Radio frequency module and protection method thereof, communication device and readable storage medium

Abstract

The application relates to a radio frequency module and a protection method thereof, a communication device and a readable storage medium. The radio frequency module comprises a first power supply circuit, a second power supply circuit, a power amplification circuit, a switch circuit and a comparison circuit. The first end of the switch circuit is connected with the first power supply circuit. The power amplification circuit is connected with the second end of the switch circuit, a radio frequency transceiver and an antenna respectively, and is used for performing power amplification on a received radio frequency signal under the action of a first power supply signal of the first power supply circuit. The first end of the comparison circuit is used for acquiring the first power supply signal. The second end of the comparison circuit is used for acquiring a second power supply signal of the second power supply circuit. The output end of the comparison circuit is used for outputting an off signal in the case that the signal comparison result of the first power supply signal and the second power supply signal is a first comparison result, so that the switch circuit is timely disconnected from the power supply path in the scene of a small probability of burning of the power amplification circuit.

Description

Technical Field

[0001] This application relates to the field of antenna technology, and in particular to a radio frequency module and its protection method, a communication device and a readable storage medium. Background Technology

[0002] In related radio frequency technologies, power amplifiers are used to amplify the weak signals generated by radio frequency transceivers into high-power signals, which are then radiated into free space via antennas to communicate with base stations.

[0003] However, because the power amplifier in the RF transmission path is a high-power device, it often operates under high temperature, high power, and high current conditions, making it prone to burnout even in small-scale scenarios. When the power amplifier burns out, the continuous abnormally high current can cause the communication equipment to overheat severely, resulting in a rise in surface temperature and affecting user experience. Summary of the Invention

[0004] This application provides a radio frequency module and its protection method, a communication device and a readable storage medium, which can avoid continuous abnormal high current and improve the problem of severe overheating of communication devices under abnormal production scenarios.

[0005] The first aspect of this application provides a radio frequency module, including:

[0006] A first power supply circuit is used to provide a first power supply signal;

[0007] The second power supply circuit is used to provide the second power supply signal;

[0008] A switching circuit, wherein the first terminal of the switching circuit is connected to the first power supply circuit;

[0009] A power amplifier circuit, wherein the power supply terminal of the power amplifier circuit is connected to the second terminal of the switching circuit, the input terminal of the power amplifier circuit is used to connect to the radio frequency transceiver, the output terminal of the power amplifier circuit is used to connect to the antenna, and the power amplifier circuit is used to amplify the power of the received radio frequency signal under the action of the first power supply signal.

[0010] A comparator circuit is provided, wherein a first terminal of the comparator circuit is used to acquire the first power supply signal on the power supply path between the first power supply circuit and the power amplifier circuit, a second terminal of the comparator circuit is connected to the second power supply circuit, and an output terminal of the comparator circuit is connected to the controlled terminal of the switching circuit. The comparator circuit is used to output a turn-off signal when the signal comparison result between the first power supply signal and the second power supply signal is a first comparison result, so that the switching circuit disconnects the power supply path.

[0011] A second aspect of this application provides a method for protecting an RF module, comprising:

[0012] Acquire the first power supply signal on the power supply path between the first power supply circuit and the power amplifier circuit, and acquire the second power supply signal of the second power supply circuit;

[0013] If the signal comparison result between the first power supply signal and the second power supply signal is the first comparison result, a shutdown signal is output so that the switching circuit disconnects the power supply path.

[0014] Wherein, the first terminal of the switching circuit is connected to the first power supply circuit, the power supply terminal of the power amplifier circuit is connected to the second terminal of the switching circuit, the input terminal of the power amplifier circuit is used to connect to the radio frequency transceiver, the output terminal of the power amplifier circuit is used to connect to the antenna, and the power amplifier circuit is used to amplify the power of the received radio frequency signal under the action of the first power supply signal.

[0015] A third aspect of this application provides a communication device, comprising:

[0016] The radio frequency module as described above.

[0017] A fourth aspect of this application provides a communication device, comprising:

[0018] A first power supply circuit is used to provide a first power supply signal;

[0019] The second power supply circuit is used to provide the second power supply signal;

[0020] A switching circuit, wherein the first terminal of the switching circuit is connected to the first power supply circuit;

[0021] A power amplifier circuit, wherein the power supply terminal of the power amplifier circuit is connected to the second terminal of the switching circuit, the input terminal of the power amplifier circuit is used to connect to the radio frequency transceiver, the output terminal of the power amplifier circuit is used to connect to the antenna, and the power amplifier circuit is used to amplify the power of the received radio frequency signal under the action of the first power supply signal.

[0022] A memory and a processor, wherein the memory stores a computer program, and the processor executes the computer program to implement the steps of the protection method as described above.

[0023] The fifth aspect of this application provides a computer-readable storage medium having a computer program stored thereon, characterized in that the computer program, when executed by a processor, implements the steps of the protection method described above.

[0024] The aforementioned radio frequency (RF) module, its protection method, communication equipment, and readable storage medium include an RF module comprising a first power supply circuit, a second power supply circuit, a power amplifier circuit, a switching circuit, and a comparator circuit. The first power supply circuit provides a first power supply signal; the second power supply circuit provides a second power supply signal; a first terminal of the switching circuit is connected to the first power supply circuit; the power supply terminal of the power amplifier circuit is connected to the second terminal of the switching circuit; the input terminal of the power amplifier circuit is connected to an RF transceiver; the output terminal of the power amplifier circuit is connected to an antenna; the power amplifier circuit amplifies the received RF signal under the influence of the first power supply signal; the first terminal of the comparator circuit acquires the first power supply signal; the second terminal of the comparator circuit is connected to the second power supply circuit; the output terminal of the comparator circuit is connected to the controlled terminal of the switching circuit; the comparator circuit outputs a shutdown signal when the signal comparison result of the first power supply signal and the second power supply signal is the first comparison result, thereby causing the switching circuit to disconnect the power supply path. This ensures timely disconnection of the power supply path in scenarios where the power amplifier circuit is unlikely to burn out, preventing severe overheating caused by continuous abnormally high current in the power amplifier circuit. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is one of the structural schematic diagrams of the radio frequency module in one embodiment;

[0027] Figure 2 This is a second schematic diagram of the structure of the radio frequency module in one embodiment;

[0028] Figure 3 This is the third schematic diagram of the structure of the radio frequency module in one embodiment;

[0029] Figure 4 This is the fourth schematic diagram of the structure of the radio frequency module in one embodiment;

[0030] Figure 5 This is the fifth schematic diagram of the structure of the radio frequency module in one embodiment;

[0031] Figure 6 This is the sixth schematic diagram of the structure of the radio frequency module in one embodiment;

[0032] Figure 7 This is the seventh schematic diagram of the structure of the radio frequency module in one embodiment;

[0033] Figure 8 This is the eighth schematic diagram of the structure of the radio frequency module in one embodiment;

[0034] Figure 9 This is the ninth schematic diagram of the structure of the radio frequency module in one embodiment;

[0035] Figure 10 This is one of the flowcharts for a protection method of an RF module in one embodiment;

[0036] Figure 11 This is a second flowchart of a protection method for a radio frequency module in one embodiment;

[0037] Figure 12 This is the third flowchart of a protection method for a radio frequency module in one embodiment;

[0038] Figure 13 This is a schematic diagram of the structure of a communication device in one embodiment. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of 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 not intended to limit the scope of this application.

[0040] It is understood that the terms "first," "second," etc., used herein may be used to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish one element from another 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 at least one of that feature. In the description of this application, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0041] It should be noted that when a component is said to be "set on" another component, it can be directly on the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component.

[0042] The radio frequency module involved in this application embodiment can be applied to communication devices with wireless communication functions. These communication devices can be handheld devices, in-vehicle devices, wearable devices, computing devices, or other processing devices connected to a wireless modem, as well as various forms of user equipment (UE), such as mobile phones, mobile stations (MS), etc. For ease of description, the devices mentioned above are collectively referred to as communication devices.

[0043] like Figure 1 As shown, in one embodiment, the radio frequency module 10 provided in this application includes a first power supply circuit 110, a second power supply circuit 120, a power amplifier circuit 130, a switching circuit 140, and a comparator circuit 150.

[0044] A first power supply circuit 110 provides a first power supply signal; a second power supply circuit 120 provides a second power supply signal; a switching circuit 140 has its first terminal connected to the first power supply circuit 110; a power amplifier circuit 130 has its power supply terminal connected to the second terminal of the switching circuit 140, its input terminal connected to an RF transceiver, and its output terminal connected to an antenna, and is used to amplify the power of the received RF signal under the action of the first power supply signal; a comparator circuit 150 has its first terminal acquiring the first power supply signal on the power supply path between the first power supply circuit 110 and the power amplifier circuit 130, its second terminal connected to the second power supply circuit, and its output terminal connected to the controlled terminal of the switching circuit 140, and is used to output a shutdown signal when the signal comparison result of the first power supply signal and the second power supply signal is the first comparison result, so that the switching circuit 140 disconnects the power supply path.

[0045] The first power supply circuit 110 provides a first power supply signal to the power amplifier circuit 130 and the comparator circuit 150. The first power supply circuit 110 may include, for example, a battery and a power management IC (PMIC) connected to the battery to supply power from the battery to the power amplifier circuit 130. The second power supply circuit 120 provides a second power supply signal to the comparator circuit 150. The second power supply circuit 120 may also include, for example, a battery and a power management IC (PMIC) connected to the battery to supply power from the battery to the comparator circuit 150. It should be noted that in practical applications, the first power supply circuit 110 and the second power supply circuit 120 may be the same power supply circuit or two different power supply circuits.

[0046] In this embodiment, the power amplifier circuit 130 has its power supply terminal connected to the first power supply circuit 110 via a switching circuit 140. The input terminal of the power amplifier circuit 130 is connected to a radio frequency transceiver, and its output terminal is connected to an antenna. Under the action of the first power supply signal from the first power supply circuit 110, the power amplifier circuit 130 amplifies the signal output from the radio frequency transceiver and outputs it to the antenna for transmission. The antenna can support the reception and transmission of radio frequency signals in different frequency bands. Any suitable type of antenna can be used; in this embodiment, the type of antenna is not limited. The power amplifier circuit 130 includes a power amplifier (PA), or may include a power amplifier and other functional devices. It should be noted that when the power amplifier circuit 130 includes a power amplifier and other devices, the power supply path between the first power supply circuit 110 and the power amplifier circuit 130 is still understood as the power supply path between the first power supply circuit 110 and the power amplifier.

[0047] In this circuit, the first terminal of the switching circuit 140 is connected to the first power supply circuit 110, the second terminal of the switching circuit 140 is connected to the power amplifier circuit 130, and the controlled terminal of the switching circuit 140 is connected to the output of the comparator circuit 150. Optionally, the default state of the switching circuit 140 is the on state. When the switching circuit 140 is in the default state, the power supply path is on, so that the first power supply circuit 110 provides a first power supply signal to the power amplifier circuit 130 and the comparator circuit 150. Optionally, the switching circuit 140 includes at least one switching device, which may be a normally closed switch or a switching transistor, and may also include other devices with switching functions, without further limitation. Taking a normally closed switch as an example, the normally closed moving contact of the normally closed switch is connected to the first power supply circuit 110, the normally closed stationary contact of the normally closed switch is connected to the power amplifier circuit 130, and the controlled contact of the normally closed switch is connected to the output of the comparator circuit 150. In the default state, the normally closed switch is in the closed state; when the normally closed switch receives a turn-off signal, the normally closed switch is in the open state.

[0048] The comparator circuit 150 has a first terminal connected to a power supply path to acquire a first power supply signal on the power supply path between the first power supply circuit 110 and the power amplifier circuit 130. The second terminal of the comparator circuit 150 is connected to the second power supply circuit 120 to acquire a second power supply signal. The output terminal of the comparator circuit 150 is connected to the controlled terminal of the switch circuit 140. The first terminal of the comparator circuit 150 can be connected to the power supply path by connecting it to both the first power supply circuit 110 and the first terminal of the switch circuit 140 (e.g.,...). Figure 1 (As shown), or the first terminal of the comparator circuit 150 can be connected to the second terminal of the switching circuit 140 and the power supply terminal of the power amplifier circuit 130 respectively (e.g. Figure 2 (As shown).

[0049] The comparator circuit 150 compares the first power supply signal and the second power supply signal. If the comparison result of the first power supply signal and the second power supply signal is the first comparison result, it outputs a shutdown signal to disconnect the power supply path via the switch circuit 140. The first comparison result refers to a pre-set comparison result related to the parameters of the first power supply signal and the second power supply signal, indicating that the power amplifier circuit 130 is currently in a burnt-out state. When the comparison result of the first power supply signal and the second power supply signal is the first comparison result, it indicates that the power amplifier circuit 130 is currently in a burnt-out state. Since the power amplifier in the power amplifier circuit 130 is a high-power device, it frequently operates under high temperature, high power, and high current conditions, and a small probability of burnt-out may occur. When the power amplifier burns out, an internal short circuit will occur, leading to abnormal power supply signals, abnormally high current in the power supply path, and severe overheating. When the comparator circuit 150 compares the first power supply signal and the second power supply signal and the comparison result is the first comparison result, the comparator circuit 150 outputs a shutdown signal so that the switch circuit 140 disconnects the power supply path according to the shutdown signal. This can prevent the power amplifier circuit 130 from continuously drawing abnormally large current, which could lead to severe overheating.

[0050] Optionally, the first comparison result may include the voltage value of the first power supply signal being less than the voltage value of the second power supply signal, or the current value of the first power supply signal being greater than the current value of the second power supply signal.

[0051] Taking the example where the voltage value of the first power supply signal is less than the voltage value of the second power supply signal, when the first power supply circuit 110, the second power supply circuit 120, and the power amplifier circuit 130 are powered normally, the first power supply circuit 110 and the second power supply circuit 120 output the first power supply signal and the second power supply signal with the same voltage or the same voltage range, respectively, or the voltage value of the first power supply signal is greater than the voltage value of the second power supply signal. Therefore, the comparison result of the first power supply signal and the second power supply signal is not the first comparison result at this time. The comparison circuit 150 can output a conduction signal to keep the switch circuit 140 conducting or the switch circuit 140 is turned on by default. When the power amplifier circuit 130 is malfunctioning, such as when it is burned out, a short circuit occurs inside the power amplifier circuit 130, which is equivalent to the first power supply circuit 110 being directly short-circuited to ground. At this time, the first power supply signal will drop to 0V or close to 0, while the second power supply signal remains unchanged. Therefore, the comparison result of the first power supply signal and the second power supply signal is the first comparison result at this time. The comparison circuit 150 outputs a turn-off signal to turn off the switch circuit 140. For example, when the first power supply circuit 110, the second power supply circuit 120, and the power amplifier circuit 130 are normally powered, the first power supply circuit 110 and the second power supply circuit 120 respectively output a first power supply signal and a second power supply signal with the same voltage range. For instance, when the power amplifier circuit 130 is normally powered, both the first power supply signal and the second power supply signal can be high-level signals of 4.5V-5.0V. However, when the power amplifier circuit 130 is malfunctioning, the first power supply signal changes from a high-level signal of 4.5V-5.0V to a low-level signal of 0V or close to 0, thereby causing the comparator circuit 150 to output a turn-off signal.

[0052] Taking the example where the first comparison result is that the current value corresponding to the first power supply signal is greater than the current value of the second power supply signal, when the first power supply circuit 110, the second power supply circuit 120, and the power amplifier circuit 130 are powered normally, the current values ​​corresponding to the first power supply signal and the second power supply signal are the same or the current value corresponding to the second power supply signal is greater than the current value corresponding to the first power supply signal. Therefore, the comparison result of the first power supply signal and the second power supply signal is not the first comparison result. The comparison circuit 150 can output a conduction signal to keep the switch circuit 140 conducting or the switch circuit 140 is turned on by default. When the power amplifier circuit 130 is working abnormally, such as when it is burned out, a short circuit occurs inside the power amplifier circuit 130, which is equivalent to the first power supply circuit 110 being directly short-circuited to ground. At this time, the current value corresponding to the first power supply signal will form an abnormally large current, making the current value corresponding to the first power supply signal greater than the current value of the second power supply signal. As a result, the comparison circuit 150 will output a turn-off signal to turn off the switch circuit 140.

[0053] The radio frequency module 10 provided in this embodiment includes a first power supply circuit 110, a second power supply circuit 120, a power amplifier circuit 130, a switching circuit 140, and a comparator circuit 150. The first power supply circuit 110 provides a first power supply signal; the second power supply circuit 120 provides a second power supply signal; the first terminal of the switching circuit 130 is connected to the first power supply circuit 110; the power supply terminal of the power amplifier circuit 130 is connected to the second terminal of the switching circuit 140; the input terminal of the power amplifier circuit 130 is connected to an RF transceiver; the output terminal of the power amplifier circuit 130 is connected to an antenna; and the power amplifier circuit 130 is used to provide a first power supply signal... Under the action of the circuit, the received radio frequency signal is amplified; the first terminal of the comparator circuit 150 is used to obtain the first power supply signal, the second terminal of the comparator circuit 150 is connected to the second power supply circuit 120, and the output terminal of the comparator circuit 150 is connected to the controlled terminal of the switch circuit 140. When the signal comparison result of the first power supply signal and the second power supply signal is the first comparison result, the comparator circuit 150 outputs a turn-off signal so that the switch circuit 140 disconnects the power supply path. In the scenario where the power amplifier circuit 130 is unlikely to burn out, the power supply path is disconnected in time to avoid the power amplifier circuit 130 from continuously abnormally high current and causing serious overheating.

[0054] In one embodiment, the comparison circuit 150 is further configured to output a turn-on signal at a preset time interval after outputting a turn-off signal to control the switching circuit to turn on the power supply path, and to compare the first power supply signal and the second power supply signal to obtain a comparison result again; and is further configured to output a turn-off signal and stop the comparison if the comparison result is the first comparison result for a consecutive preset number of times.

[0055] To prevent the power amplifier circuit 130 from malfunctioning due to a very low probability of false triggering of the comparator circuit 150—that is, when the power amplifier circuit 130 is in normal working condition and the power supply path is not short-circuited, a very low probability of a false comparison by the comparator circuit 150 itself could lead to a first comparison result and an output shutdown signal, causing the power supply path to disconnect and the power amplifier circuit 130 to malfunction, thus preventing the communication equipment from communicating normally—the comparator circuit 150 is also used to output a conduction signal after a preset time interval after outputting the shutdown signal. This control switch circuit 140 is used to conduct the power supply path and compare the first and second power supply signals to obtain a second comparison result. Furthermore, if the second comparison result is the first comparison result for a preset number of consecutive times, the comparator circuit 150 outputs a shutdown signal and stops the comparison. Since the second comparison result is the first comparison result for a preset number of consecutive times, it indicates that the comparator circuit 150 has not previously experienced a false comparison, and it can be determined that the power amplifier circuit 130 is burnt out; further testing is no longer necessary.

[0056] The preset time can be adjusted according to actual needs. For example, it can be 3 seconds. After the output off signal is output for 3 seconds, the output on signal is output to re-enable the power supply path and obtain the comparison result again. The number of consecutive presets is not limited and can be once or multiple times.

[0057] Optionally, the comparison circuit 150 is further configured to output a conduction signal and stop the comparison if the comparison result is the second comparison result at least once in a consecutive preset number of comparisons; wherein the first comparison result and the second comparison result are different.

[0058] The second comparison result refers to a pre-set judgment condition that is related to the parameter comparison of the first power supply signal and the second power supply signal and can indicate that the power amplifier circuit 130 is currently in normal working condition. When the comparison result of the first power supply signal and the second power supply signal is the second comparison result, it means that the power amplifier circuit 130 is not burned out, the previous protection is determined to be a false comparison, and a conduction signal is output to enable the switching circuit 140 to conduct the power supply path, and the power amplifier circuit 130 resumes normal operation.

[0059] The second comparison result differs from the first comparison result, and the second comparison result can be adjusted based on the actual settings of the first comparison result. Optionally, when the first comparison result indicates that the voltage value of the first power supply signal is less than the voltage value of the second power supply signal, the second comparison result can be that the voltage value of the first power supply signal is equal to the voltage value of the second power supply signal, or that the voltage values ​​of the first power supply signal and the second power supply signal are within the same voltage range.

[0060] Taking the following example, where the first power supply signal and the second power supply signal are both high-level signals of 4.5V-5.0V, and the first comparison result is that the voltage value of the first power supply signal is less than the voltage value of the second power supply signal, and the power amplifier circuit 130 is working normally, the comparison results in the following scenario: when the first power supply signal changes from a high-level signal of 4.5V-5.0V to a low-level signal of 0V or close to 0V, and the second power supply signal remains a high-level signal of 4.5V-5.0V, i.e., the comparison result is that the voltage value of the first power supply signal is less than the voltage value of the second power supply signal, and the power supply path is disconnected, the comparison circuit 150 outputs a conduction signal after a 3-second interval to control the switching circuit 140 to conduct the power supply path, and the comparison is repeated to obtain the comparison result again.

[0061] If the first power supply signal returns to a high level of 4.5V-5.0V, the comparison result is the second comparison result, indicating that the power amplifier circuit 130 is not burned out. The previous protection was determined to be a false comparison, and an output conduction signal is generated to enable the switching circuit 150 to conduct the power supply path, and the power amplifier circuit 130 returns to normal operation. If the first power supply signal returns to a high level of 4.5V-5.0V in one of the three consecutive tests, the previous trigger was determined to be false, and the power amplifier circuit 130 returns to normal operation. If the first power supply signal is low in all three tests, meaning that the comparison result is the first comparison result, the power amplifier circuit 130 is determined to be burned out, and no further comparisons are made.

[0062] Therefore, by comparing the circuit 150 a series of preset times, the correct trigger can be accurately compared, avoiding abnormal triggering from affecting the normal operation of the power amplifier circuit 130.

[0063] In one embodiment, both the first power supply signal and the second power supply signal are voltage signals; the comparison circuit is a voltage comparison circuit, which is used to output a shutdown signal when the voltage value of the first power supply signal is less than the voltage value of the second power supply signal.

[0064] The voltage comparison circuit compares the voltage values ​​of the first power supply signal and the second power supply signal. When the voltage value of the first power supply signal is less than the voltage value of the second power supply signal, it outputs a shutdown signal to disconnect the power supply path of the switching circuit 140. Optionally, when the voltage value of the first power supply signal is greater than or equal to the voltage value of the second power supply signal, it outputs a turn-on signal to turn on the power supply path of the switching circuit 140.

[0065] Optionally, such as Figure 3 As shown, the voltage comparison circuit includes a voltage comparator D1, the first power supply circuit 110 includes a power supply 1, and the second power supply circuit 120 includes a power supply 2 and a voltage divider unit, which includes resistors R1 and R2. The positive voltage terminal V+ of the voltage comparator D1 is connected to the PA VCC voltage of the first power supply signal. The first terminal of resistor R1 is connected to power supply 2, and the second terminal of resistor R1, the first terminal of resistor R2, and the negative voltage terminal V- of voltage comparator D1 are all connected together. Thus, power supply 2 outputs the voltage of the second power supply signal to the negative voltage terminal V- after being divided by resistors R1 and R2.

[0066] Taking a scenario where both power supply 1 and power supply 2 provide VCC as an example, the voltage value of the first power supply signal is VCC, and the voltage value of the second power supply signal is R2 / (R1+R2)VCC. Under normal circumstances, V+ = VCC, V- = R2 / (R1+R2)VCC. At this time, the V+ voltage is higher than V-, the voltage comparator D1 outputs a high-level conduction signal, the normally closed switch SW is closed, the internal power supply path of the power amplifier circuit 130 is normal, and the power amplifier circuit 130 operates normally. When the power amplifier circuit 130 burns out, power supply 1 is short-circuited to ground. At this time, V+ = 0V, V- = R2 / (R1+R2)VCC, the V+ voltage is lower than V-, and the voltage comparator D1 outputs a low-level turn-off signal. The switch circuit 140 is in the open state, the internal power supply of the power amplifier circuit 130 is interrupted, preventing continuous abnormally high current and avoiding severe overheating of the mobile phone.

[0067] In one embodiment, the first power supply signal is a voltage signal and the second power supply signal is a current signal; such as Figure 4 As shown, the comparison circuit 150 includes a sampling unit 151 and a current comparison unit 152. The first terminal of the sampling unit 151 is used to acquire a first power supply signal, and the second terminal of the sampling unit 151 is connected to the first input terminal of the current comparison unit 152. The second terminal of the current comparison unit 152 is connected to a second power supply circuit. The sampling unit 151 is used to convert the first power supply signal into a current signal, and the current comparison unit 152 is used to output a turn-off signal when the current value of the current signal is greater than the current value of the second power supply signal.

[0068] The current comparison unit 152 compares the current value corresponding to the first power supply signal and the current value of the second power supply signal. When the current value corresponding to the first power supply signal is greater than the current value of the second power supply signal, it outputs a shutdown signal to disconnect the power supply path of the switching circuit 140. Optionally, when the current value corresponding to the first power supply signal is less than or equal to the current value of the second power supply signal, it outputs a conduction signal to connect the power supply path of the switching circuit 140.

[0069] Optionally, such as Figure 4 As shown, sampling unit 151 is resistor R3, current comparison unit 152 is current comparator D2, first power supply circuit 110 includes power supply 1, and second power supply circuit 120 includes current source 2.

[0070] The first port of current comparator D2 is connected to current source 2, which can be a standard current source. The second power supply signal provided to current comparator D2 is a reference current Iref, and the reference current Iref output by current source 2 is configurable. The second port of current comparator D2 is connected in series with the power supply path through resistor R3 to obtain the first power supply signal. The input current I_det at the second port of current comparator 2 is determined by the voltage value of the first power supply signal and resistor R3. The current I_det is directly proportional to the voltage value of the first power supply signal and inversely proportional to the resistance value of resistor R3. Once the resistance value of resistor R3 is determined, the voltage value of the first power supply signal can be detected by the magnitude of I_det.

[0071] When power amplifier PA is working normally, the first power supply signal output by power supply 1 is set to a high level. At this time, the current I_det collected by resistor R3 is greater than the current Iref output by current source 2. Current comparator D2 outputs a high-level turn-on signal, switch circuit 140 is closed, the internal power supply path of power amplifier circuit 130 is normal, and power amplifier circuit 130 works normally. When power amplifier circuit 130 burns out, power supply 1 is short-circuited to ground. At this time, V+ = 0V. The current I_det collected by resistor R3 is less than the current Iref output by current source 2. Current comparator D2 outputs a low-level turn-off signal. Switch circuit 140 is open, the internal power supply of power amplifier circuit 130 is interrupted, preventing continuous abnormally high current and avoiding severe overheating of the mobile phone.

[0072] Optionally, in the above embodiments, both voltage comparator D1 and current comparator D2 can integrate independent clock and counting circuits within the device, thereby enabling both voltage comparator D1 and current comparator D2 to have timing and counting functions. Optionally, the parameter settings such as preset time and preset number of times can be configured in advance via software. Therefore, both voltage comparator D1 and current comparator D2 can also be used to output a turn-on signal at preset intervals after outputting a turn-off signal to control the switching circuit to turn on the power supply path, and compare the first power supply signal and the second power supply signal to obtain a second comparison result; they are also used to output a turn-off signal and stop the comparison if the second comparison result is the first comparison result for a consecutive preset number of times; and to output a turn-on signal and stop the comparison if the second comparison result is the second comparison result at least once for a consecutive preset number of times. It is understood that, according to actual needs, in other embodiments, the clock circuit can also be set externally to voltage comparator D1 and current comparator D2 respectively to control the comparison time periods of voltage comparator D1 and current comparator D2, which will not be elaborated here.

[0073] Optionally, such as Figure 5As shown, the power amplifier circuit 130 in the above embodiment may include multiple power amplifiers PA ( Figure 5 Taking two examples, Figure 5 In this circuit, 160 is an RF transceiver, ANT1 and ANT2 are antennas, and PA1 and PA2 are different power amplifiers. Multiple switching circuits 140 and comparator circuits 150 are used. The controlled terminals of the multiple switching circuits 140 are connected one-to-one with the output terminals of the multiple comparator circuits 150. The first terminal of each comparator circuit 150 is used to acquire the first power supply signal on the corresponding power supply path, and the second terminal of each comparator circuit 150 is connected to the second power supply circuit 120. Each power amplifier PA is connected to the first power supply circuit 110 through a corresponding switching circuit 140, and each power amplifier PA is connected to an antenna. Therefore, the on / off state of the power supply path of each power amplifier PA is determined by the corresponding switching circuit 140 and comparator circuit 150. By setting a corresponding switching circuit 140 for the power supply path of each power amplifier PA, when an abnormality occurs in the power supply path of the corresponding power amplifier PA, the comparator circuit 150 controls the switching circuit 140 on the corresponding power supply path to turn off, thus disconnecting the abnormal power supply path.

[0074] It should be noted that when there are multiple power amplifiers (PAs), different power amplifiers (PAs) can be powered by the same or different first power supply circuits 110, and different comparator circuits 150 can be powered by the same or different second power supply circuits 120. The specific settings can be adjusted according to actual needs. When the power amplifier circuit 130 includes multiple power amplifiers (PAs), the power amplifier circuit 130 can be understood as a multi-band multi-mode power amplifier (MMPA) integrating multiple power amplifiers. Multiple power amplifiers (PAs) can form multiple transmission paths, thereby enabling the power amplifier circuit 130 to support multi-channel transmission processing, improving communication quality and user experience.

[0075] Optionally, at least one of the switching circuit 140 and the comparator circuit 150 in the above embodiments can be integrated with the power amplifier circuit 130 to form, for example... Figures 6-8 The integrated circuit shown effectively reduces the area occupied by the RF module 10, improves the integration of the device, facilitates the miniaturization of the device, and reduces costs.

[0076] For example, such as Figure 6 As shown ( Figure 6Taking the switching circuit 140 including a normally closed switch SW, the comparator circuit 150 including a resistor R3 and a current comparator D2, and the power amplifier circuit 130 including a power amplifier PA as an example, where S1 is the controlled terminal of the normally closed switch SW, the power amplifier circuit 130, the switching circuit 140, and the comparator circuit 150 in the above embodiment constitute a first transmitting circuit 101. The first transmitting circuit 101 is configured with a first power supply port VCC1, a second power supply port VCC2, an input port PAIN, and an output port OUT. The first power supply port VCC1 is connected to the first power supply circuit 110, the first terminal of the switching circuit 140, and the first terminal of the comparator circuit 150, respectively. The second power supply port VCC2 is connected to the second power supply circuit 120 and the second terminal of the comparator circuit 150, respectively. The input port PAIN is connected to the input terminal of the power amplifier circuit 130 and the RF transceiver 160, respectively. The output port OUT is connected to the output terminal of the power amplifier circuit 130 and the antenna ANT, respectively.

[0077] For example, such as Figure 7 As shown ( Figure 7 Taking the switching circuit 140 including a normally closed switch SW, the comparator circuit 150 including a resistor R3 and a current comparator D2, and the power amplifier circuit 130 including a power amplifier PA as an example, where S1 is the controlled terminal of the normally closed switch SW, the power amplifier circuit 130 and the comparator circuit 150 in the above embodiment constitute the second transmitting circuit 102. The second transmitting circuit 102 is configured with a third power supply port VCC3, a fourth power supply port VCC4, a control port CT, an input port PA IN, and an output port OUT. The third power supply port VCC3 is connected to the second terminal of the switching circuit 140, the power supply terminal of the power amplifier circuit 130, and the first terminal of the comparator circuit 150, respectively. The fourth power supply port VCC4 is connected to the second terminal of the second power supply circuit 120 and the second terminal of the comparator circuit 150, respectively. The control port CT is connected to the controlled terminal of the switching circuit 140 and the second terminal of the comparator circuit 150, respectively. The input port PA IN is connected to the input terminal of the power amplifier circuit 130 and the RF transceiver 160, respectively. The output port OUT is connected to the output terminal of the power amplifier circuit 130 and the antenna ANT, respectively.

[0078] For example, such as Figure 8 As shown ( Figure 8Taking the switching circuit 140 including a normally closed switch SW, the comparator circuit 150 including a resistor R3 and a current comparator D2, and the power amplifier circuit 130 including a power amplifier PA as an example, where S1 is the controlled terminal of the normally closed switch SW, the power amplifier circuit 130 and the switching circuit 140 in the above embodiment constitute a third transmitting circuit 103. The third transmitting circuit 103 is configured with a fifth power supply port VCC5, a controlled port BCT, an input port PA IN, and an output port OUT. The fifth power supply port VCC5 is connected to the first power supply circuit 110, the first terminal of the switching circuit 140, and the first terminal of the comparator circuit 150, respectively. The controlled port BCT is connected to the output terminal of the comparator circuit 150 and the controlled terminal of the switching circuit 140, respectively. The input port PA IN is connected to the input terminal of the power amplifier circuit 130 and the RF transceiver 160, respectively. The output port OUT is connected to the output terminal of the power amplifier circuit 130 and the antenna ANT, respectively.

[0079] In one embodiment, such as Figure 9 As shown, the radio frequency module 10 may also include a temperature detection circuit 170 and a processing circuit 180.

[0080] Temperature detection circuit 170 is used to detect temperature information of power amplifier circuit 130; processing circuit 180 is connected to the controlled terminal of switch circuit 140 and power amplifier circuit 130 respectively, and is used to acquire temperature information of temperature detection circuit 170 when it is detected that switch circuit 140 remains in the conducting state for a preset time, and control power amplifier circuit 130 to adjust amplification power when the temperature information meets the preset temperature conditions.

[0081] The temperature detection circuit 170 can be configured to detect the temperature information of the power amplifier circuit 130 and output the temperature information to the processing circuit 180. Optionally, the temperature detection circuit 170 can be a temperature sensor, which can be placed close to the power amplifier circuit 130 to acquire the temperature information of the power amplifier circuit 130. When the processing circuit 180 detects that the switching circuit 140 remains in the on state for a preset time, it acquires the temperature information of the temperature detection circuit 170. When the temperature information meets the preset temperature condition, it controls the power amplifier circuit 130 to adjust the amplification power, thereby reducing the power consumption and temperature of the power amplifier circuit 130, and preventing the power amplifier circuit from continuously heating up and eventually burning out.

[0082] The preset temperature condition refers to a pre-set condition related to temperature information that indicates the power amplifier circuit 130 is currently in a critical burnout state. When the temperature information meets the corresponding condition, it indicates that the power amplifier circuit 130 is currently in a critical burnout state, and may potentially burn out if not adjusted. When the power amplifier circuit 130 is in a critical burnout state, its temperature will continue to rise due to increasing heat. At this time, the processing circuit 180 can determine the temperature rise based on the temperature information, and thus determine the current dangerous situation faced by the power amplifier circuit 130, and accordingly control the power amplifier circuit 130 to adjust the output power and improve the heat generation. Optionally, the preset temperature condition can be that the temperature parameter value in the temperature information is greater than or equal to a preset temperature threshold, or that the temperature parameter value in the temperature information is on a continuous upward trend within a preset time period.

[0083] Optionally, the turn-on signal and the turn-off signal have different level states. The processing circuit 180 can determine whether the switch circuit 140 is in the turn-on state by detecting the level state of the controlled terminal of the switch circuit 140. The level state corresponds to the signal state of the output signal of the comparison circuit 150. Taking the turn-off signal level state as high level state and the turn-on signal level state as low level state as an example, when the level state of the controlled terminal of the switch circuit 140 is detected as high level, the switch circuit 140 is determined to be in the turn-off state. When the level state of the controlled terminal of the switch circuit 140 is detected as low level, the switch circuit 140 is determined to be in the turn-on state.

[0084] Optionally, the processing circuit 180 controls the power amplifier circuit 130 to adjust the output power. This can be achieved by connecting the processing circuit 180 to the power supply terminal of the power amplifier circuit 130 via a first power supply circuit 110. The processing circuit 180 outputs a voltage control signal to the first power supply circuit 110, thereby adjusting the supply voltage to the power amplifier circuit 130 according to the voltage control signal without changing the comparison result of the comparison circuit 150. This allows the power amplifier circuit 130 to adjust its output power based on the adjusted supply voltage. Alternatively, the processing circuit 180 can also be an RF transceiver or a baseband processor, directly connected to the controlled terminal of the power amplifier circuit 130. The RF transceiver or baseband processor outputs corresponding control commands to the power amplifier circuit 130 based on temperature information, causing the power amplifier circuit 130 to adjust its output power.

[0085] Therefore, the temperature information of the power amplifier circuit 130 is detected by the temperature detection circuit 170. When the processing circuit 180 detects that the switching circuit 140 remains in the conducting state for a preset time, it makes a prediction of burnout based on the temperature information, and improves the heating situation when the power amplifier circuit 130 is facing a dangerous situation, thereby improving or even eliminating the danger of burnout of the power amplifier circuit 130.

[0086] The division of the circuits in the radio frequency module 10 described above is only for illustrative purposes. In other embodiments, the radio frequency module 10 can be divided into different circuits as needed to complete all or part of the functions of the radio frequency module described above.

[0087] It should be noted that the RF module 10 may also include other auxiliary functional circuits. For example, the RF module 10 may also include a filtering circuit, which is connected to the RF transceiver and the power amplifier circuit 130 respectively, and is used to filter the RF signal output by the RF transceiver before outputting it to the power amplifier circuit 130. The filtering circuit may be integrated into the power amplifier circuit 130, the first transmitting circuit 101, the second transmitting circuit 102, or the third transmitting circuit 103 in the above embodiments, or it may be located externally to the power amplifier circuit 130, the first transmitting circuit 101, the second transmitting circuit 102, or the third transmitting circuit 103.

[0088] like Figure 10 As shown, in one embodiment, this application also provides a method for protecting an RF module, including: steps 1002-1004.

[0089] Step 1002: Obtain the first power supply signal on the power supply path between the first power supply circuit and the power amplifier circuit, and obtain the second power supply signal of the second power supply circuit.

[0090] Step 1004: If the signal comparison result of the first power supply signal and the second power supply signal is the first comparison result, output a shutdown signal to disconnect the power supply path of the switching circuit.

[0091] In this circuit, the first terminal of the switching circuit is connected to the first power supply circuit, the power supply terminal of the power amplifier circuit is connected to the second terminal of the switching circuit, the input terminal of the power amplifier circuit is connected to the RF transceiver, and the output terminal of the power amplifier circuit is connected to the antenna. The power amplifier circuit amplifies the received RF signal under the influence of the first power supply signal. The first power supply circuit, the second power supply circuit, the power amplifier circuit, the switching circuit, and the first comparison result are described in the relevant descriptions in the above embodiments and will not be repeated here. Steps 1002-1004 can be executed by the comparison circuit in the above embodiments; for details, please refer to the relevant descriptions in the above embodiments and will not be repeated here.

[0092] The protection method for the radio frequency module provided in this embodiment obtains a first power supply signal on the power supply path between the first power supply circuit and the power amplifier circuit, and obtains a second power supply signal of the second power supply circuit. When the signal comparison result of the first power supply signal and the second power supply signal is the first comparison result, a shutdown signal is output so that the switching circuit disconnects the power supply path. In the scenario where the power amplifier circuit is unlikely to burn out, the power supply path is disconnected in time to avoid the occurrence of severe overheating caused by continuous abnormal high current in the power amplifier circuit.

[0093] In one embodiment, such as Figure 11 As shown, the protection method for the radio frequency module also includes steps 1102-1104.

[0094] Step 1102: After outputting the off signal, outputting the on signal at a preset time interval to control the switching circuit to conduct the power supply path, and comparing the first power supply signal and the second power supply signal to obtain a comparison result again.

[0095] Step 1104: If the comparison result is the first comparison result for a preset number of consecutive times, output a shutdown signal to control the switching circuit to disconnect the power supply path and stop the comparison.

[0096] Steps 1102-1104 can be executed by the comparison circuit in the above embodiments. For details, please refer to the relevant descriptions in the above embodiments, which will not be repeated here.

[0097] In one embodiment, as shown in Figure 11, the protection method for the radio frequency module further includes step 1106.

[0098] Step 1106: If the comparison result is the second comparison result at least once in a preset number of consecutive comparisons, output a conduction signal and stop the comparison; wherein the first comparison result and the second comparison result are different.

[0099] The second comparison result is described in the relevant description in the above embodiments and will not be repeated here. Step 1106 can be executed by the comparison circuit in the above embodiments, and the specific details can be found in the relevant description in the above embodiments and will not be repeated here.

[0100] In one embodiment, such as Figure 12 As shown, the protection method for the radio frequency module also includes steps 1202 and 1204.

[0101] Step 1202: When it is detected that the switching circuit remains in the conducting state for a preset time, the temperature information of the power amplifier module is acquired.

[0102] Step 1204: When the temperature information meets the preset temperature conditions, control the power amplifier circuit to adjust the amplification power.

[0103] Steps 1202-1204 can be executed by the temperature detection circuit and processing circuit in the above embodiments. For details, please refer to the relevant descriptions in the above embodiments, which will not be repeated here.

[0104] This application also provides a communication device, which may include the radio frequency module in any of the above embodiments. The communication device of this embodiment, including the radio frequency module in any of the above embodiments, can promptly disconnect the power supply path in scenarios where the power amplifier circuit has a low probability of burning out, thereby avoiding severe overheating caused by continuous abnormally high current in the power amplifier circuit.

[0105] This application also provides a communication device, which may include a first power supply circuit, a second power supply circuit, a switching circuit, a power amplifier circuit, a memory, and a processor.

[0106] The first power supply circuit, the second power supply circuit, the switching circuit, and the power amplifier circuit can be found in the relevant descriptions in the above embodiments, and will not be repeated here.

[0107] The system includes a memory and a processor. The memory stores a computer program, and the processor executes the computer program to implement the steps of the protection method for the radio frequency module as described in the above embodiment.

[0108] The communication device of this embodiment includes a first power supply circuit, a second power supply circuit, a switching circuit, a power amplifier circuit, a memory, and a processor. It can disconnect the power supply path in a scenario where the power amplifier circuit is unlikely to burn out, so as to avoid the occurrence of severe overheating caused by continuous abnormal high current in the power amplifier circuit.

[0109] like Figure 13 As shown, further, taking the aforementioned communication device as mobile phone 11 as an example for explanation, specifically, as follows... Figure 13 As shown, the mobile phone 11 may include a memory 21 (which optionally includes one or more computer-readable storage media), a processor 22, a peripheral device interface 23, a radio frequency system 24, and an input / output (I / O) subsystem 26. These components optionally communicate via one or more communication buses or signal lines 29. Those skilled in the art will understand that... Figure 13 The mobile phone 11 shown does not constitute a limitation on the mobile phone and may include more or fewer components than shown, or combine certain components, or have different component arrangements. Figure 13 The various components shown are implemented in hardware, software, or a combination of both, including one or more signal processing and / or application-specific integrated circuits.

[0110] Memory 21 optionally includes high-speed random access memory, and also optionally includes non-volatile memory, such as one or more disk storage devices, flash memory devices, or other non-volatile solid-state memory devices. Exemplary examples include software components stored in memory 21 such as an operating system 211, communication circuitry (or instruction set) 212, global positioning system (GPS) circuitry (or instruction set) 213, etc.

[0111] Processor 22 and other control circuits (such as the control circuits in the radio frequency system 24) can be used to control the operation of mobile phone 11. The processor 22 may be based on one or more microprocessors, microcontrollers, digital signal processors, baseband processors, power management units, audio codec chips, application-specific integrated circuits, etc.

[0112] The processor 22 can be configured to implement control algorithms for controlling the use of the antenna in the mobile phone 11. The processor 22 can also issue control commands for controlling various switches in the radio frequency system 24.

[0113] I / O subsystem 26 couples input / output peripherals on mobile phone 11, such as a keypad and other input control devices, to peripheral interface 23. I / O subsystem 26 optionally includes a touchscreen, buttons, a tone generator, an accelerometer (motion sensor), an ambient light sensor and other sensors, LEDs and other status indicators, data ports, etc. For example, a user can control the operation of mobile phone 11 by supplying commands via I / O subsystem 26, and can use the output resources of I / O subsystem 26 to receive status information and other outputs from mobile phone 11. For example, a user can press button 261 to turn the phone on or off.

[0114] The radio frequency system 24 may include the radio frequency module 10 in any of the foregoing embodiments.

[0115] This application also provides a computer-readable storage medium. One or more non-volatile computer-readable storage media containing computer-executable instructions, which, when executed by one or more processors, cause the processors to perform the steps of a protection method for an RF module.

[0116] This application also provides a computer program product containing instructions that, when run on a computer, cause the computer to execute a method for protecting a radio frequency module.

[0117] Any references to memory, storage, databases, or other media used in this application may include non-volatile and / or volatile memory. Suitable non-volatile memory may include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM), or flash memory. Volatile memory may include random access memory (RM), which is used as external cache memory. By way of illustration and not limitation, RM is available in a variety of forms, such as static RM (SRM), dynamic RM (DRM), synchronous DRM (SDRM), dual data rate SDRM (DDR SDRM), enhanced SDRM (ESDRM), synchronous link DRM (SLDRM), ROMbus direct RM (RDRM), direct memory bus dynamic RM (DRDRM), and memory bus dynamic RM (RDRM).

[0118] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0119] The above embodiments merely illustrate several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A radio frequency module, characterized in that, include: A first power supply circuit is used to provide a first power supply signal; The second power supply circuit is used to provide the second power supply signal; A switching circuit, wherein the first terminal of the switching circuit is connected to the first power supply circuit; A power amplifier circuit, wherein the power supply terminal of the power amplifier circuit is connected to the second terminal of the switching circuit, the input terminal of the power amplifier circuit is used to connect to the radio frequency transceiver, the output terminal of the power amplifier circuit is used to connect to the antenna, and the power amplifier circuit is used to amplify the power of the received radio frequency signal under the action of the first power supply signal. A comparator circuit is provided, wherein a first terminal of the comparator circuit is used to acquire the first power supply signal on the power supply path between the first power supply circuit and the power amplifier circuit, a second terminal of the comparator circuit is connected to the second power supply circuit, and an output terminal of the comparator circuit is connected to the controlled terminal of the switching circuit. The comparator circuit is used to output a shutdown signal when the signal comparison result between the first power supply signal and the second power supply signal is a first comparison result, and the first comparison result indicates that the power amplifier circuit is in a burnt-out state and the first power supply circuit is short-circuited to ground, so that the switching circuit disconnects the power supply path. The comparison circuit is also used to output a turn-on signal after the turn-off signal is output, at a preset time interval to control the switching circuit to turn on the power supply path, and to compare the first power supply signal and the second power supply signal to obtain a comparison result again; It is also used to output the shutdown signal and stop the comparison when the comparison result is the first comparison result for a consecutive preset number of times.

2. The radio frequency module according to claim 1, characterized in that, The comparison circuit is further configured to output the activation signal and stop the comparison if the comparison result is the second comparison result at least once in a consecutive preset number of times; The first comparison result is different from the second comparison result.

3. The radio frequency module according to claim 1, characterized in that, Both the first power supply signal and the second power supply signal are voltage signals; The comparison circuit is a voltage comparison circuit, which is used to output the shutdown signal when the voltage value of the first power supply signal is less than the voltage value of the second power supply signal.

4. The radio frequency module according to claim 1, characterized in that, The first power supply signal is a voltage signal and the second power supply signal is a current signal; The comparison circuit includes a sampling unit and a current comparison unit. The first terminal of the sampling unit is used to acquire the first power supply signal, the second terminal of the sampling unit is connected to the first input terminal of the current comparison unit, and the second terminal of the current comparison unit is connected to the second power supply circuit. The sampling unit is used to convert the first power supply signal into a current signal, and the current comparison unit is used to output the shutdown signal when the current value of the current signal is greater than the current value of the second power supply signal.

5. The radio frequency module according to claim 1, characterized in that, The radio frequency module also includes: A temperature detection circuit is used to detect the temperature information of the power amplifier circuit; The processing circuit is connected to the controlled terminal of the switching circuit and the power amplifier circuit, respectively. When the switching circuit is detected to remain in the conducting state for a preset time, the processing circuit acquires the temperature information of the temperature detection circuit. When the temperature information meets the preset temperature conditions, the processing circuit controls the power amplifier circuit to adjust the amplification power.

6. The radio frequency module according to any one of claims 1-5, characterized in that, The power amplifier circuit, the switching circuit, and the comparator circuit constitute a first transmitting circuit, which is configured with a first power port, a second power port, an input port, and an output port. The first power port is connected to the first power circuit, the first terminal of the switching circuit, and the first terminal of the comparator circuit, respectively. The second power port is connected to the second power circuit and the second terminal of the comparator circuit, respectively. The input port is connected to the input terminal of the power amplifier circuit and the radio frequency transceiver, respectively. The output port is connected to the output terminal of the power amplifier circuit and the antenna, respectively.

7. The radio frequency module according to any one of claims 1-5, characterized in that, The power amplifier circuit and the comparator circuit constitute a second transmitting circuit, which is configured with a third power port, a fourth power port, a control port, an input port and an output port. The third power port is connected to the second terminal of the switching circuit, the power supply terminal of the power amplifier circuit, and the first terminal of the comparator circuit, respectively. The fourth power port is connected to the second power supply circuit and the second terminal of the comparator circuit, respectively. The control port is connected to the controlled terminal of the switching circuit and the output terminal of the comparator circuit, respectively. The input port is connected to the input terminal of the power amplifier circuit and the radio frequency transceiver, respectively. The output port is connected to the output terminal of the power amplifier circuit and the antenna, respectively.

8. The radio frequency module according to any one of claims 1-5, characterized in that, The power amplifier circuit and the switching circuit constitute a third transmitting circuit, which is configured with a fifth power supply port, a controlled port, an input port and an output port. The fifth power port is connected to the first power circuit, the first terminal of the switching circuit, and the first terminal of the comparator circuit. The controlled port is connected to the output terminal of the comparator circuit and the controlled terminal of the switching circuit. The input port is connected to the input terminal of the power amplifier circuit and the radio frequency transceiver. The output port is connected to the output terminal of the power amplifier circuit and the antenna.

9. A method for protecting an RF module, characterized in that, include: Acquire the first power supply signal on the power supply path between the first power supply circuit and the power amplifier circuit, and acquire the second power supply signal of the second power supply circuit; When the signal comparison result between the first power supply signal and the second power supply signal is the first comparison result, the first comparison result is used to indicate that the power amplifier circuit is in a burnt-out state. When the first power supply circuit is short-circuited to ground, a shutdown signal is output so that the switching circuit disconnects the power supply path. After outputting the shutdown signal, an on signal is output at a preset time interval to control the switching circuit to turn on the power supply path, and the first power supply signal and the second power supply signal are compared to obtain a comparison result again; If the comparison result is the first comparison result for a consecutive preset number of times, the shutdown signal is output and the comparison is stopped; Wherein, the first terminal of the switching circuit is connected to the first power supply circuit, the power supply terminal of the power amplifier circuit is connected to the second terminal of the switching circuit, the input terminal of the power amplifier circuit is used to connect to the radio frequency transceiver, the output terminal of the power amplifier circuit is used to connect to the antenna, and the power amplifier circuit is used to amplify the power of the received radio frequency signal under the action of the first power supply signal.

10. A communication device, characterized in that, include: The radio frequency module as described in any one of claims 1-8.

11. A communication device, characterized in that, include: A first power supply circuit is used to provide a first power supply signal; The second power supply circuit is used to provide the second power supply signal; A switching circuit, wherein the first terminal of the switching circuit is connected to the first power supply circuit; A power amplifier circuit, wherein the power supply terminal of the power amplifier circuit is connected to the second terminal of the switching circuit, the input terminal of the power amplifier circuit is used to connect to the radio frequency transceiver, the output terminal of the power amplifier circuit is used to connect to the antenna, and the power amplifier circuit is used to amplify the power of the received radio frequency signal under the action of the first power supply signal. A memory and a processor, the memory storing a computer program, the processor executing the computer program to implement the steps of the protection method as described in claim 9.

12. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, it implements the steps of the protection method as described in claim 9.

Images