detection module, receiving the trigger signal and triggered by the trigger signal to generate a plurality of delay signals; and a voltage conversion module electrically connected to the power supply and the delay control module, receiving the delay signals and converting the power supply voltage of the power supply into a plurality of supply voltages; and a power amplifier electrically connected to the voltage conversion module, having a plurality of supply voltage pins to receive the plurality of supply voltages, and driven by the plurality of supply voltages, wherein the voltage conversion module sequentially inputs the supply voltages to the supply voltage pins based on the delay signals. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a block diagram showing a protection circuit for a power amplifier according to a first embodiment of the present invention; [Figure 2] 2 is a circuit schematic diagram showing a power supply detection module of the protection circuit of the power amplifier of FIG. 1. [Figure 3] 2 is a circuit diagram showing a delay control module of the protection circuit of the power amplifier of FIG. 1. [Figure 4] 2 is a block diagram showing a voltage conversion module of the protection circuit of the power amplifier of FIG. 1. [Figure 5] 5 is a circuit schematic diagram showing a DC-DC converter of a voltage conversion module of the power amplifier protection circuit of FIG. 4. [Figure 6] 5 is a circuit schematic diagram showing another DC-DC converter of the voltage conversion module of the power amplifier protection circuit of FIG. 4. [Figure 7]5 is a circuit schematic diagram showing a further DC-DC converter of the voltage conversion module of the power amplifier protection circuit of FIG. 4; [Figure 8A] 5 is a circuit schematic diagram showing a part of a level shifter of a voltage conversion module of the protection circuit of the power amplifier of FIG. 4. [Figure 8B] 5 is a circuit schematic diagram showing another part of the level shifter of the voltage conversion module of the power amplifier protection circuit of FIG. 4. [Figure 8C] 5 is a circuit schematic diagram showing a further part of the level shifter of the voltage conversion module of the power amplifier protection circuit of FIG. 4. [Figure 9] FIG. 4 is a block diagram illustrating an electronic device according to a second embodiment of the present invention. [Figure 10] 10 is a flowchart illustrating a supply voltage adjustment method according to a third embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0009] Please refer to FIG. 1. This is a block diagram of a protection circuit 100 for a power amplifier 20 according to a first embodiment of the present invention. The protection circuit 100 for a power amplifier 20 includes a power detection module 110, a delay control module 120, and a voltage conversion module 130. The power detection module 110 is electrically connected to the power supply 10 and detects a power supply voltage Vp1 of the power supply 10. When the power supply voltage Vp1 falls below a predetermined level, the power detection module 110 generates a trigger signal TR. The delay control module 120 is electrically connected to the power detection module 110 and receives the trigger signal TR. The delay control module 120 is triggered by the trigger signal TR to generate a plurality of delay signals DL1, DL2, DL3, and DL4. The voltage conversion module 130 is electrically connected to the power supply 10 and the delay control module 120. The voltage conversion module 130 receives the delay signals DL1, DL2, DL3, DL4 and converts the power supply voltage Vp1 of the power supply 10 into a plurality of supply voltages Vs1, Vs2, Vs3, Vs4. The voltage conversion module 130 inputs the supply voltages Vs1, Vs2, Vs3, Vs4 sequentially to a plurality of supply voltage pins of the power amplifier 20 according to the delay signals DL1, DL2, DL3, DL4.

[0010] Please refer to Figures 1 and 2 together. Figure 2 is a circuit schematic diagram showing a power supply detection module 110 of the protection circuit 100 of the power amplifier 20 of Figure 1. The power supply detection module 110 includes a resetter 112 and an optical coupler 114. The resetter 112 is electrically connected to the power supply 10 and detects the power supply voltage Vp1 of the power supply 10 to generate a reset signal Rs. The optical coupler 114 is electrically connected between the resetter 112 and the delay control module 120, and receives the reset signal Rs and converts it into a trigger signal TR. In detail, the resetter 112 may be a reset integrated circuit (reset IC), in which a detection pin (i.e., pin SENSE) of the resetter 112 is connected to a power supply voltage Vp1, and an output pin (i.e., pin RST) is connected to the power supply voltage Vp1 via two resistors (not shown). If the detection pin (i.e., pin SENSE) of the resetter 112 detects that the power supply voltage Vp1 is lower than a default value, the output pin (i.e., pin RST) of the resetter 112 outputs a reset signal Rs. Because the high and low voltage levels between the resetter 112 and the delay control module 120 are different, the reset signal Rs output from the resetter 112 cannot directly serve as the trigger signal TR of the delay control module 120. Therefore, by providing an optical coupler 114 between the resetter 112 and the delay control module 120, the high and low voltage levels between the resetter 112 and the delay control module 120 can be adjusted.

[0011] Furthermore, the first pin of the optical coupler 114 is connected to the power supply voltage Vp1 through a resistor, the second pin is connected to the pin RST of the resetter 112 through a resistor and receives the reset signal Rs. The third pin of the optical coupler 114 is connected to ground through a resistor, and the fourth pin is connected to the delay control module 120 through a resistor and is used to transmit the trigger signal TR to the delay control module 120. The fourth pin is also connected in parallel to a resistor and a capacitor. As can be seen from Figure 2, when the reset signal Rs is at a low potential, the trigger signal TR is also at a low potential.

[0012] Please refer to Figures 1 and 4 together. Figure 3 is a circuit diagram showing the delay control module 120 of the protection circuit 100 of the power amplifier 20 of Figure 1, and Figure 4 is a block diagram showing the voltage conversion module 130 of the protection circuit 100 of the power amplifier 20 of Figure 1. Specifically, the delay control module 120 may be a complex programmable logic device (CPLD). In Figure 4, the voltage conversion module 130 may include three DC-DC converters 131, 132, and 133 and one level shifter 134, but the present invention is not limited thereto. For example, the supply voltage Vs1 of the power amplifier 20 may be a bias voltage of 5 volts, the supply voltage Vs2 may be a gate voltage of −7.5 volts, the supply voltage Vs3 may be a gate-source voltage of −3.4 volts, and the supply voltage Vs4 may be a drain voltage of 28 volts, and the driving sequence among the supply voltages Vs1, Vs2, Vs3, and Vs4 is the supply voltages Vs1, Vs2, Vs3, and Vs4 in that order, and the turning-off sequence is the supply voltages Vs4, Vs3, Vs2, and Vs1 in that order, but the present invention is not limited thereto. 3, the VDD pin of the delay control module 120 is connected to a capacitor and a voltage of 1.8 volts, the GPIO#3 pin is used to detect the trigger signal TR, and the GPIO#4 and GPIO#5 pins are connected to ground via resistors. When the trigger signal TR and the GPIO#5 pin are simultaneously at high potentials, the GPIO#6, GPIO#7, GPIO#8, and GPIO#9 pins of the delay control module 120 output delay signals DL1, DL2, DL3, and DL4, respectively, to turn on the power amplifier 20. When either the trigger signal TR or the GPIO#5 pin is at low potential, the GPIO#6, GPIO#7, GPIO#8, and GPIO#9 pins of the delay control module 120 output delay signals DL1, DL2, DL3, and DL4, respectively, to turn off the power amplifier 20. Specifically, whether the delay control module 120 is turned on at high potential or low potential is set according to its specifications, but the present invention is not limited thereto. The delay signals DL1, DL2, DL3, and DL4 are used to control the driving order of the supply voltages Vs1, Vs2, Vs3, and Vs4, respectively.As a result, the protection circuit 100 for the power amplifier 20 of the present invention ensures that the supply voltages Vs1, Vs2, Vs3, and Vs4 in the power amplifier 20 are turned off at a predetermined timing when the power supply 10 abnormally loses power, thereby preventing the power amplifier 20 from burning out.

[0013] In other embodiments of the present invention, the DC-DC converter and the level shifter may be replaced with each other or changed to other voltage conversion circuits, but the present invention is not limited thereto.

[0014] Please refer to FIGS. 1, 4, and 5 together. FIG. 5 is a circuit schematic diagram showing the DC-DC converter 131 of the voltage conversion module 130 of the protection circuit 100 of the power amplifier 20 of FIG. 4. In FIG. 5, the DC-DC converter 131 may include a voltage source Vp2, a diode D1, and a step-down circuit 1312. The diode D1 has an anode terminal a and a cathode terminal b, and the anode terminal a is electrically connected to the voltage source Vp2. The voltage source Vp2 is connected to the step-down circuit 1312 via the diode D1, a ferrite bead B1, and a capacitor. The step-down circuit 1312 is electrically connected to the cathode terminal b of the diode D1 and is used to convert the voltage source Vp2 to a supply voltage Vs1, where the supply voltage Vs1 is greater than zero. Specifically, the voltage source Vp2 is a 12-volt voltage that the power supply 10 needs to convert to the step-down circuit 1312 via an additional conversion circuit (not shown). The BS and LX pins of the step-down circuit 1312 are connected to each other via a capacitor, the GND pin is grounded, the IN pin receives the voltage source Vp2 via a diode D1, and the EN pin detects the delayed signal DL1. When the delayed signal DL1 is at a high potential, the voltage source Vp2 is converted to a 5-volt supply voltage Vs1 and output from the LX pin. The output voltage can be adjusted to the desired supply voltage Vs1 by adjusting the resistance values ​​of resistors R1 and R2 of the FB pin. The protection circuit 100 for the power amplifier 20 of the present invention connects the diode D1 between the voltage source Vp2 and the supply voltage Vs1 of the DC-DC converter 131. This prevents the supply voltage Vs1 generated by the step-down circuit 1312 from rapidly decreasing to zero when the voltage source Vp2 is interrupted due to an abnormal power outage of the power supply 10.

[0015] Please refer to Figures 1, 4, and 6 together. Figure 6 is a circuit schematic diagram showing the DC-DC converter 132 of the voltage conversion module 130 of the protection circuit 100 of the power amplifier 20 of Figure 4. The DC-DC converter 132 may include a voltage source Vp2, a diode D1, a step-down circuit 1322, and an optical coupler 1324. The diode D1 has an anode terminal a and a cathode terminal b, and the anode terminal a is electrically connected to the voltage source Vp2. The voltage source Vp2 is connected to the step-down circuit 1322 via the diode D1, a ferrite bead B1, and a capacitor. The step-down circuit 1322 is electrically connected to the cathode terminal b of the diode D1 and is used to convert the voltage source Vp2 to a supply voltage Vs2. The optical coupler 1324 is electrically connected to the step-down circuit 1322 and the delay control module 120 and receives the delay signal DL2. The optical coupler 1324 inputs a supply voltage Vs2 to the power amplifier 20 based on the delay signal DL2, where the supply voltage Vs2 is less than zero. Specifically, when the supply voltage Vs2 is negative, the DC-DC converter 132 more accurately controls the output of the supply voltage Vs2 through the optical coupler 1324 when the DC-DC converter 132 is triggered by the delay signal DL2. In FIG. 6 , the first pin of the optical coupler 1324 is connected to the 1.8-volt voltage converted by the power supply 10 via a resistor and a capacitor, the second pin receives the delay signal DL2, the third pin outputs the supply voltage Vs2, and the fourth pin is connected to the pin EN of the step-down circuit 1322 and the 1.8-volt voltage converted by the power supply 10.

[0016] Furthermore, when the power supply 10 normally supplies power, the delay signal DL2 input to the optical coupler 1324 is at a high potential, the pin EN of the step-down circuit 1322 receives the 1.8 volt voltage from the optical coupler 1324, the step-down circuit 1322 is in an enable state, and the pin LX of the step-down circuit 1322 outputs a supply voltage Vs2 of −7.5 volts for transmission to the power amplifier 20. When the power supply 10 abnormally fails, the 1.8 volt voltage converted by the power supply 10 stops supplying power accordingly, the fourth pin of the optical coupler 1324 switches from the 1.8 volt voltage to a negative voltage level, the pin EN of the step-down circuit 1322 is in a disable state, and the pin LX of the step-down circuit 1322 does not output any voltage.

[0017] Please refer to Figures 1, 4, and 7 together. Figure 7 is a circuit schematic diagram showing the DC-DC converter 133 of the voltage conversion module 130 of the protection circuit 100 of the power amplifier 20 of Figure 4. The DC-DC converter 133 may include a voltage source Vp2, a diode D1, a step-down circuit 1332, and an optical coupler 1334. The diode D1 has an anode terminal a and a cathode terminal b, and the anode terminal a is electrically connected to the voltage source Vp2. The voltage source Vp2 is connected to the step-down circuit 1332 via the diode D1, a ferrite bead B1, and a capacitor. The step-down circuit 1332 is electrically connected to the cathode terminal b of the diode D1 and is used to convert the voltage source Vp2 to a supply voltage Vs3. The optical coupler 1334 is electrically connected to the step-down circuit 1332 and the delay control module 120, and receives the delay signal DL3. The optical coupler 1334 inputs a supply voltage Vs3 to the power amplifier 20 based on the delay signal DL3, where the supply voltage Vs3 is less than zero. In FIG. 7, the structure and operation of the optical coupler 1334 may be the same as those of the optical coupler 1324, and therefore will not be described here.

[0018] For example, when power supply 10 normally supplies power, delay signal DL3 input to optocoupler 1334 is at a high state potential, pin EN of step-down circuit 1332 receives a voltage of 1.8 volts from optocoupler 1334, step-down circuit 1332 is enabled, and pin LX of step-down circuit 1332 outputs a supply voltage Vs3 of −3.4 volts for transmission to power amplifier 20. When power supply 10 abnormally fails, the 1.8 volts converted by power supply 10 stops supplying power accordingly, pin 4 of optocoupler 1334 switches from a voltage of 1.8 volts to a negative voltage level, pin EN of step-down circuit 1332 is disabled, and pin LX of step-down circuit 1332 does not output a voltage.

[0019] Please also refer to Figures 1, 4, 8A, 8B, and 8C. Figures 8A, 8B, and 8C are circuit schematics showing different parts of the level shifter 134 of the voltage conversion module 130 of the protection circuit 100 for the power amplifier 20 of Figure 4, respectively. Figures 8A, 8B, and 8C show the level shifter 134 of the voltage conversion module 130 of the protection circuit 100 constituting the power amplifier 20 of Figure 4. The level shifter 134 is electrically connected to the delay control module 120, the power supply 10, and the power amplifier 20, and is used to convert the power supply 10 to a supply voltage Vs4. As can be seen from Figures 8A, 8B, and 8C, the level shifter 134 includes a connector 1341, an isolated DC converter 1342, a current detector 1343, and a voltage controller 1344. In Figure 8A, the connector 1341 is connected to a power supply voltage Vp1. The power supply voltage Vp1 is connected to terminal C via fuse F1, variable resistor RV, diode D2, transformer CR1, and capacitor. In Fig. 8B, the power supply voltage Vp1 converted by transformer CR1 in Fig. 8A is converted to a 30-volt voltage from terminal C via transformer CR2, capacitor, inductor, isolated DC converter 1342, and current detector 1343. In Fig. 8C, a voltage controller 1344 is used to convert the 30-volt voltage to the 28-volt voltage required for supply voltage Vs4, and a seventh pin of the voltage controller 1344 is connected to delay control module 120 and used to receive delay signal DL4. The voltage controller 1344 outputs supply voltage Vs4 via capacitor and diode D3 based on the delay signal DL4.

[0020] Please refer to FIGS. 1 and 9 together. FIG. 9 is a block diagram showing an electronic device 200 according to a second embodiment of the present invention. The electronic device 200 includes a field programmable gate array (FPGA) 210, a protection circuit 220, and a power amplifier 230. In the second embodiment, the protection circuit 220 may operate in the same manner as the protection circuit 100 of the power amplifier 20 according to the first embodiment, and therefore will not be described here. The electronic device 200 may be an RRU in an open-radio access network (O-RAN) architecture. The electronic device 200 may further include a radio frequency integrated circuit (not shown), a low noise amplifier (LNA) module (not shown), a receiver matching circuit (not shown), a receiver end (not shown), and a transmitter end (not shown), but the present invention is not limited thereto. The radio frequency integrated circuit, the low noise amplifier module, and the power amplifier 230 may be controlled by the field programmable logic gate array 210.

[0021] In addition, the power detection module 110, the delay control module 120 and the voltage conversion module 130 may all be electrically connected to a capacitor (not shown) with a very large capacitance, so that when an abnormal power outage occurs, the protection circuit 220 has enough time to turn off the power amplifier 230 according to a predetermined timing, thereby avoiding damage to the power amplifier 230 in the electronic device 200 and ultimately reducing the maintenance costs of the electronic device 200.

[0022] Please refer to FIGS. 1 and 10. FIG. 10 is a flowchart showing a supply voltage regulation method S100 according to a third embodiment of the present invention. The supply voltage regulation method S100 includes a power supply detection step S11, a delay control step S12, a voltage conversion step S13, and a supply voltage input step S14. The power supply detection step S11 includes driving the power supply detection module 110 to detect the power supply voltage Vp1 of the power supply 10 and generating a trigger signal TR when the power supply voltage Vp1 is lower than a preset level. The delay control step S12 includes driving the delay control module 120 to generate a plurality of delay signals DL1, DL2, DL3, and DL4 based on the trigger signal TR. The voltage conversion step S13 includes driving the voltage conversion module 130 to convert the power supply voltage Vp1 of the power supply 10 into a plurality of supply voltages Vs1, Vs2, Vs3, and Vs4. The supply voltage input step S14 includes driving the voltage conversion module 130 to input supply voltages Vs1, Vs2, Vs3, and Vs4 to the power amplifier 20 in sequence according to the delay signals DL1, DL2, DL3, and DL4.

[0023] 2 and 10. The power supply detection step S11 may further include driving the resetter 112 to detect the power supply voltage Vp1 of the power supply 10 to generate a reset signal Rs, and driving the optical coupler 114 to receive the reset signal Rs and convert it into a trigger signal TR.

[0024] See also Figure 5 and Figure 10. The voltage conversion step S13 may further include driving a step-down circuit 1312 to convert the voltage source Vp2 into a supply voltage Vs1 that is greater than zero.

[0025] 6 and 10. The voltage conversion step S13 may further include driving the step-down circuit 1322 to convert the voltage source Vp2 into a supply voltage Vs2, and driving the optical coupler 1324 to input the supply voltage Vs2 to the power amplifier 20 based on the delay signal DL2. Thus, the supply voltage adjustment method S100 of the present invention automatically controls the on / off timings of the multiple supply voltages Vs1, Vs2, Vs3, and Vs4 of the power amplifier 20 in an extremely short time, thereby shortening the time required to manually turn on / off the multiple supply voltages Vs1, Vs2, Vs3, and Vs4 and avoiding human errors caused by manual operation.

[0026] As can be seen from the above embodiments, the power amplifier protection circuit, supply voltage adjustment method, and electronic device of the present invention have the following advantages: 1. When the power supply abnormally fails, the supply voltage to the power amplifier is ensured to be turned off according to a predetermined timing, thereby preventing the power amplifier from burning out; 2. Damage to the power amplifier in the electronic device is prevented, thereby reducing the maintenance costs of the electronic device; 3. By using the timing control module to automatically control the on / off timing of multiple supply voltages to the power amplifier in an extremely short time, the time required to manually turn on / off multiple supply voltages is shortened and human error caused by manual operation is also avoided.

[0027] Although the present invention has been disclosed above based on the embodiments, the embodiments do not limit the present invention, and anyone skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention should be based on the scope defined in the appended claims. [Explanation of symbols]

[0028] 10 Power supply 20, 230 power amplifier 100, 220 protection circuit 110 Power Detection Module 112 Resetta 114, 1324, 1334 optical couplers 120 Delay Control Module 130 Voltage Conversion Module 131, 132, 133 DC-DC converter 1312, 1322, 1332 step-down circuit 134 Level Shifter 1341 Connector 1342 Isolated DC Converter 1343 Current Detector 1344 Voltage Controller 200 Electronic equipment 210 Field Programmable Logic Gate Array a Anode end b Cathode end B1 Ferrite Beads BS, EN, FB, IN, GND, GPIO#3, GPIO#4, GPIO#5, GPIO#6, GPIO#7, GPIO#8, GPIO#9, LX, SENSE, RST, VDD pins C terminal CR1, CR2 transformers D1, D2, D3 diodes DL1, DL2, DL3, DL4 delayed signals F1 fuse TR trigger signal R1, R2 resistance Rs Reset signal RV variable resistor S100 supply voltage adjustment method S11 Power detection step S12 Delay control step S13 Voltage conversion step S14 Supply voltage input step Vp1 power supply voltage Vp2 voltage source Vs1, Vs2, Vs3, Vs4 supply voltage

Claims

1. a power detection module electrically connected to the power supply, for detecting a power supply voltage of the power supply, and for generating a trigger signal when the power supply voltage is lower than a preset level; a delay control module electrically connected to the power detection module, receiving the trigger signal, and triggered by the trigger signal to generate a plurality of delay signals; a voltage conversion module electrically connected to the power supply and the delay control module, for receiving the delay signal and converting the power supply voltage of the power supply into a plurality of supply voltages; Equipped with the voltage conversion module sequentially stops providing the supply voltage to the power amplifiers based on the delay signal when the power supply is interrupted; Power amplifier protection circuit.

2. The power detection module includes: a resetter electrically connected to the power supply, detecting the power supply voltage of the power supply and generating a reset signal; an optical coupler electrically connected between the resetter and the delay control module, the optical coupler receiving the reset signal and converting it into the trigger signal; 2. The power amplifier protection circuit according to claim 1, comprising:

3. 2. The power amplifier protection circuit of claim 1, wherein the delay control module is a complex programmable logic device.

4. 2. The power amplifier protection circuit according to claim 1, wherein the voltage conversion module includes at least one of at least one DC-DC converter and at least one level shifter.

5. The at least one DC-DC converter comprises: a voltage source; a diode including a cathode terminal and an anode terminal electrically connected to the voltage source; a step-down circuit electrically connected to the cathode terminal of the diode for converting the voltage source to one of the supply voltages; Including, said one of said supply voltages is greater than zero; 5. The power amplifier protection circuit according to claim 4.

6. The at least one DC-DC converter comprises: a voltage source; a diode including a cathode terminal and an anode terminal electrically connected to the voltage source; a step-down circuit electrically connected to the cathode terminal of the diode for converting the voltage source to one of the supply voltages; an optical coupler electrically connected to the step-down circuit and the delay control module, for receiving one of the delay signals and inputting one of the supply voltages to the power amplifier based on the one of the delay signals; Including, said one of said supply voltages is less than zero; 5. The power amplifier protection circuit according to claim 4.

7. 5. The power amplifier protection circuit of claim 4, wherein the at least one level shifter is electrically connected to the delay control module, the power supply, and the power amplifier, and is used to convert the power supply to at least one of the supply voltages.

8. a power detection step, including: driving a power detection module to detect a power supply voltage of a power supply; and generating a trigger signal when the power supply voltage is lower than a preset level; a delay control step including driving a delay control module to generate a plurality of delay signals based on the trigger signal; a voltage conversion step including driving a voltage conversion module to convert the power supply voltage of the power supply into a plurality of supply voltages; a supply voltage input step, when the power supply is interrupted, including driving the voltage conversion module to stop providing the supply voltage to the power amplifier in order based on the delay signal; A supply voltage regulation method comprising:

9. The power supply detection step activating a resetter to detect the power supply voltage of the power supply and generate a reset signal; driving an optical coupler to receive the reset signal and convert it into the trigger signal; Further comprising: the resetter is electrically connected to the optical coupler, and the optical coupler is electrically connected to the delay control module; 9. The method of regulating a supply voltage according to claim 8.

10. The voltage converting step includes: further comprising driving a step-down circuit to convert a voltage source to one of the supply voltages; said one of said supply voltages is greater than zero; 9. The method of regulating a supply voltage according to claim 8.

11. The voltage converting step includes: driving a step-down circuit to convert a voltage source to one of the supply voltages; driving an optical coupler to input said one of said supply voltages to said power amplifier based on one of said delayed signals; Further comprising: said one of said supply voltages is less than zero; 9. The method of regulating a supply voltage according to claim 8.

12. a field programmable logic gate array; a protection circuit including: a power detection module electrically connected to a power supply, detecting a power supply voltage of the power supply and generating a trigger signal when the power supply voltage is lower than a preset level; a delay control module electrically connected to the field programmable logic gate array and the power detection module, receiving the trigger signal and triggered by the trigger signal to generate a plurality of delay signals; and a voltage conversion module electrically connected to the power supply and the delay control module, receiving the delay signals and converting the power supply voltage of the power supply into a plurality of supply voltages; a power amplifier electrically connected to the voltage conversion module and including a plurality of supply voltage pins for receiving the plurality of supply voltages, the power amplifier being driven by the plurality of supply voltages; Equipped with the voltage conversion module sequentially stops providing the supply voltage to the power amplifiers based on the delay signal when the power supply is interrupted; electronic equipment.

13. The power detection module includes: a resetter electrically connected to the power supply, detecting the power supply voltage of the power supply and generating a reset signal; an optical coupler electrically connected between the resetter and the delay control module, the optical coupler receiving the reset signal and converting it into the trigger signal; 13. The electronic device of claim 12, comprising:

14. 13. The electronic device of claim 12, wherein the delay control module is a complex programmable logic device.

15. The electronic device of claim 12 , wherein the voltage conversion module includes at least one of at least one DC-to-DC converter and at least one level shifter.

16. The at least one DC-DC converter comprises: When one of the supply voltages becomes greater than zero, a voltage source; a diode including a cathode terminal and an anode terminal electrically connected to the voltage source; a step-down circuit electrically connected to the cathode terminal of the diode for converting the voltage source to said one of the supply voltages; When said one of said supply voltages becomes less than zero, the voltage source; the diode including the cathode terminal and the anode terminal electrically connected to the voltage source; a step-down circuit electrically connected to the cathode terminal of the diode for converting the voltage source to said one of the supply voltages; an optical coupler electrically connected to the step-down circuit and the delay control module, for receiving one of the delay signals and inputting one of the supply voltages to the power amplifier based on the one of the delay signals; 16. The electronic device of claim 15, comprising:

17. 16. The electronic device of claim 15, wherein the at least one level shifter is electrically connected to the delay control module, the power supply, and the power amplifier, and is used to convert the power supply to at least one of the supply voltages.

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