CN117240319A

CN117240319A - Radio frequency module, protection method thereof, communication equipment and readable storage medium

Info

Publication number: CN117240319A
Application number: CN202210633593.XA
Authority: CN
Inventors: 岳仲博
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2022-06-07
Filing date: 2022-06-07
Publication date: 2023-12-15

Abstract

The application relates to a radio frequency module, a protection method thereof, communication equipment and a readable storage medium, wherein the radio frequency module comprises a power amplifying circuit, a power circuit, a protection circuit and a processing circuit, and the power amplifying circuit is used for amplifying the power of a radio frequency signal under the action of the power circuit; the processing circuit determines a target working mode according to the target amplified power; the protection circuit obtains a power supply signal of a power supply channel between the power supply circuit and the power end of the power amplification circuit, compares the power supply signal with a reference signal of a corresponding mode in a target working mode, and cuts off the power supply channel when a comparison result meets a preset cut-off condition of the target working mode. The target operation mode comprises one of a voltage comparison mode with higher response speed and a current comparison mode with higher accuracy, wherein the voltage comparison mode is more suitable for a radio frequency scene with high amplification power, and the current comparison mode is more suitable for a radio frequency scene with low amplification power. Therefore, the occurrence of continuous abnormal large current of the power amplifying circuit with small probability can be avoided in different radio frequency scenes.

Description

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

Technical Field

The present application relates to the field of antenna technologies, and in particular, to a radio frequency module, a protection method thereof, a communication device, and a readable storage medium.

Background

In related rf technology, a power amplifier is used to amplify a weak small signal generated by a rf transceiver into a high-power strong signal, and radiate the signal into free space through an antenna to communicate with a base station.

However, since the power amplifier in the rf transmission path is a high-power device, the power amplifier is often operated under high-temperature, high-power and high-current operation scenes, so that the problem of low probability of burnout is easy to occur. When the power amplifier burns out, the continuous abnormal high current can cause severe heating of the communication equipment, and the surface temperature rises, so that the use of a user is influenced.

Disclosure of Invention

The embodiment of the application provides a radio frequency module, a radio frequency protection method, communication equipment and a readable storage medium, which can avoid continuous abnormal large current and improve the serious heating problem of the communication equipment in an abnormal production scene.

The first aspect of the present application provides a radio frequency module, comprising:

the power amplification circuit is configured with an input end, an output end and a power supply end, wherein the input end is used for receiving radio frequency signals, the output end is used for outputting radio frequency signals subjected to power amplification, the power supply end is used for receiving power supply signals, and the power amplification circuit is used for carrying out power amplification on the received radio frequency signals;

A power supply circuit;

the first end of the protection circuit is connected with the power supply circuit, the second end of the protection circuit is connected with the power supply end of the power amplification circuit, and the protection circuit is used for outputting a power supply signal of the power supply circuit to the power supply end of the power amplification circuit when a power supply passage between the power supply circuit and the power amplification circuit is conducted;

the processing circuit is connected with the controlled end of the protection circuit and is used for acquiring target amplified power of the power amplifying circuit and controlling the protection circuit to work in a target working mode according to the target amplified power, wherein the target working mode comprises one of a voltage comparison mode and a current comparison mode;

the protection circuit is used for acquiring the power supply signal of the power supply channel, and disconnecting the power supply channel if a comparison result of the power supply signal and a reference signal corresponding to the target working mode meets a preset turn-off condition of the target working mode.

The second aspect of the present application provides a method for protecting a radio frequency module, including:

acquiring target amplification power of a power amplification circuit for amplifying power of a received radio frequency signal in a current radio frequency scene;

Selecting a target working mode according to the target amplified power, wherein the target working mode comprises one of a voltage comparison mode and a current comparison mode;

and acquiring the power supply signal of a power supply channel between a power supply circuit and the power amplification circuit, and disconnecting the power supply channel if the comparison result of the power supply signal and a reference signal corresponding to the target working mode meets the preset turn-off condition of the target working mode.

A third aspect of the present application provides a communication device comprising:

the radio frequency module is as described above.

A fourth aspect of the present application provides a communication device comprising:

the power amplifying circuit is used for amplifying the power of the received radio frequency signal;

the power supply circuit is used for providing a power supply signal for a power supply end of the power amplifying circuit;

a memory storing a computer program and a processor implementing the steps of the protection method as described above when the processor executes the computer program.

A fifth aspect of the application provides a computer readable storage medium having stored thereon a computer program, characterized in that the computer program when executed by a processor implements the steps of the protection method as described above.

The radio frequency module, the protection method thereof, the communication equipment and the readable storage medium, wherein the radio frequency module comprises: the power amplification circuit is configured with an input end, an output end and a power supply end, the input end is used for receiving the radio frequency signal, the output end is used for outputting the radio frequency signal subjected to power amplification, the power supply end is used for receiving the power supply signal, and the power amplification circuit is used for carrying out power amplification on the received radio frequency signal; the first end of the protection circuit is connected with the power supply circuit, the second end of the protection circuit is connected with the power supply end of the power amplification circuit, and the protection circuit is used for outputting a power supply signal of the power supply circuit to the power supply end of the power amplification circuit when a power supply passage between the power supply circuit and the power amplification circuit is conducted; the processing circuit is used for acquiring target amplified power of the power amplifying circuit in the current radio frequency scene, and controlling a target working mode of the protection circuit according to the target amplified power, wherein the target working mode comprises one of a voltage comparison mode and a current comparison mode; the protection circuit is also used for acquiring a power supply signal of the power supply channel, comparing the power supply signal with a reference signal of a corresponding mode in a target working mode, and disconnecting the power supply channel when a comparison result meets a preset turn-off condition of the target working mode. The voltage comparison mode has a faster response speed, and can efficiently and quickly obtain a comparison result so as to be more suitable for a radio frequency scene with larger amplified power; the current comparison mode has higher sensitivity and accuracy so as to be more suitable for radio frequency scenes with smaller amplified power or the amplified power switching; therefore, the radio frequency module can be matched with different radio frequency scene requirements to carry out protection in different comparison modes, so that severe heating caused by continuous abnormal large current of the power amplification circuit is avoided under the scene of small probability burning.

Drawings

In order to more clearly illustrate the embodiments of the application or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of an RF module according to an embodiment;

FIG. 2 is a second schematic diagram of an RF module according to an embodiment;

FIG. 3 is a third schematic diagram of an RF module according to an embodiment;

FIG. 4 is a schematic diagram of a RF module in one embodiment;

FIG. 5 is a schematic diagram of a RF module in one embodiment;

FIG. 6 is a schematic diagram of a RF module in one embodiment;

FIG. 7 is a flowchart of a method for protecting an RF module according to one embodiment;

FIG. 8 is a second flowchart of a method for protecting an RF module according to an embodiment;

fig. 9 is a schematic structural diagram of a communication device in an embodiment.

Detailed Description

The present application will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present application more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the application.

It will be understood that the terms first, second, etc. as 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 element and should not be construed as indicating or implying a relative importance or number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present application, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

It will be understood that when an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.

The radio frequency module according to the embodiment of the present application may be applied to a communication device having a wireless communication function, where the communication device may be a handheld device, a vehicle-mounted device, a wearable device, a computing device, or other processing devices connected to a wireless modem, and various types of User Equipment (UE), such as a Mobile phone, a Mobile Station (MS), and so on. For convenience of description, the above-mentioned devices are collectively referred to as communication devices.

As shown in fig. 1, in one embodiment, a radio frequency module 10 according to the present application includes a power circuit 110, a power amplifying circuit 120, a protection circuit 130, and a processing circuit 140.

The power amplifying circuit 120 is configured with an input end, an output end and a power supply end, the input end is used for receiving the radio frequency signal, the output end is used for outputting the radio frequency signal subjected to power amplification, the power supply end is used for receiving the power supply signal, and the power amplifying circuit is used for performing power amplification on the received radio frequency signal; a power supply circuit 110; the protection circuit 130, the first end of the protection circuit 130 is connected with the power circuit 110, the second end of the protection circuit 130 is connected with the power end of the power amplifying circuit 120, and the protection circuit 130 is used for outputting the power supply signal of the power circuit 110 to the power end of the power amplifying circuit 120 when the power supply path between the power circuit 110 and the power amplifying circuit 120 is conducted; the processing circuit 140 is connected with the controlled end of the protection circuit 130, and is used for acquiring the target amplified power of the power amplifying circuit 120, controlling the protection circuit 130 to work in a target working mode according to the target amplified power, wherein the target working mode comprises one of a voltage comparison mode and a current comparison mode; the protection circuit 130 is further configured to obtain a power supply signal of the power supply path, and disconnect the power supply path if a comparison result of the power supply signal and a reference signal corresponding to the target working mode meets a preset shutdown condition of the target working mode.

The power supply circuit 110 is configured to provide a power supply signal to the power amplifying circuit 120 and the protection circuit 130, where the power supply signal is provided to the power amplifying circuit 120 to enable the power amplifying circuit 120 to work normally, so as to amplify the received radio frequency signal; a signal is provided to the protection circuit 130 to cause the protection circuit to compare the supply signal with a reference signal. The Power circuit 110 may include, for example, a battery and a Power Management IC (PMIC) connected to the battery to supply electric Power of the battery to the Power amplifying circuit 120.

The power supply end of the power amplifying circuit 120 is connected to the power supply circuit 110 through the protection circuit 130, the input end of the power amplifying circuit 120 is used for being connected to the radio frequency transceiver to receive the radio frequency signal, and the output end of the power amplifying circuit 120 is used for being connected to the antenna to output the radio frequency signal amplified by power to the antenna. The power amplifying circuit 120 is configured to amplify the power of the signal output by the radio frequency transceiver under the action of the power supply signal of the power supply circuit 110, and output the amplified signal to the antenna, so as to transmit the amplified signal outwards through the antenna. The antenna may support the reception and transmission of radio frequency signals in different frequency bands, and may be formed using any suitable type of antenna, and in the embodiment of the present application, the type of antenna is not limited. The Power amplifying circuit 120 includes a Power Amplifier (PA), or includes a Power amplifier and other functional devices, and it should be noted that, when the Power amplifying circuit 120 includes a Power amplifier and other devices, the Power supply path between the Power circuit 110 and the Power amplifying circuit 120 is still understood to be the Power supply path between the Power circuit 110 and the Power amplifier.

The first end of the protection circuit 130 is connected to the power circuit 110, and the second end of the protection circuit 130 is connected to the power end of the power amplifying circuit 120, so as to output a power supply signal of the power circuit 110 to the power end of the power amplifying circuit 120 when a power supply path between the power circuit 110 and the power amplifying circuit 120 is turned on; the controlled end of the protection circuit 130 is connected to the processing circuit 140 to operate in the target working mode under the control of the processing circuit 140, and the protection circuit 130 is configured to obtain a power supply signal of the power supply path, and disconnect the power supply path if a comparison result of the power supply signal and a reference signal corresponding to the target working mode meets a preset shutdown condition of the target working mode.

The preset turn-off condition refers to a preset condition which is related to the preset parameter comparison of the reference signal corresponding to the power supply signal and the target working mode and can indicate that the power amplifying circuit 120 is in the burning state at present, and when the comparison result of the power supply signal and the reference signal meets the preset turn-off condition of the target working mode, the power amplifying circuit 120 is indicated to be in the burning state at present. Because the power amplifier in the power amplifying circuit 120 belongs to a high-power device, the power amplifier is often under the working scene of high temperature, high power and high current, the event of burning out with small probability can occur, when the power amplifier is burnt out, the short circuit can occur inside, the power supply signal is abnormal, the abnormal high current can be generated on the power supply path, and the serious heating condition occurs. When the comparison result of the power supply signal and the reference signal by the protection circuit 130 meets the preset turn-off condition of the target working mode, the protection circuit 130 turns off the power supply path, so that the occurrence of serious heating caused by the fact that the power amplifying circuit 120 continuously generates large current and abnormal large current can be avoided.

The processing circuit 140 is configured to obtain a target amplified power of the power amplifying circuit 120, and control the protection circuit 130 to operate in a target operation mode according to the target amplified power, where the target operation mode includes one of a voltage comparison mode and a current comparison mode.

The target working mode is a working mode of the protection circuit 130 when detecting and comparing the power supply signal, and comprises one of a voltage comparison mode and a current comparison mode, wherein the voltage comparison mode has a faster response speed, and can be used for obtaining a comparison result efficiently and rapidly so as to be more suitable for a radio frequency scene with larger amplified power; the current comparison mode has higher sensitivity and accuracy so as to be more suitable for radio frequency scenes with smaller amplified power or the amplified power switching; therefore, the radio frequency module can be matched with different radio frequency scene requirements to carry out protection in different comparison modes, so that severe heating caused by continuous abnormal large current of the power amplification circuit is avoided under the scene of small probability burning.

The power amplifying circuit 120 has different target amplifying powers corresponding to different radio frequency scenarios, and the possible low probability of burning out of the different target amplifying powers may be different. The inventors creatively found that: in a radio frequency scene with larger amplified power, because the power is larger, the probability of a small burning event is higher than that of other radio frequency scenes with smaller amplified power, and the speed of short circuit inside the power amplifier after burning is higher, if the power amplifier is not protected quickly and timely, the damage to other devices inside the equipment is larger, therefore, if the power amplifier can detect in a voltage comparison mode in the scene, the protection is quick and timely, and the serious heating is avoided; in some radio frequency scenes with small amplified power or switching of amplified power, the fluctuation of the small power is difficult to detect when the power is small and abnormal, or the fluctuation of the abnormal power is difficult to detect when the scene is in switching because the scene is in power switching requirement, so that the working condition of the power amplifier can be rapidly detected, the precision is possibly reduced, and the erroneous judgment is caused, therefore, if the detection can be performed in a current comparison mode in the scene, the precision can be improved, and the erroneous judgment is avoided.

Alternatively, the processing circuit 140 may protect a radio frequency transceiver, a baseband processor, etc., so that the processing circuit 140 may obtain the target amplified power of the power amplifying circuit 120. Alternatively, the processing circuit 140 may determine the target operation mode according to the magnitude or level of the target amplified power, for example, control to a voltage comparison mode when the target amplified power satisfies the first power condition, and control to a current comparison mode when the target amplified power satisfies the second power condition; the first power condition and the second power condition are different. The first power condition may be, for example, that the target amplified power is greater than a preset threshold or that the target amplified power is constant for a preset period of time, and the second power condition may be that the target amplified power is less than the preset threshold or that the target amplified power is switched in value for the preset period of time.

Taking the rf transceiver as an example, in the rf scenario, the rf transceiver may output an rf signal to the power amplifying circuit 120, while outputting the rf signal, the rf transceiver may determine a target amplified power according to a type of the rf signal, for example, the rf signal of 4G corresponds to a first target amplified power, the rf signal of 5G corresponds to a second target amplified power, and the second target amplified power is greater than a preset threshold, and the first target amplified power is less than the preset threshold, so that the rf transceiver may control the protection circuit 130 to operate in a voltage comparison mode in the rf scenario of 5G, operate in a current comparison mode in the rf scenario of 4G, and may also operate in a current comparison mode in the rf scenario of switching the rf signal of 5G to the rf signal of 4G. It should be noted that, the present embodiment is not limited to the aforementioned radio frequency scenario, and may be specifically set according to the actual situation of the target amplified power; the processing circuit 140 may also obtain the target amplified power according to receiving an indication signal capable of indicating the current rf scene type, where the current rf scene type and the target amplified power have a mapping relationship, or may also obtain the target amplified power through other manners, which is not limited herein.

The radio frequency module provided in this embodiment includes a power amplifying circuit 120, a power supply circuit 110, a protection circuit 130 and a processing circuit 140, where the power amplifying circuit 120 is configured with an input end, an output end and a power supply end, the input end is used for receiving radio frequency signals, the output end is used for outputting radio frequency signals amplified by power, the power supply end is used for receiving power supply signals, and the power amplifying circuit 120 is used for amplifying the received radio frequency signals by power; the first end of the protection circuit 130 is connected with the power supply circuit 110, the second end of the protection circuit 130 is connected with the power supply end of the power amplification circuit 120, and the protection circuit 130 is used for outputting a power supply signal of the power supply circuit 110 to the power supply end of the power amplification circuit 120 when a power supply path between the power supply circuit 110 and the power amplification circuit 120 is conducted; the processing circuit 140 is configured to obtain a target amplified power of the power amplifying circuit 120 in the current radio frequency scenario, and control a target operation mode of the protection circuit 130 according to the target amplified power, where the target operation mode includes one of a voltage comparison mode and a current comparison mode; the protection circuit 130 is further configured to obtain a power supply signal of the power supply path, compare the power supply signal with a reference signal of a corresponding mode in the target operation mode, and disconnect the power supply path when the comparison result meets a preset shutdown condition of the target operation mode. The voltage comparison mode has a faster response speed, and can efficiently and quickly obtain a comparison result so as to be more suitable for a radio frequency scene with larger amplified power; the current comparison mode has higher sensitivity and accuracy so as to be more suitable for radio frequency scenes with smaller amplified power or the amplified power switching; therefore, the radio frequency module can be matched with different radio frequency scene requirements to carry out protection in different comparison modes, so that severe heating caused by continuous abnormal large current of the power amplification circuit is avoided under the scene of small probability burning.

In one embodiment, the protection circuit 130 is configured to control the power supply path to switch from the off state to the on state in the target working mode at an interval of a preset time after the power supply path is disconnected, and compare the power supply signal with a reference signal corresponding to the target working mode to obtain a re-comparison result; and the control unit is also used for controlling the power supply passage to be turned off and stopping comparison when the comparison result again meets the preset turn-off condition in the continuous preset times.

In order to further prevent the problem that the power amplifying circuit 120 cannot normally operate due to the false triggering of the minimum probability of the protection circuit 130, that is, when the power amplifying circuit 120 is in a normal operating state and the power supply path is not shorted, due to the problem of the protection circuit 130, in the target operating mode, the false comparison of the minimum probability obtains that the comparison result meets the preset turn-off condition and outputs the turn-off signal to cause the power supply path to be disconnected, so that the power amplifying circuit 120 cannot normally operate and the communication equipment cannot normally communicate, the protection circuit 130 is further used for controlling the power supply path to switch from the turn-off state to the turn-on state at intervals of preset time after outputting the turn-off signal, and comparing the power supply signal with the reference signal corresponding to the target operating mode to obtain a re-comparison result; and the device is also used for outputting a turn-off signal and stopping comparison when the re-comparison results meet the preset turn-off condition in the continuous preset times. Since the re-comparison results are the first comparison results in the continuous preset times, which indicates that the protection circuit 130 has not previously performed the erroneous comparison, it can be determined that the power amplifying circuit 120 is burned out and is not detected later.

The preset time can be adjusted and set according to actual needs, for example, the preset time can be 3s, and after the power supply channel is turned off for 3s, the power supply channel is controlled to be turned on again so as to obtain a comparison result again. The number of continuous presets is not particularly limited, and may be 1 or more.

In one embodiment, the protection circuit 130 is further configured to control the power supply path to be turned on and stop detection when the comparison result at least once satisfies a preset conduction condition corresponding to the target operating mode in the continuous preset times; wherein the preset on condition and the preset off condition are different.

The preset conduction condition refers to a preset condition that is preset and related to parameter comparison of reference signals corresponding to a power supply signal and a target working mode and can indicate that the power amplification circuit 120 is in a normal working state at present, when a comparison result of the power supply signal and the reference signals meets the preset conduction condition, the power amplification circuit 120 is indicated to be not burnt, the last protection is judged to be a false comparison, the conduction of a power supply channel is controlled, and the power amplification circuit 120 resumes normal working.

The preset conduction condition and the preset turn-off condition are different, and the preset conduction condition can be adjusted and set according to the actual setting condition of the first comparison result. Optionally, taking the target working mode as the voltage comparison mode as an example, the preset turn-off condition of the voltage comparison mode may be that the voltage value of the power supply signal is smaller than the reference voltage value, and the preset turn-on condition may be that the voltage value of the power supply signal is greater than or equal to the reference voltage value. Further, taking the power amplifier circuit 120 operating normally with the power supply signal voltage value and the reference voltage value of 4.5V-5.0V as an example with 3 times of continuous preset times, when the power supply signal voltage value obtained by comparison is changed from a high level signal of 4.5V-5.0V to 0V or is close to 0, the reference voltage value is kept at 4.5V-5.0V, i.e. the comparison result is that the voltage value of the power supply signal is smaller than the reference voltage value, the protection circuit 130 controls the power supply path to be turned on after the power supply path is disconnected for 3s, and the comparison is performed again to obtain the comparison result again.

At this time, if the voltage value of the power supply signal is recovered to 4.5V-5.0V, the comparison result again satisfies that the voltage value of the power supply signal is greater than or equal to the reference voltage value, which means that the power amplifying circuit 120 is not burnt out, and the last protection is judged to be a false comparison, the power supply path is controlled to be conducted, and the power amplifying circuit 120 resumes normal operation; continuously detecting for 3 times, if the voltage value of the power supply signal in one time is recovered to be 4.5V-5.0V of high level, determining that the last time is false triggering, and recovering the power amplification circuit 120 to work normally; if the connection is detected 3 times, the supply signal voltage values are all 0V or close to 0, and the power amplification circuit 120 is judged to be burnt out, and the comparison is not performed later.

Thus, by comparing the protection circuit 130 continuously for a predetermined number of times, the correct trigger can be accurately compared, and the normal use of the power amplifying circuit 120 is prevented from being affected by the abnormal trigger.

In one embodiment, as shown in fig. 2, the protection circuit 130 includes: a reference voltage source 131, a reference current source 132, a switching module 133, a voltage comparison module 134, and a current comparison module 135.

A reference voltage source 131 and a reference current source 132; the first end of the switch module 133 is connected with the power circuit 110, the second end of the switch module 133 is connected with the power end of the power amplifying circuit 120, and the switch module 133 is used for turning off the power supply path when receiving the turn-off signal; the voltage comparison module 134, the first end of the voltage comparison module 134 is used for inputting the power supply signal, the second end of the voltage comparison module 134 is connected with the output end of the reference voltage source 131, the output end of the voltage comparison module 134 is connected with the controlled end of the switch module 133, the voltage comparison module 134 is used for turning on the voltage comparison mode when the reference voltage is input, so as to output the turn-off signal when the comparison result of the voltage value of the power supply signal and the reference voltage meets the preset turn-off condition; the current comparison module 135, wherein a first end of the current comparison module 135 is used for inputting a power supply signal, a second end of the current comparison module 135 is connected with an output end of the reference current source 132, an output end of the current comparison module 135 is connected with a controlled end of the switch module 133, the current comparison module 135 is used for starting a current comparison mode when a reference voltage is input so as to obtain a current value of the power supply signal, and outputting a turn-off signal when the current value is compared to be larger than the reference current; the processing circuit 140 is respectively connected to the controlled end of the reference voltage source 131 and the controlled end of the reference current source 132, and is used for controlling the reference voltage source 131 to output a reference voltage when the target amplified power meets the first power condition, and controlling the reference current source 132 to output a reference current when the target amplified power meets the second power condition; the first power condition and the second power condition are different.

Wherein the reference signal comprises one of a reference voltage and a reference current, the reference voltage source 131 is configured to provide the reference voltage to the voltage comparison module 134, and the reference current source 132 is configured to provide the reference current to the current comparison module 135.

Alternatively, the reference voltage source 131 may be a battery and a Power Management IC (PMIC) connected to the battery to convert the electric energy of the battery into a voltage and output to the voltage comparison module 134 under the control of the processing circuit 140. In practical applications, the power supply circuit 110 and the reference voltage source 131 may be the same power supply circuit or two different power supply circuits. The processing circuit is respectively connected with the controlled end of the reference voltage source 131 and the controlled end of the reference current source 132, and is used for controlling the reference voltage source 131 to output reference voltage when the target amplified power meets the first power condition and controlling the reference current source 132 to output reference current when the target amplified power meets the second power condition; the first power condition and the second power condition are different. Optionally, the first power condition includes the target amplified power being greater than a preset threshold; the second power condition includes that the target amplified power is smaller than a preset threshold; or the first power condition includes that the target amplified power is continuously unchanged in a preset time period; the second power condition includes that the target amplified power is switched at least twice by different values in a preset time period.

The first end of the switch module 133 is connected to the power circuit 110, the second end of the switch module 133 is connected to the power end of the power amplifying circuit 120, and the controlled ends of the switch module 133 are respectively connected to the output ends of the voltage comparing module 134 and the current comparing module 135. The controlled ends of the switch module 133 are respectively connected with the voltage comparison module 134 and the current comparison module 135, which can be understood that the number of the controlled ends of the switch module 133 is one, and the controlled ends are simultaneously connected with the voltage comparison module 134 and the current comparison module 135; it may also be understood that the number of the controlled ends of the switch module 133 is two, and the two controlled ends are respectively connected with the output ends of the voltage comparison module 134 and the output ends of the current comparison module 135 in a one-to-one correspondence manner. Optionally, the default state of the switch module 133 is an on state, and when the switch module 133 is in the default state, the power supply path is turned on, so that the power supply circuit 110 provides the power supply signals to the power amplifying circuit 120 and the protection circuit 130. Optionally, the switching module 133 includes at least one switching device, which may be, for example, a normally closed switch or a switching tube, and may include other devices having a switching function, which is not further limited herein.

Taking the switching module 133 as an example, the switching device is a normally closed switch, a normally closed movable contact of the normally closed switch is connected with the power circuit 110, a normally closed stationary contact of the normally closed switch is connected with the power amplifying circuit 120, and controlled contacts of the normally closed switch are respectively connected with an output end of the voltage comparing module 134 and an output end of the current comparing module 135, and in a default state, the normally closed switch is in a closed state; when the normally closed switch receives the turn-off signal, the normally closed switch is in an off state.

Taking the switching module 133 as an example, the switching device includes two switching devices, where the normally closed movable contact of the first normally closed switch is connected to the power circuit 110, the normally closed stationary contact of the first normally closed switch is connected to the normally closed movable contact of the second normally closed switch, the normally closed stationary contact of the second normally closed switch is connected to the power amplifying circuit 120, the controlled contact of the first normally closed switch is connected to the output end of the voltage comparing module 134, the controlled contact of the second normally closed switch is connected to the output end of the current comparing module 135, and in a default state, both the first normally closed switch and the second normally closed switch are in a closed state; when the first normally-closed switch and the second normally-closed switch receive the turn-off signal, the first normally-closed switch and the second normally-closed switch are in an off state.

The first end of the voltage comparison module 134 may be connected to the first ends of the power circuit 110 and the switch module 133, respectively, for inputting a power supply signal, the first end of the voltage comparison module 134 may also be connected to the second end of the switch module 133, and the power end of the power amplifying circuit 120, respectively, for inputting a power supply signal, the second end of the voltage comparison module 134 is connected to the output end of the reference voltage source 131, the output end of the voltage comparison module 134 is connected to the controlled end of the switch module 133, and the voltage comparison module 134 is used for turning on the voltage comparison mode when the reference voltage is input, so as to output a turn-off signal when the comparison result of the voltage value of the power supply signal and the reference voltage meets a preset turn-off condition.

Alternatively, the comparison result satisfying the preset off condition of the voltage comparison mode may include the voltage value of the power supply signal being smaller than the reference voltage. When the power amplifying circuit 120 works normally, the power circuit 110 and the reference voltage source 131 can be configured to output the power supply voltage and the reference voltage with the same voltage or the same voltage range respectively, or the output power supply voltage is larger than the reference voltage, so that the comparison result does not meet the preset turn-off condition during normal working, and the voltage comparison module 134 can output a turn-on signal to keep the module on or the switch module 133 is turned on by default; when the power amplifying circuit 120 works abnormally, for example, when burned out, a short circuit occurs in the power amplifying circuit 120, which is equivalent to that the power supply circuit 110 is directly shorted to the ground, at this time, the power supply voltage is reduced to 0V or close to 0, and the reference voltage remains unchanged, so that the comparison result meets the preset turn-off condition, and the voltage comparison module 134 outputs a turn-off signal to turn off the switch module 133. Alternatively, both the supply voltage and the reference voltage may be high levels of 4.5V-5.0V when the power amplifying circuit 120 is normally powered, and the supply voltage is changed from a high level signal of 4.5V-5.0V to a low level of 0V or close to 0 when the power amplifying circuit 120 is abnormally operated, so that the voltage comparing module 134 outputs the off signal.

The first end of the current comparison module 135 is used for inputting a power supply signal, the second end of the current comparison module 135 is connected with the output end of the reference current source 132, the output end of the current comparison module 135 is connected with the controlled end of the switch module 133, the current comparison module 135 is used for starting a current comparison mode when a reference current is input so as to obtain a current value of the power supply signal, and outputting a turn-off signal when the comparison result of the current value and the reference current meets a preset turn-off condition.

Optionally, the comparison result meets the preset turn-off condition of the current comparison mode may include that, for example, the current value corresponding to the power supply signal is greater than the reference current, when the power amplifying circuit 120 works normally, the current value corresponding to the power supply signal may be configured to be the same as the reference current or the reference current is greater than the current value corresponding to the power supply signal, so that the comparison result does not meet the preset turn-off condition when the power amplifying circuit 120 works normally, and the current comparison module 135 may output a turn-on signal to keep the switch module 133 turned on or the switch module 133 turned on by default; when the power amplifying circuit 120 works abnormally, for example, when burned out, a short circuit occurs in the power amplifying circuit 120, which is equivalent to that the power circuit 110 is directly shorted to the ground, at this time, the current value corresponding to the power supply signal forms an abnormally large current, so that the current value corresponding to the power supply signal is larger than the reference current, and the current comparison module 135 outputs a turn-off signal to turn off the switch module 133.

Alternatively, as shown in fig. 3, the voltage comparison module 134 includes a voltage comparator D1, the power supply circuit 110 includes a power supply 1, the reference voltage source 131 includes a power supply 2 and a voltage dividing unit including a resistor R1 and a resistor R2. The positive voltage end V+ of the voltage comparator D1 is connected with the PA VCC voltage of the first power supply signal, the first end of the resistor R1 is connected with the power supply 2, the second end of the resistor R1, the first end of the resistor R2 and the negative voltage end V-of the voltage comparator D1 are connected together, and therefore the power supply 2 outputs the voltage of the second power supply signal to the negative voltage end V-after being divided by the resistor R1 and the resistor R2.

Taking the voltage VCC provided by both the power supply 1 and the power supply 2 as an example, the voltage value of the power supply signal is VCC, and the reference voltage is R2/(r1+r2) VCC. Under normal conditions, v+ =vcc, V- =r2/(r1+r2) VCC, at this time, v+ voltage is higher than V-, the voltage comparator D1 outputs a high-level on signal, the normally closed switch SW is in a closed state, the internal power supply path of the power amplifying circuit 120 is normal, and the power amplifying circuit 120 works normally; when the power amplifying circuit 120 burns out, the power supply 1 is shorted to ground, where v+=0v, V- =r2/(r1+r2) VCC, and v+ voltage is lower than V-, and the voltage comparator D1 outputs a low-level off signal. The switch module 133 is in an off state, and the power supply in the power amplifying circuit 120 is interrupted, so that continuous abnormal high current is avoided, and serious heating of the mobile phone caused by the abnormal high current is avoided.

Optionally, the power supply signal is a voltage signal; as shown in fig. 3, the current comparison module 135 includes a sampling unit 1351 and a current comparison unit 1352, wherein a first end of the sampling unit 1351 is used for obtaining a power supply signal, a second end of the sampling unit 1351 is connected to a first input end of the current comparison unit 1352, and a second end of the current comparison unit 1352 is connected to the reference current source 132; the sampling unit 1351 is configured to convert the power supply signal from a voltage signal to a current signal, and the current comparing unit 1352 is configured to output an off signal when a current value of the current signal is greater than a reference current value.

The current comparing unit 1352 compares the current value corresponding to the power supply signal with the reference current value, and outputs a turn-off signal to turn off the power supply path of the switching module 133 when the current value corresponding to the power supply signal is greater than the reference current; optionally, a turn-on signal is output to turn on the power supply path by the switching circuit 140 when the current value corresponding to the power supply signal is less than or equal to the reference current.

Optionally, as shown in fig. 3, the sampling unit 1351 is a resistor R3, the current comparing unit 1352 is a current comparator D2, the power circuit 110 includes a power source 1, and the reference current source 132 is a current source 2.

The first port of the current comparator D2 is connected with the current source 2, the current source 2 can be a standard current source, the reference current provided for the current comparator D2 is the reference current Iref, and the reference current Iref output by the current source 2 is configurable; the second port of the current comparator D2 is connected in series to the power supply path through a resistor R3 to obtain a power supply signal, and the input current I_det of the second port of the current comparator D2 is determined by the voltage value of the power supply signal and the resistor R3. The current I_det is in direct proportion to the voltage value of the power supply signal and in inverse proportion to the resistance value of the resistor R3; when the resistance value of the resistor R3 is determined, the voltage value of the power supply signal can be detected by the magnitude of i_det.

When the power amplifier PA works normally, the power supply signal output by the power supply 1 is set to be high level, the current i_det collected by the resistor R3 at the moment is set to be greater than the current Iref output by the current source 2, the current comparator D2 outputs a high-level conduction signal, the switch module 133 is in a closed state, the internal power supply channel of the power amplifier circuit 120 is normal, and the power amplifier circuit 120 works normally; when the power amplifying circuit 120 burns out, the power source 1 is shorted to the ground, v+=0v, i_det collected by the resistor R3 is less than the current Iref output by the current source 2, and the current comparator D2 outputs a low-level off signal. The switch module 133 is in an off state, and the power supply in the power amplifying circuit 120 is interrupted, so that continuous abnormal high current is avoided, and serious heating of the mobile phone caused by the abnormal high current is avoided.

Alternatively, the voltage comparator D1 and the current comparator D2 in the above embodiments may be integrated with separate clock circuits and counting circuits inside the device, so that the voltage comparator D1 and the current comparator D2 each have timing and counting functions, and optionally, parameter settings of each preset time, preset times, and the like may be configured in advance by software. Thus, the voltage comparator D1 and the current comparator D2 may also be configured to output a turn-on signal at intervals of a preset time after outputting the turn-off signal to control the switch module 133 to turn on the power supply path, and compare the power supply signal with the reference signal to obtain a re-comparison result; the device is also used for outputting a turn-off signal and stopping comparison under the condition that the re-comparison results meet the preset turn-off condition in the continuous preset times; and outputting a conduction signal and stopping the comparison when the comparison result meets the preset conduction condition at least once in the continuous preset times. It can be appreciated that, according to practical requirements, in other embodiments, the clock circuit may also be disposed outside the voltage comparator D1 and the current comparator D2, so as to control the comparison time periods of the voltage comparator D1 and the current comparator D2, respectively, which is not described herein.

Optionally, at least one of the switch module 133, the voltage comparison module 134 and the current comparison module 135 in the above embodiment may be integrated with the power amplification circuit 120 to form an integrated circuit as shown in fig. 4-6, so as to effectively reduce the occupied area of the radio frequency module 10, improve the integration level of the device, be beneficial to miniaturization of the device and reduce the cost.

For example, as shown IN fig. 4 (fig. 4 illustrates that the processing circuit 140 is a radio frequency transceiver, the switching module 133 includes a normally closed switch SW, the voltage comparing module 134 includes a voltage comparator D1, the current comparing module 135 includes a resistor R3 and a current comparator D2, and the power amplifying circuit 120 includes a power amplifier PA, where S1 is a controlled end of the normally closed switch SW), the power amplifying circuit 120, the switching module 133, the voltage comparing module 134 and the current comparing module 135 form a first radio frequency circuit 101, and the first radio frequency circuit 101 is configured with a first power port VCC1, a second power port VCC2, a third power port VCC3, an input port PA IN and an output port OUT; the first power port VCC1 is connected to the power circuit 110, the first end of the switch module 133, the first end of the voltage comparison module 134, and the first end of the current comparison module 135, the second power port VCC2 is connected to the reference voltage source 131 and the second end of the voltage comparison module 134, the third power port VCC3 is connected to the reference current source 132 and the second end of the current comparison module 135, the input port PA IN is connected to the input end of the power amplifying circuit 120 and the radio frequency transceiver, and the output port OUT is connected to the output end of the power amplifying circuit 120 and the antenna ANT.

For example, as shown IN fig. 5 (fig. 5 illustrates that the processing circuit 140 is a radio frequency transceiver, the switch module 133 includes a normally closed switch SW, the voltage comparison module 134 includes a voltage comparator D1, the current comparison module 135 includes a resistor R3 and a current comparator D2, and the power amplifying circuit 120 includes a power amplifier PA, where S1 is a controlled end of the normally closed switch SW), the power amplifying circuit 120, the voltage comparison module 134 and the current comparison module 135 form a second radio frequency circuit 102, and the second radio frequency circuit 102 is configured with a second power port VCC2, a third power port VCC3, a fourth power port VCC4, an input port PA IN and an output port OUT; the fourth power port VCC4 is connected to the second end of the switch module 133, the power end of the power amplifying circuit 120, the first end of the voltage comparing module 134, and the first end of the current comparing module 135, the second power port VCC2 is connected to the reference voltage source 131 and the second end of the voltage comparing module 134, the third power port VCC3 is connected to the reference current source 132 and the second end of the current comparing module 135, the input port PA IN is connected to the input end of the power amplifying circuit 120 and the radio frequency transceiver, and the output port OUT is connected to the output end of the power amplifying circuit 120 and the antenna ANT.

For example, as shown IN fig. 6 (fig. 6 illustrates that the processing circuit 140 is a radio frequency transceiver, the switch module 133 includes a normally closed switch SW, the voltage comparison module 134 includes a voltage comparator D1, the current comparison module 135 includes a resistor R3 and a current comparator D2, and the power amplifying circuit 120 includes a power amplifier PA, where S1 is a controlled end of the normally closed switch SW), the power amplifying circuit 120 and the switch module 133 form a third radio frequency circuit 103, and the third radio frequency circuit 103 is configured with a first power supply port VCC1, a controlled port SCT, an input port PA IN, and an output port OUT; the first power port VCC1 is connected to the power circuit 110, the first end of the switch module 133, the first end of the voltage comparison module 134, and the first end of the current comparison module 135, the controlled port SCT is connected to the output end of the voltage comparison module 134, the output end of the current comparison module 135, and the controlled end of the switch module 133, the input port PA IN is connected to the input end of the power amplifying circuit 120 and the radio frequency transceiver, and the output port OUT is connected to the output end of the power amplifying circuit 120 and the antenna ANT.

Optionally, the power amplifying circuit 120 in the foregoing embodiment may include a plurality of power amplifiers, where the number of the switch modules 133, the voltage comparing modules 134, and the current comparing modules 135 is plural, the controlled ends of the plurality of switch modules 133 are connected to the output ends of the plurality of voltage comparing modules 134 and the output ends of the plurality of current comparing modules 135 in a one-to-one correspondence manner, the first end of each voltage comparing module 134 and the first end of the current comparing module 135 are used to obtain the power supply signal on the corresponding power supply path, each power amplifier is connected to the power supply circuit 110 through the corresponding switch module 133, and each power amplifier is connected to one antenna. Thus, the on-off state of the power supply path of each power amplifier is determined by the corresponding switching module 133, the target operating mode corresponding voltage comparison module 134, or the current comparison module 135. By providing the corresponding switch module 133 for each power supply path of the power amplifier, the protection circuit 130 controls the switch module 133 of the corresponding power supply path to be turned off to disconnect the power supply path in which the abnormality occurs when the power supply path of the corresponding power amplifier occurs.

It should be noted that, when the number of the power amplifiers is plural, different power amplifiers may be powered by the same or different power circuits 110, and different voltage comparison modules 134 and current comparison modules 135 may also be powered by the same or different reference voltage sources 131 and reference current sources 132, which may be specifically adjusted according to actual requirements. When the power amplifying circuit 120 includes a plurality of power amplifiers, the power amplifying circuit 120 may be understood as a Multi-band Multi-mode power amplifier (MMPA) integrating the plurality of power amplifiers. The plurality of power amplifiers may form a plurality of transmit paths, thereby enabling the power amplification circuit 120 to support multiple transmit processes, improving communication quality and user experience.

The above-mentioned division of the circuits in the rf module 10 is merely for illustration, and in other embodiments, the rf module 10 may be divided into different circuits as needed to complete all or part of the functions of the above-mentioned rf module.

It should be noted that, the radio frequency module 10 may further include other auxiliary functional circuits, for example, the radio frequency module 10 may further include a filter circuit, where the filter circuit is connected to the radio frequency transceiver and the power amplifying circuit 120, respectively, and is configured to filter the radio frequency signal output by the radio frequency transceiver and output the radio frequency signal to the power amplifying circuit 120. The filter circuit may be integrated in the power amplifying circuit 120, the first radio frequency circuit 101, the second radio frequency circuit 102, or the third radio frequency circuit 103 in the above embodiments, or may be disposed outside the power amplifying circuit 120, the first radio frequency circuit 101, the second radio frequency circuit 102, or the third radio frequency circuit 103.

As shown in fig. 7, in one embodiment, the method for protecting a radio frequency module according to the embodiment of the present application further includes: step 702-step 706.

Step 702, obtaining a target amplification power of the power amplification circuit for amplifying the power of the received radio frequency signal in the current radio frequency scene.

Step 704, selecting a target operation mode according to the target amplified power, wherein the target operation mode comprises one of a voltage comparison mode and a current comparison mode.

Step 706, obtaining a power supply signal of a power supply channel between the power supply circuit and the power amplification circuit, and if the comparison result of the power supply signal and the reference signal corresponding to the target working mode meets the preset turn-off condition of the target working mode, cutting off the power supply channel.

The power supply circuit, the power amplifying circuit, the current radio frequency scene, the target working mode, the reference signal, and the like are described in the above embodiments, and are not described herein; steps 1002 to 1004 may be performed by the processing circuit in the foregoing embodiment, and step 1004 may be performed by the protection circuit in the foregoing embodiment, and specific reference may be made to the description related to the foregoing embodiment, which is not repeated herein.

According to the protection method of the radio frequency module, the target amplification power of the power amplification circuit for amplifying the power of the received radio frequency signal in the current radio frequency scene is obtained; selecting a target working mode according to the target amplified power, wherein the target working mode comprises one of a voltage comparison mode and a current comparison mode; and acquiring a power supply signal of a power supply channel between the power supply circuit and the power amplification circuit, and disconnecting the power supply channel if a comparison result of the power supply signal and a reference signal corresponding to the target working mode meets a preset turn-off condition of the target working mode. The voltage comparison mode has a faster response speed, and can efficiently and quickly obtain a comparison result so as to be more suitable for a radio frequency scene with larger amplified power; the current comparison mode has higher sensitivity and accuracy so as to be more suitable for radio frequency scenes with smaller amplified power or the amplified power switching; therefore, the protection method can be matched with different radio frequency scene requirements to carry out protection in different comparison modes, so that severe heating caused by continuous abnormal large current of the power amplification circuit is avoided under the scene of low probability burning.

In one embodiment, as shown in fig. 8, the method for protecting a radio frequency module further includes: step 802-step 804.

Step 802, after the power supply path is disconnected, controlling the power supply path to switch from the disconnected state to the on state in the target working mode at intervals of preset time, and comparing the power supply signal with a reference signal corresponding to the target working mode to obtain a re-comparison result.

Step 804, when the comparison result again meets the preset turn-off condition in the continuous preset times, the power supply path is controlled to be turned off and the comparison is stopped.

The steps 802 to 804 may be performed by the protection circuit in the above embodiment, and specific reference may be made to the related description of the above embodiment, which is not repeated herein.

In one embodiment, as shown in fig. 8, the method for protecting a radio frequency module further includes: step 806.

Step 806, when the comparison result at least once in the continuous preset times meets the preset conduction condition corresponding to the target working mode, controlling the conduction of the power supply channel and stopping detection; wherein the preset on condition and the preset off condition are different.

The preset on condition and the preset off condition are referred to the related descriptions in the above embodiments, and are not repeated here. Step 806 may be performed by the protection circuit in the above embodiment, and specific reference may be made to the related description of the above embodiment, which is not repeated herein.

The embodiment of the application also provides communication equipment, which can comprise the radio frequency module in any embodiment. The communication equipment of the embodiment comprises the radio frequency module in any embodiment, and can be used for carrying out protection in different comparison modes according to different radio frequency scene requirements, so that severe heating caused by continuous abnormal high current of the power amplification circuit under the scene of low probability burning is avoided.

The embodiment of the application also provides communication equipment which can comprise a power supply circuit, a power amplifying circuit, a memory and a processor.

The power supply circuit and the power amplifying circuit may be referred to the related descriptions in the above embodiments, and are not described herein.

The memory stores a computer program, and the processor executes the computer program to implement the steps of the method for protecting a radio frequency module according to the above embodiment.

The communication equipment of the embodiment comprises a power supply circuit, a power amplification circuit, a memory and a processor, and can be used for carrying out protection in different comparison modes according to different radio frequency scene requirements so as to avoid serious heating caused by continuous abnormal large current of the power amplification circuit in a scene of low probability burnout.

As shown in fig. 9, further, the above communication device is exemplified as the mobile phone 11, specifically, as shown in fig. 9, the mobile phone 11 may include a memory 21 (which optionally includes one or more computer readable storage media), a processor 22, a peripheral 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. It will be appreciated by those skilled in the art that the handset 11 shown in fig. 9 is not limiting and may include more or fewer components than shown, or may be combined with certain components, or a different arrangement of components. The various components shown in fig. 9 are implemented in hardware, software, or a combination of both hardware and software, including one or more signal processing and/or application specific integrated circuits.

Memory 21 optionally includes high-speed random access memory, and also optionally includes non-volatile memory, such as one or more magnetic disk storage devices, flash memory devices, or other non-volatile solid-state memory devices. Illustratively, the software components stored in the memory 21 include an operating system 211, a communication circuit (or instruction set) 212, a Global Positioning System (GPS) circuit (or instruction set) 213, and the like.

The processor 22 and other control circuitry, such as control circuitry in the radio frequency system 24, may be used to control the operation of the handset 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, and the like.

The processor 22 may be configured to implement a control algorithm that controls the use of the antenna in the handset 11. The processor 22 may also issue control commands or the like for controlling the various switches in the radio frequency system 24.

The I/O subsystem 26 couples input/output peripheral devices on the handset 11, such as keypads and other input control devices, to the peripheral interface 23. The I/O subsystem 26 optionally includes a touch screen, keys, tone generator, accelerometer (motion sensor), ambient light sensor and other sensors, light emitting diodes, and other status indicators, data ports, etc. Illustratively, a user may control the operation of the handset 11 by supplying commands via the I/O subsystem 26, and may use the output resources of the I/O subsystem 26 to receive status information and other outputs from the handset 11. For example, a user may activate the handset or deactivate the handset by pressing button 261.

The rf system 24 may include the rf module 10 of any of the previous embodiments.

The embodiment of the application also provides a computer readable storage medium. One or more non-transitory computer-readable storage media containing computer-executable instructions that, when executed by one or more processors, cause the processors to perform the steps of a method of protecting a radio frequency module.

The embodiment of the application also provides a computer program product containing instructions, which when run on a computer, cause the computer to execute the method for protecting the radio frequency module.

Any reference to memory, storage, database, or other medium used in the present application may include non-volatile and/or volatile memory. Suitable nonvolatile memory can include Read Only Memory (ROM), programmable ROM (PROM), electrically Programmable ROM (EPROM), electrically Erasable Programmable ROM (EEPROM), or flash memory. Volatile memory can include random access memory (RM), which acts as external cache memory. By way of illustration and not limitation, RMs are available in a variety of forms, such as Static RMs (SRMs), dynamic RMs (DRMs), synchronous DRMs (SDRMs), double data rates SDRM (DDR SDRM), enhanced SDRMs (ESDRMs), synchronous link (synchronous) DRMs (SLDRMs), memory bus (Rmbus) direct RMs (RDRMs), direct memory bus dynamic RMs (DRDRMs), and memory bus dynamic RMs (RDRMs).

The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The foregoing examples illustrate only a few embodiments of the application, which are described in detail and are not to be construed as limiting the scope of the application. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the application, which are all within the scope of the application. Accordingly, the scope of protection of the present application is to be determined by the appended claims.

Claims

1. A radio frequency module, comprising:

A power supply circuit;

the protection circuit is further configured to obtain the power supply signal of the power supply path, and disconnect the power supply path if a comparison result of the power supply signal and a reference signal corresponding to the target working mode meets a preset off condition of the target working mode.

2. The radio frequency module according to claim 1, wherein the protection circuit is configured to control, in the target operation mode, the power supply path to switch from an off state to an on state at an interval of a preset time after the power supply path is turned off, and compare the power supply signal with the reference signal corresponding to the target operation mode to obtain a re-comparison result; and the power supply channel is also used for controlling the power supply channel to be turned off and stopping comparison when the re-comparison results meet the preset turn-off condition in the continuous preset times.

3. The radio frequency module according to claim 2, wherein the protection circuit is further configured to control the power supply path to be turned on and stop detection when the re-comparison result at least once satisfies a preset conduction condition corresponding to the target operation mode in a continuous preset number of times;

wherein the preset on condition and the preset off condition are different.

4. The radio frequency module of claim 1, wherein the protection circuit comprises:

a reference voltage source and a reference current source;

the first end of the switch module is connected with the power supply circuit, the second end of the switch module is connected with the power supply end of the power amplifying circuit, and the switch module is used for turning off the power supply path when receiving a turn-off signal;

the first end of the voltage comparison module is used for inputting the power supply signal, the second end of the voltage comparison module is connected with the output end of the reference voltage source, the output end of the voltage comparison module is connected with the controlled end of the switch module, the voltage comparison module is used for starting a voltage comparison mode when the reference voltage is input, and outputting the turn-off signal when the comparison result of the voltage value of the power supply signal and the reference voltage meets the preset turn-off condition of the voltage comparison mode;

The first end of the current comparison module is used for inputting the power supply signal, the second end of the current comparison module is connected with the output end of the reference current source, the output end of the current comparison module is connected with the controlled end of the switch module, the current comparison module is used for starting a current comparison mode when a reference current is input so as to acquire a current value of the power supply signal, and outputting the turn-off signal when the comparison result of the current value and the reference current meets the preset turn-off condition of the current comparison mode;

the processing circuit is respectively connected with the controlled end of the reference voltage source and the controlled end of the reference current source and is used for controlling the reference voltage source to output the reference voltage when the target amplified power meets a first power condition and controlling the reference current source to output the reference current when the target amplified power meets a second power condition; the first power condition and the second power condition are different.

5. The radio frequency module of claim 4, wherein the first power condition comprises the target amplified power being greater than a preset threshold; the second power condition includes the target amplified power being less than a preset threshold; or alternatively

The first power condition comprises that the target amplified power is continuously unchanged in a preset time period; the second power condition includes that the target amplified power is switched at least twice with different values in a preset time period.

6. The radio frequency module of claim 4, wherein the power supply signal is a voltage signal; the current comparison module comprises a sampling unit and a current comparison unit, wherein a first end of the sampling unit is used for acquiring the power supply signal, a second end of the sampling unit is connected with a first input end of the current comparison unit, and a second end of the current comparison unit is connected with the reference current source;

the sampling unit is used for converting the power supply signal from the voltage signal to a current signal, and the current comparison unit is used for outputting the disconnection signal when the current value of the current signal is larger than the reference current.

7. The radio frequency module according to any one of claims 4-6, wherein the power amplification circuit, the switching module, the voltage comparison module, and the current comparison module constitute a first radio frequency circuit configured with a first power supply port, a second power supply port, a third power supply port, an input port, and an output port;

The first power port is respectively connected with the power circuit, the first end of the switch module, the first end of the voltage comparison module and the first end of the current comparison module, the second power port is respectively connected with the reference voltage source and the second end of the voltage comparison module, the third power port is respectively connected with the reference current source and the second end of the current comparison module, the input port is respectively connected with the input end of the power amplification circuit and the radio frequency transceiver, and the output port is respectively connected with the output end of the power amplification circuit and the antenna.

8. The radio frequency module according to any one of claims 4-6, wherein the power amplification circuit, the voltage comparison module, and the current comparison module constitute a second radio frequency circuit configured with a second power supply port, a third power supply port, a fourth power supply port, an input port, and an output port;

the fourth power port is respectively connected with the second end of the switch module, the power end of the power amplification circuit, the first end of the voltage comparison module and the first end of the current comparison module, the second power port is respectively connected with the reference voltage source and the second end of the voltage comparison module, the third power port is respectively connected with the reference current source and the second end of the current comparison module, the input port is respectively connected with the input end of the power amplification circuit and the radio frequency transceiver, and the output port is respectively connected with the output end of the power amplification circuit and the antenna.

9. The radio frequency module according to any one of claims 4-6, wherein the power amplification circuit and the switching module constitute a third radio frequency circuit configured with a first power supply port, a controlled port, an input port, and an output port;

the first power port is respectively connected with the power circuit, the first end of the switch module, the first end of the voltage comparison module and the first end of the current comparison module, the controlled port is respectively connected with the output end of the voltage comparison module, the output end of the current comparison module and the controlled end of the switch module, the input port is respectively connected with the input end of the power amplification circuit and the radio frequency transceiver, and the output port is respectively connected with the output end of the power amplification circuit and the antenna.

10. The method for protecting the radio frequency module is characterized by comprising the following steps:

11. A communication device, comprising:

the radio frequency module of any of claims 1-9.

12. A communication device, comprising:

a memory storing a computer program and a processor implementing the steps of the protection method according to claim 10 when the processor executes the computer program.

13. A computer-readable storage medium, on which a computer program is stored, characterized in that the computer program, when being executed by a processor, implements the steps of the protection method as claimed in claim 10.