CN110212877B - Circuit control method, electronic equipment and radio frequency circuit - Google Patents
Circuit control method, electronic equipment and radio frequency circuit Download PDFInfo
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- CN110212877B CN110212877B CN201910471102.4A CN201910471102A CN110212877B CN 110212877 B CN110212877 B CN 110212877B CN 201910471102 A CN201910471102 A CN 201910471102A CN 110212877 B CN110212877 B CN 110212877B
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
- H03F1/52—Circuit arrangements for protecting such amplifiers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/40—Circuits
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Abstract
The invention provides a circuit control method, electronic equipment and a radio frequency circuit, wherein the circuit control method is applied to the electronic equipment, the electronic equipment comprises the radio frequency circuit, and the radio frequency circuit comprises a transceiver, a power amplifier, a bidirectional coupler and a first radio frequency channel which are electrically connected in sequence; the first coupling output end of the bidirectional coupler is electrically connected with the first end of the first change-over switch, and the second coupling output end of the bidirectional coupler is electrically connected with the second end of the first change-over switch; the first radio frequency path comprises a first filter, a first antenna switch and a first antenna which are electrically connected in sequence; the method comprises the following steps: detecting reflected power at an output end of the power amplifier through the bidirectional coupler; and under the condition that the reflected power is larger than a first threshold value, performing protection processing on the power amplifier. The circuit control method provided by the invention can reduce the damage of the power amplifier caused by the mismatch of the load of the power amplifier.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a circuit control method, an electronic device, and a radio frequency circuit.
Background
The Power Amplifier (PA) is a main component in the rf system, and in the front-stage circuit of the transmitter, the power of the rf signal generated by the modulating oscillation circuit is small, and the rf signal needs to be amplified by the power amplifier to obtain a sufficiently large rf output power, so that the rf output power can be fed to the antenna to radiate.
In general, a power amplifier is often an expensive and power-consuming device in an electronic device, and its radio frequency performance and reliability often directly affect the distance, signal quality, standby time, and the like of wireless communication of the electronic device. And therefore the power amplifier once disabled has a greater impact on the overall radio frequency system.
However, in the prior art, in case of mismatch of the output load of the power amplifier, the power amplifier is easily burned out. For example, when the load of the power amplifier is disconnected, short-circuit is connected or impedance is not matched, part of the signals are reflected back to the signal source, and at the moment, forward waves and backward waves are generated, and the two signals are combined together to form standing waves, and when the backward waves are large, namely high-power backward pushing, the power amplifier is easy to damage.
It can be seen that the problem in the prior art is that the power amplifier is damaged easily due to the load mismatch of the power amplifier.
Disclosure of Invention
The embodiment of the invention provides a circuit control method, electronic equipment and a radio frequency circuit, which are used for solving the problem that a power amplifier is easy to damage due to load mismatch of the power amplifier.
In order to solve the technical problems, the invention is realized as follows:
in a first aspect, an embodiment of the present invention provides a circuit control method, where the method is applied to an electronic device, where the electronic device includes a radio frequency circuit, where the radio frequency circuit includes a transceiver, a power amplifier, a bidirectional coupler, and a first radio frequency path that are electrically connected in sequence; the first coupling output end of the bidirectional coupler is electrically connected with the first end of the first change-over switch, and the second coupling output end of the bidirectional coupler is electrically connected with the second end of the first change-over switch; the first radio frequency path comprises a first filter, a first antenna switch and a first antenna which are electrically connected in sequence;
the method comprises the following steps:
detecting reflected power at an output end of the power amplifier through the bidirectional coupler;
and under the condition that the reflected power is larger than a first threshold value, performing protection processing on the power amplifier.
In a second aspect, an embodiment of the present invention further provides an electronic device, where the electronic device includes a radio frequency circuit, where the radio frequency circuit includes a transceiver, a power amplifier, a bidirectional coupler, and a first radio frequency path that are electrically connected in sequence; the first coupling output end of the bidirectional coupler is electrically connected with the first end of the first change-over switch, and the second coupling output end of the bidirectional coupler is electrically connected with the second end of the first change-over switch; the first radio frequency path comprises a first filter, a first antenna switch and a first antenna which are electrically connected in sequence;
the electronic device further includes:
the detection module is used for controlling the bidirectional coupler to detect the reflected power of the output end of the power amplifier;
and the processing module is used for protecting the power amplifier under the condition that the reflected power is larger than a first threshold value.
In a third aspect, an embodiment of the present invention provides a radio frequency circuit, including a transceiver, a power amplifier, a bidirectional coupler, a first switch, a first radio frequency path, a second radio frequency path, and a second switch;
the transceiver, the power amplifier and the bidirectional coupler are electrically connected in sequence;
the first coupling output end of the bidirectional coupler is electrically connected with the first end of the first change-over switch, and the second coupling output end of the bidirectional coupler is electrically connected with the second end of the first change-over switch;
the second radio frequency path and the first radio frequency path are respectively and electrically connected with the bidirectional coupler through a second change-over switch, wherein the first radio frequency path comprises a first filter, a first antenna switch and a first antenna which are sequentially and electrically connected, and the second radio frequency path comprises a second filter, a second antenna switch and a second antenna which are sequentially and electrically connected.
In a fourth aspect, an embodiment of the present invention further provides an electronic device, including the radio frequency circuit described above.
In a fifth aspect, an embodiment of the present invention further provides an electronic device, including a processor, a memory, and a computer program stored in the memory and capable of running on the processor, where the computer program is executed by the processor to implement the steps of the circuit control method described above.
In a sixth aspect, an embodiment of the present invention further provides a computer readable storage medium, on which a computer program is stored, which when executed by a processor, implements the steps of the circuit control method described above.
In the embodiment of the invention, the reflected power of the output end of the power amplifier is detected through the bidirectional coupler, and the power amplifier is protected under the condition that the reflected power is larger than the first threshold value, so that the damage of the power amplifier caused by the load mismatch of the power amplifier can be reduced, and the effectiveness of the power amplifier is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the description of the embodiments of the present invention will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort to a person of ordinary skill in the art.
Fig. 1 is a block diagram of a radio frequency circuit provided in an embodiment of the present invention;
FIG. 2 is a flow chart of a circuit control method provided by an embodiment of the present invention;
FIG. 3 is a block diagram of a radio frequency circuit provided in accordance with yet another embodiment of the present invention;
FIG. 4 is a flow chart of a circuit control method according to another embodiment of the present invention;
fig. 5 is a block diagram of an electronic device according to an embodiment of the present invention;
fig. 6 is a block diagram of an electronic device according to still another embodiment of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The embodiment of the invention provides a circuit control method which is applied to electronic equipment. The electronic device includes a radio frequency circuit. Referring to fig. 1, the radio frequency circuit includes a transceiver 10, a power amplifier 20, a bi-directional coupler 30, and a first radio frequency path 50 electrically connected in sequence; a first coupling output end of the bidirectional coupler 30 is electrically connected with a first end of the first change-over switch 40, and a second coupling output end of the bidirectional coupler 30 is electrically connected with a second end of the first change-over switch 40; the first rf path 50 includes a first filter 51, a first antenna switch 52, and a first antenna 53 electrically connected in sequence.
In the embodiment of the present invention, the Transceiver 10 (i.e., transmitter) may be used for frequency conversion, channel selection, etc. of radio frequency signals. The power amplifier 20 described above may be used for amplification of radio frequency signals. The first filter 51 may be used for filtering the radio frequency signal. The first antenna switch 52 described above may be used for switching between the receive channel and the transmit channel.
The bi-directional coupler 30 may be used to detect both forward rf signal power (i.e., transmit power) and reverse rf signal power (i.e., reflected power). Specifically, the power detection direction of the bi-directional coupler 30 may be switched by the first switch 40, that is, the bi-directional coupler 30 may be switched by the first switch 40 to detect the transmission power or detect the transmission power.
Alternatively, the first switch 40 may be a single pole double throw (Single Pole Double Throw, SPDT) switch, wherein a first contact of the first switch 40 is electrically connected to the first coupling output of the bi-directional coupler 30, a second contact of the first switch 40 is electrically connected to the second coupling output of the bi-directional coupler 30, and a third contact of the first antenna switch 40 is electrically connected to the transceiver 10.
For example, referring to fig. 1, the first switch 40 is an SPDT switch, wherein the contact a1 of the first switch 40 is electrically connected to the first coupling output terminal of the bidirectional coupler 30, the contact a2 of the first switch 40 is electrically connected to the second coupling output terminal of the bidirectional coupler 30, and the contact c1 of the first switch 40 may be electrically connected to the FBRX port of the transceiver 10. If the contact a1 of the first switch 40 is electrically connected to the forward coupling output terminal of the bi-directional coupler 30, the contact a2 of the first switch 40 is electrically connected to the reverse coupling output terminal of the bi-directional coupler 30, so that when the first switch 40 is turned on the contact a1, the bi-directional coupler 30 detects the transmission power of the output terminal of the power amplifier and transmits the transmission power to the transceiver 10 through the FBRX port, and thus the transmission power can be transmitted to the baseband chip or the processor, etc. through the transceiver 10. When the first changeover switch 40 turns on the contact a2, the bidirectional coupler 30 detects the reflected power at the output terminal of the power amplifier, and can transmit the reflected power to the transceiver 10 through the FBRX port, and can further transmit the transmitted power to a baseband chip, a processor, or the like via the transceiver 10.
Alternatively, the first switch 40 may include a first sub-switch having one end electrically connected to the first coupling output terminal of the bi-directional coupler 30 and the other end electrically connected to the FBRX port of the transceiver 10, and a second sub-switch having one end electrically connected to the second coupling output terminal of the bi-directional coupler 30 and the other end electrically connected to the FBRX port of the transceiver 10.
Referring to fig. 2, the circuit control method provided by the embodiment of the invention may include the following steps:
step 201, detecting reflected power at an output end of a power amplifier through a bi-directional coupler.
And 202, performing protection processing on the power amplifier under the condition that the reflected power is larger than a first threshold value.
For example, for the radio frequency circuit shown in fig. 1, the first switch may be switched every preset time period to switch the power detection direction of the bidirectional coupler. The reflected power at the output end of the power amplifier detected by the bidirectional coupler is larger than the first threshold, so that the power amplifier can be controlled to stop working, enter a standby mode (namely a stand-by mode), or reduce the gain of the power amplifier, and further, the reflected power can be reduced, thereby effectively reducing the probability of burning or damaging the power amplifier and improving the effectiveness of the power amplifier.
It should be noted that, the first threshold may be set reasonably according to actual situations. Optionally, the first threshold may be determined according to a coupling coefficient of the power amplifier and an input power withstand voltage value of an output end of the power amplifier, so as to ensure that the power amplifier is less or not affected when the reflected power is less than or equal to the first threshold.
According to the embodiment of the invention, under the condition that the reflected power of the output end of the power amplifier detected by the bidirectional coupler is larger than the first threshold value, the power amplifier is protected, so that the damage of the power amplifier caused by the load mismatch of the power amplifier can be reduced, and the effectiveness of the power amplifier is improved.
Optionally, the protection process includes one of:
reducing the gain of the power amplifier;
and controlling the power amplifier to stop working.
In an embodiment, when the reflected power is greater than the first threshold, the gain of the power amplifier may be reduced to reduce the reflected power, so that the probability that the power amplifier is burnt or damaged may be effectively reduced, and the transmission of the signal may not be interrupted.
The above-mentioned reducing the gain of the power amplifier may be directly reducing the gain of the power amplifier to a preset value, or may be gradually reducing the gain of the power amplifier according to a preset reduction amount until the detected reflected power at the output end of the power amplifier is not greater than the first threshold value. The preset value and the preset reduction amount can be reasonably set according to actual requirements, which is not limited in this embodiment.
In another embodiment, when the reflected power is greater than the first threshold, the power amplifier may be controlled to stop working, so that the power amplifier is controlled to stop transmitting the radio frequency signal, the reflected power may be reduced rapidly, and the probability of burning or damaging the power amplifier may be reduced effectively.
Optionally, the performing protection processing on the power amplifier when the reflected power is greater than a first threshold value includes:
reducing the gain of the power amplifier if the reflected power is greater than a first threshold and less than or equal to a second threshold;
and under the condition that the reflected power is larger than a second threshold value, controlling the power amplifier to stop working.
In the embodiment of the invention, the first threshold and the second threshold can be set reasonably according to actual requirements. In practical applications, if the gain of the power amplifier is reduced to below the first threshold, the gain of the power amplifier may be reduced to reduce the reflected power, and if the gain of the power amplifier is reduced to below the first threshold, the power amplifier may be directly controlled to stop working to protect the power amplifier.
According to the embodiment of the invention, under the condition that the reflected power is larger than the first threshold value and smaller than or equal to the second threshold value, the gain of the power amplifier is reduced, and under the condition that the reflected power is larger than the second threshold value, the power amplifier is controlled to stop working, so that the probability of burning or damaging the power amplifier can be effectively reduced, and the transmission of signals can be ensured to the greatest extent.
Optionally, the radio frequency circuit further includes a second radio frequency path, where the second radio frequency path includes a second filter, a second antenna switch, and a second antenna that are electrically connected in sequence, where the second radio frequency path and the first radio frequency path are electrically connected to the bidirectional coupler through a second switch respectively;
and performing protection processing on the power amplifier under the condition that the reflected power is greater than a first threshold value, wherein the protection processing comprises the following steps:
controlling a second change-over switch to a conduction target radio frequency channel under the condition that the reflected power is larger than a first threshold value;
the target radio frequency channel is the second radio frequency channel when the first radio frequency channel is conducted before switching, and the target radio frequency channel is the first radio frequency channel when the second radio frequency channel is conducted before switching.
For example, the radio frequency circuit shown in fig. 3 includes a first radio frequency path 50 and a second radio frequency path 60, and the switching between the first radio frequency path 50 and the second radio frequency path 60 is achieved by a second switch 70. If the first rf path 50 is turned on before switching, the second rf path 60 may be switched on if the reflected power is greater than the first threshold, that is, the contact b2 of the second switch 70 is controlled to be turned on; if the second rf path 60 is turned on before switching, if the reflected power is greater than the first threshold, the first rf path 50 may be switched on, that is, the contact a2 of the second switch 70 may be controlled to be turned on.
The embodiment of the invention switches the radio frequency channel under the condition that the reflected power is larger than the first threshold value, thereby not only effectively reducing the probability of burning or damaging the power amplifier, but also ensuring the transmission of signals.
Optionally, the method may further include:
and outputting prompt information under the condition that the reflected power is larger than a first threshold value, wherein the prompt information is used for indicating to restart the electronic equipment or repair the electronic equipment.
The output of the prompt message may be output through voice, or output through a display screen, or send the prompt message to a preset electronic device, etc.
In the embodiment of the invention, when the reflected power is larger than the first threshold value, the prompt information for indicating to restart the electronic equipment or maintain the electronic equipment is output, so that the abnormality can be conveniently and rapidly processed.
The circuit control method provided by the embodiment of the invention is described below with reference to examples:
for the radio frequency circuit shown in fig. 1, referring to fig. 4, the circuit control method provided in the embodiment of the present invention may include the following steps:
in step 401, a first SPDT switch turns on a contact a1, and the bidirectional coupler detects forward transmission power.
In this step, the first SPDT switch is the first changeover switch shown in fig. 1.
Step 402, whether a preset switch switching time is reached.
In this step, the preset switching time may be set reasonably according to the actual situation. Specifically, step 403 is executed if the preset switching time is reached, otherwise step 402 is executed again.
Step 403, the first SPDT switch turns on contact b1.
Step 404, the bi-directional coupler detects the back reflected power.
In this step, the reverse reflected power is the reflected power at the output of the power amplifier.
Step 405, whether the reflected power exceeds a first threshold.
In this step, step 406 is performed in case the detected reflected power exceeds a first threshold, otherwise step 404 is performed back.
Step 406, the PA stops transmitting.
In this step, the PA is also referred to as a power amplifier.
Step 407, the system pops up a restart electronic device or a maintenance prompt.
By the circuit control method provided by the embodiment of the invention, under the condition that the reflected power of the output end of the power amplifier is large, the power amplifier is controlled to stop working, so that the probability of burning or damaging the power amplifier can be effectively reduced.
The embodiment of the invention also provides a radio frequency circuit. Referring to fig. 3, the radio frequency circuit includes a transceiver 10, a power amplifier 20, a bi-directional coupler 30, a first switch 40, a first radio frequency path 50, a second radio frequency path 60, and a second switch 70;
the transceiver 10, the power amplifier 20 and the bidirectional coupler 30 are electrically connected in sequence;
a first coupling output end of the bidirectional coupler 30 is electrically connected with a first end of the first change-over switch 40, and a second coupling output end of the bidirectional coupler 30 is electrically connected with a second end of the first change-over switch 40;
the second rf path 60 and the first rf path 50 are electrically connected to the bi-directional coupler 30 via a second switch 70, respectively, wherein the first rf path 50 includes a first filter 51, a first antenna switch 52 and a first antenna 53 electrically connected in sequence, and the second rf path 60 includes a second filter 61, a second antenna switch 62 and a second antenna 63 electrically connected in sequence.
In the embodiment of the present invention, the transceiver 10 may be used for frequency conversion, channel selection, etc. of radio frequency signals. The power amplifier 20 described above may be used for amplification of radio frequency signals. The first filter 51 may be used for filtering the radio frequency signal. The first antenna switch 52 described above may be used for switching between the receive channel and the transmit channel.
The bi-directional coupler 30 may be used to detect both forward rf signal power (i.e., transmit power) and reverse rf signal power (i.e., reflected power). Specifically, the power detection direction of the bi-directional coupler 30 may be switched by the first switch 40, that is, the bi-directional coupler 30 may be switched by the first switch 40 to detect the transmission power or detect the transmission power.
Alternatively, the first switch 40 may be a single pole double throw switch, where a first contact of the first switch 40 is electrically connected to a first coupling output terminal of the bidirectional coupler 30, a second contact of the first switch 40 is electrically connected to a second coupling output terminal of the bidirectional coupler 30, and a third contact of the first antenna switch 40 may be electrically connected to the transceiver 10. Alternatively, the first switch 40 may include a first sub-switch and a second sub-switch, where one end of the first sub-switch is electrically connected to the first coupling output terminal of the bi-directional coupler 30, the other end of the first sub-switch may be electrically connected to the FBRX port of the transceiver 10, and one end of the second sub-switch is electrically connected to the second coupling output terminal of the bi-directional coupler 30, and the other end of the second sub-switch may be electrically connected to the FBRX port of the transceiver 10.
The second switch 70 may be an SPDT switch, wherein a first contact of the second switch 70 is electrically connected to the first rf path 50, a second contact of the second switch 70 is electrically connected to the second rf path 60, and a third contact of the second switch 70 is electrically connected to the bi-directional coupler 30.
For example, referring to fig. 3, the second switch 70 is an SPDT switch, wherein the contact a2 of the second switch 70 is electrically connected to the first filter 51 of the first rf path 50, the contact a2 of the second switch 70 is electrically connected to the second filter 61 of the second rf path 60, and the contact c1 of the second switch 70 may be electrically connected to the bidirectional coupler 30.
Alternatively, the second switch 70 may include a third sub-switch and a fourth sub-switch, wherein one end of the third sub-switch may be electrically connected to the first rf path 50, the other end may be electrically connected to the bidirectional coupler 30, and one end of the fourth sub-switch may be electrically connected to the second rf path 60, and the other end may be electrically connected to the bidirectional coupler 30.
In the embodiment of the present invention, the switching between the first rf path 50 and the second rf path 60 may be achieved through the second switch 70. For example, referring to fig. 3, the first rf path 50 is turned on, i.e., the rf signal is transmitted through the first rf path 50, in the case where the contact a2 of the second changeover switch 70 is turned on, and the second rf path 60 is turned on, i.e., the rf signal is transmitted through the second rf path 60, in the case where the contact b2 of the second changeover switch 70 is turned on.
In practical applications, one of the first rf path 50 and the second rf path 60 may be used as a main rf path, and the other may be used as a standby rf path. In the process of transmitting radio frequency signals through the main radio frequency channel, under the condition that the reflected power of the output end of the power amplifier is detected to be larger than a first threshold value, the load mismatch of the power amplifier is probably caused by the main radio frequency channel, and the radio frequency signals are transmitted by switching to the standby radio frequency channel, so that the influence of the load mismatch on the power amplifier can be reduced, the transmission of the signals can be ensured, and the influence on the signal transmission is reduced.
The embodiment of the invention also provides electronic equipment, which comprises the radio frequency circuit provided by the embodiment. The electronic Device may be a terminal Device, for example, a mobile phone, a tablet (Tablet Personal Computer), a Laptop (Laptop Computer), a personal digital assistant (personal digital assistant, PDA for short), or a Wearable Device. The electronic device may be a network-side device, such as a base station.
It should be noted that, the specific embodiments of the radio frequency circuit can refer to the foregoing descriptions, and the same technical effects can be achieved, so that no description is repeated for avoiding repetition.
Referring to fig. 5, fig. 5 is a block diagram of an electronic device according to an embodiment of the present invention, where the electronic device includes a radio frequency circuit, and the radio frequency circuit includes a transceiver, a power amplifier, a bidirectional coupler, and a first radio frequency path that are electrically connected in sequence; the first coupling output end of the bidirectional coupler is electrically connected with the first end of the first change-over switch, and the second coupling output end of the bidirectional coupler is electrically connected with the second end of the first change-over switch; the first radio frequency path comprises a first filter, a first antenna switch and a first antenna which are electrically connected in sequence. As shown in fig. 5, the electronic device 500 further includes:
the detection module 501 is configured to detect reflected power at an output end of the power amplifier through a bidirectional coupler;
and the processing module 502 is configured to perform protection processing on the power amplifier if the reflected power is greater than a first threshold.
Optionally, the protection process includes one of:
reducing the gain of the power amplifier;
and controlling the power amplifier to stop working.
Optionally, the processing module 502 is specifically configured to:
reducing the gain of the power amplifier if the reflected power is greater than a first threshold and less than or equal to a second threshold;
and under the condition that the reflected power is larger than a second threshold value, controlling the power amplifier to stop working.
Optionally, the radio frequency circuit further includes a second radio frequency path, where the second radio frequency path includes a second filter, a second antenna switch, and a second antenna that are electrically connected in sequence, where the second radio frequency path and the first radio frequency path are electrically connected to the bidirectional coupler through a second switch respectively;
the processing module 502 is specifically configured to:
controlling a second change-over switch to a conduction target radio frequency channel under the condition that the reflected power is larger than a first threshold value;
the target radio frequency channel is the second radio frequency channel when the first radio frequency channel is conducted before switching, and the target radio frequency channel is the first radio frequency channel when the second radio frequency channel is conducted before switching.
Optionally, the first threshold is determined according to a coupling coefficient of the power amplifier and an input power withstand voltage value of an output end of the power amplifier.
Optionally, the electronic device 500 further includes:
and the output module is used for outputting prompt information under the condition that the reflected power is larger than a first threshold value, wherein the prompt information is used for indicating to restart the electronic equipment or repair the electronic equipment.
The electronic device 500 provided in the embodiment of the present invention can implement each process of the circuit control method in the above method embodiment, and in order to avoid repetition, a description is omitted here.
The electronic device 500 of the embodiment of the invention comprises a detection module 501, a power amplifier and a power amplifier, wherein the detection module 501 is used for detecting the reflected power of the output end of the power amplifier through a bidirectional coupler; and the processing module 502 is configured to perform protection processing on the power amplifier if the reflected power is greater than a first threshold. The damage of the power amplifier caused by the load mismatch of the power amplifier can be reduced, and the effectiveness of the power amplifier is improved.
Fig. 6 is a block diagram of an electronic device according to still another embodiment of the present invention. Referring to fig. 6, the electronic device 600 includes, but is not limited to: radio frequency unit 601, network module 602, audio output unit 603, input unit 604, sensor 605, display unit 606, user input unit 607, interface unit 608, memory 609, processor 610, and power supply 611. It will be appreciated by those skilled in the art that the electronic device structure shown in fig. 6 is not limiting of the electronic device and that the electronic device may include more or fewer components than shown, or may combine certain components, or a different arrangement of components. In the embodiment of the invention, the electronic equipment comprises, but is not limited to, a mobile phone, a tablet computer, a notebook computer, a palm computer, a vehicle-mounted terminal, a wearable device, a pedometer and the like.
It should be understood that, in the embodiment of the present invention, the radio frequency unit 601 may be used to receive and send information or signals during a call, specifically, receive downlink data from a base station, and then process the downlink data with the processor 610; and, the uplink data is transmitted to the base station. In addition, the radio frequency unit 601 may also communicate with networks and other devices through a wireless communication system. The radio frequency unit 601 may include a radio frequency circuit provided in any of the above embodiments.
Wherein the processor 610 is configured to detect, by the bidirectional coupler, reflected power at an output of the power amplifier; and under the condition that the reflected power is larger than a first threshold value, performing protection processing on the power amplifier.
Optionally, the protection process includes one of:
reducing the gain of the power amplifier;
and controlling the power amplifier to stop working.
Optionally, the processor 610 is further configured to:
reducing the gain of the power amplifier if the reflected power is greater than a first threshold and less than or equal to a second threshold;
and under the condition that the reflected power is larger than a second threshold value, controlling the power amplifier to stop working.
Optionally, the radio frequency circuit further includes a second radio frequency path, where the second radio frequency path includes a second filter, a second antenna switch, and a second antenna that are electrically connected in sequence, where the second radio frequency path and the first radio frequency path are electrically connected to the bidirectional coupler through a second switch respectively;
the processor 610 is further configured to:
controlling a second change-over switch to a conduction target radio frequency channel under the condition that the reflected power is larger than a first threshold value;
the target radio frequency channel is the second radio frequency channel when the first radio frequency channel is conducted before switching, and the target radio frequency channel is the first radio frequency channel when the second radio frequency channel is conducted before switching.
Optionally, the first threshold is determined according to a coupling coefficient of the power amplifier and an input power withstand voltage value of an output end of the power amplifier.
Optionally, the processor 610 is further configured to:
and outputting prompt information under the condition that the reflected power is larger than a first threshold value, wherein the prompt information is used for indicating to restart the electronic equipment or repair the electronic equipment.
The electronic device provides wireless broadband internet access to the user via the network module 602, such as helping the user to send and receive e-mail, browse web pages, and access streaming media, etc.
The audio output unit 603 may convert audio data received by the radio frequency unit 601 or the network module 602 or stored in the memory 609 into an audio signal and output as sound. Also, the audio output unit 603 may also provide audio output (e.g., a call signal reception sound, a message reception sound, etc.) related to a specific function performed by the electronic device 600. The audio output unit 603 includes a speaker, a buzzer, a receiver, and the like.
The input unit 604 is used for receiving audio or video signals. The input unit 604 may include a graphics processor (Graphics Processing Unit, GPU) 6041 and a microphone 6042, the graphics processor 6041 processing image data of still pictures or video obtained by an image capturing apparatus (such as a camera) in a video capturing mode or an image capturing mode. The processed image frames may be displayed on the display unit 606. The image frames processed by the graphics processor 6041 may be stored in the memory 609 (or other storage medium) or transmitted via the radio frequency unit 601 or the network module 602. Microphone 6042 may receive sound and can process such sound into audio data. The processed audio data may be converted into a format output that can be transmitted to the mobile communication base station via the radio frequency unit 601 in the case of a telephone call mode.
The electronic device 600 also includes at least one sensor 605, such as a light sensor, a motion sensor, and other sensors. Specifically, the light sensor includes an ambient light sensor and a proximity sensor, wherein the ambient light sensor can adjust the brightness of the display panel 6061 according to the brightness of ambient light, and the proximity sensor can turn off the display panel 6061 and/or the backlight when the electronic device 600 moves to the ear. As one of the motion sensors, the accelerometer sensor can detect the acceleration in all directions (generally three axes), and can detect the gravity and direction when stationary, and can be used for recognizing the gesture of the electronic equipment (such as horizontal and vertical screen switching, related games, magnetometer gesture calibration), vibration recognition related functions (such as pedometer and knocking), and the like; the sensor 605 may also include a fingerprint sensor, a pressure sensor, an iris sensor, a molecular sensor, a gyroscope, a barometer, a hygrometer, a thermometer, an infrared sensor, etc., which are not described herein.
The display unit 606 is used to display information input by a user or information provided to the user. The display unit 606 may include a display panel 6061, and the display panel 6061 may be configured in the form of a liquid crystal display (Liquid Crystal Display, LCD), an Organic Light-Emitting Diode (OLED), or the like.
The user input unit 607 may be used to receive input numeric or character information and to generate key signal inputs related to user settings and function control of the electronic device. Specifically, the user input unit 607 includes a touch panel 6071 and other input devices 6072. Touch panel 6071, also referred to as a touch screen, may collect touch operations thereon or thereabout by a user (e.g., operations of the user on touch panel 6071 or thereabout using any suitable object or accessory such as a finger, stylus, or the like). The touch panel 6071 may include two parts of a touch detection device and a touch controller. The touch detection device detects the touch azimuth of a user, detects a signal brought by touch operation and transmits the signal to the touch controller; the touch controller receives touch information from the touch detection device and converts it into touch point coordinates, which are then sent to the processor 610, and receives and executes commands sent from the processor 610. In addition, the touch panel 6071 may be implemented in various types such as resistive, capacitive, infrared, and surface acoustic wave. The user input unit 607 may include other input devices 6072 in addition to the touch panel 6071. Specifically, other input devices 6072 may include, but are not limited to, a physical keyboard, function keys (e.g., volume control keys, switch keys, etc.), a track ball, a mouse, and a joystick, which are not described herein.
Further, the touch panel 6071 may be overlaid on the display panel 6061, and when the touch panel 6071 detects a touch operation thereon or thereabout, the touch operation is transmitted to the processor 610 to determine a type of a touch event, and then the processor 610 provides a corresponding visual output on the display panel 6061 according to the type of the touch event. Although in fig. 6, the touch panel 6071 and the display panel 6061 are two independent components for implementing the input and output functions of the electronic device, in some embodiments, the touch panel 6071 and the display panel 6061 may be integrated to implement the input and output functions of the electronic device, which is not limited herein.
The interface unit 608 is an interface through which an external device is electrically connected to the electronic apparatus 600. For example, the external devices may include a wired or wireless headset port, an external power (or battery charger) port, a wired or wireless data port, a memory card port, a port for electrically connecting devices having an identification module, an audio input/output (I/O) port, a video I/O port, an earphone port, and the like. The interface unit 608 may be used to receive input (e.g., data information, power, etc.) from an external device and transmit the received input to one or more elements within the electronic apparatus 600 or may be used to transmit data between the electronic apparatus 600 and an external device.
The memory 609 may be used to store software programs as well as various data. The memory 609 may mainly include a storage program area that may store an operating system, an application program required for at least one function (such as a sound playing function, an image playing function, etc.), and a storage data area; the storage data area may store data (such as audio data, phonebook, etc.) created according to the use of the handset, etc. In addition, the memory 609 may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid state storage device.
The processor 610 is a control center of the electronic device, electrically connects various parts of the entire electronic device using various interfaces and lines, and performs various functions of the electronic device and processes data by running or executing software programs and/or modules stored in the memory 609 and invoking data stored in the memory 609, thereby performing overall monitoring of the electronic device. The processor 610 may include one or more processing units; preferably, the processor 610 may integrate an application processor that primarily handles operating systems, user interfaces, applications, etc., with a modem processor that primarily handles wireless communications. It will be appreciated that the modem processor described above may not be integrated into the processor 610.
The electronic device 600 may also include a power supply 611 (e.g., a battery) for powering the various components, and preferably the power supply 611 may be logically coupled to the processor 610 via a power management system that performs functions such as managing charging, discharging, and power consumption.
In addition, the electronic device 600 includes some functional modules, which are not shown, and will not be described herein.
Preferably, the embodiment of the present invention further provides an electronic device, including a processor 610, a memory 609, and a computer program stored in the memory 609 and capable of running on the processor 610, where the computer program when executed by the processor 610 implements each process of the above circuit control method embodiment, and the same technical effects can be achieved, and for avoiding repetition, a description is omitted herein.
The embodiment of the invention also provides a computer readable storage medium, on which a computer program is stored, which when executed by a processor, implements the processes of the above-mentioned circuit control method embodiment, and can achieve the same technical effects, and in order to avoid repetition, the description is omitted here. Wherein the computer readable storage medium is selected from Read-Only Memory (ROM), random access Memory (Random Access Memory, RAM), magnetic disk or optical disk.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
From the above description of the embodiments, it will be clear to those skilled in the art that the above-described embodiment method may be implemented by means of software plus a necessary general hardware platform, but of course may also be implemented by means of hardware, but in many cases the former is a preferred embodiment. Based on such understanding, the technical solution of the present invention may be embodied essentially or in a part contributing to the prior art in the form of a software product stored in a storage medium (e.g. ROM/RAM, magnetic disk, optical disk) comprising instructions for causing a terminal (which may be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) to perform the method according to the embodiments of the present invention.
The embodiments of the present invention have been described above with reference to the accompanying drawings, but the present invention is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and many forms may be made by those having ordinary skill in the art without departing from the spirit of the present invention and the scope of the claims, which are to be protected by the present invention.
Claims (8)
1. The circuit control method is characterized by being applied to electronic equipment, wherein the electronic equipment comprises a radio frequency circuit, and the radio frequency circuit comprises a transceiver, a power amplifier, a bidirectional coupler and a first radio frequency channel which are electrically connected in sequence; the first coupling output end of the bidirectional coupler is electrically connected with the first end of the first change-over switch, and the second coupling output end of the bidirectional coupler is electrically connected with the second end of the first change-over switch; the first radio frequency path comprises a first filter, a first antenna switch and a first antenna which are electrically connected in sequence;
the method comprises the following steps:
detecting reflected power at an output end of the power amplifier through the bidirectional coupler;
under the condition that the reflected power is larger than a first threshold value, performing protection processing on the power amplifier;
the protection process includes one of:
reducing the gain of the power amplifier;
and controlling the power amplifier to stop working.
2. The method of claim 1, wherein the protecting the power amplifier if the reflected power is greater than a first threshold value comprises:
reducing the gain of the power amplifier if the reflected power is greater than a first threshold and less than or equal to a second threshold;
and under the condition that the reflected power is larger than a second threshold value, controlling the power amplifier to stop working.
3. The method of claim 1, wherein the radio frequency circuit further comprises a second radio frequency path comprising a second filter, a second antenna switch, and a second antenna electrically connected in sequence, wherein the second radio frequency path and the first radio frequency path are electrically connected to the bi-directional coupler via a second switch, respectively;
and performing protection processing on the power amplifier under the condition that the reflected power is greater than a first threshold value, wherein the protection processing comprises the following steps:
controlling a second change-over switch to a conduction target radio frequency channel under the condition that the reflected power is larger than a first threshold value;
the target radio frequency channel is the second radio frequency channel when the first radio frequency channel is conducted before switching, and the target radio frequency channel is the first radio frequency channel when the second radio frequency channel is conducted before switching.
4. The method of claim 1, wherein the first threshold is determined based on a coupling coefficient of the power amplifier and an input power withstand voltage value of an output of the power amplifier.
5. The method according to claim 1, wherein the method further comprises:
and outputting prompt information under the condition that the reflected power is larger than a first threshold value, wherein the prompt information is used for indicating to restart the electronic equipment or repair the electronic equipment.
6. An electronic device, comprising a radio frequency circuit comprising a transceiver, a power amplifier, a bi-directional coupler and a first radio frequency path electrically connected in sequence; the first coupling output end of the bidirectional coupler is electrically connected with the first end of the first change-over switch, and the second coupling output end of the bidirectional coupler is electrically connected with the second end of the first change-over switch; the first radio frequency path comprises a first filter, a first antenna switch and a first antenna which are electrically connected in sequence;
the electronic device further includes:
the detection module is used for detecting the reflected power of the output end of the power amplifier through the bidirectional coupler;
the processing module is used for protecting the power amplifier under the condition that the reflected power is larger than a first threshold value;
the protection process includes one of:
reducing the gain of the power amplifier;
and controlling the power amplifier to stop working.
7. The radio frequency circuit is characterized by comprising a transceiver, a power amplifier, a bidirectional coupler, a first change-over switch, a first radio frequency channel, a second radio frequency channel and a second change-over switch;
the transceiver, the power amplifier and the bidirectional coupler are electrically connected in sequence;
the first coupling output end of the bidirectional coupler is electrically connected with the first end of the first change-over switch, and the second coupling output end of the bidirectional coupler is electrically connected with the second end of the first change-over switch;
the second radio frequency path and the first radio frequency path are respectively and electrically connected with the bidirectional coupler through a second change-over switch, wherein the first radio frequency path comprises a first filter, a first antenna switch and a first antenna which are sequentially and electrically connected, and the second radio frequency path comprises a second filter, a second antenna switch and a second antenna which are sequentially and electrically connected;
the second change-over switch is used for switching between the first radio frequency channel and the second radio frequency channel under the condition that the reflected power of the output end of the power amplifier is detected to be larger than a first threshold value.
8. An electronic device comprising the radio frequency circuit of claim 7.
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| CN112180352B (en) * | 2020-08-24 | 2024-06-11 | 西安空间无线电技术研究所 | High-integration comprehensive radio frequency sensing array system |
| CN112596111B (en) * | 2020-11-04 | 2024-02-13 | 普联技术有限公司 | Obstacle recognition method, device, equipment and readable storage medium |
| CN114915300B (en) * | 2021-02-09 | 2023-09-19 | 北京小米移动软件有限公司 | Antenna module, terminal equipment, antenna adjusting method and device |
| CN113037324A (en) * | 2021-02-26 | 2021-06-25 | 维沃移动通信有限公司 | Antenna switching method and device and electronic equipment |
| CN112886988B (en) * | 2021-04-08 | 2022-11-22 | 维沃移动通信有限公司 | Radio frequency system, radio frequency circuit detection method and device and electronic equipment |
| CN113691273B (en) * | 2021-08-05 | 2023-04-18 | 维沃移动通信有限公司 | Radio frequency control method and device and electronic equipment |
| CN114915315A (en) * | 2022-06-20 | 2022-08-16 | Oppo广东移动通信有限公司 | Radio frequency system and control method thereof |
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