Electronic device, audio power amplifier chip, and device retrieval method

Abstract

Provided in the present application are an electronic device, an audio power amplifier chip, and a device retrieval method, which are used for reducing the power consumption of lost electronic devices during retrieval. The electronic device comprises the audio power amplifier chip, a short-distance communication module, and a loudspeaker; when the electronic device is in a shutdown state, the short-distance communication module can receive a first instruction from a second electronic device; and the audio power amplifier chip can output audio by means of the loudspeaker in response to the first instruction.

Description

Electronic device, audio power amplifier chip, and device retrieval method

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to the Chinese patent application filed with the State Intellectual Property Office of the People's Republic of China on September 26, 2023, with application number 202311254006.7 and invention name "An electronic device, audio amplifier chip and device retrieval method", the entire contents of which are incorporated by reference into this application. Technical Field

[0003] The embodiments of the present application relate to the technical field of electronic devices, and in particular to an electronic device, an audio power amplifier chip, and a device retrieval method. Background Art

[0004] With the development of electronic device technology, electronic devices have become increasingly versatile and their usage scenarios are becoming increasingly diverse. Users often use their electronic devices anytime and anywhere. However, in some special scenarios, users may lose their electronic devices. For example, a user may leave their electronic device somewhere, or their electronic device may be stolen by a thief. Therefore, it is necessary to provide corresponding retrieval functions for electronic devices so that users can retrieve their electronic devices in a timely manner to ensure the safety of their property and information.

[0005] In some technical solutions, the geographical range of the lost electronic device can be determined by using the positioning and searching function of the electronic device. However, the positioning and searching function cannot be used when the lost electronic device is in a powered-off state.

[0006] Therefore, how to retrieve a lost electronic device when the lost electronic device is in a powered-off state is a problem that needs to be solved urgently in this field.

[0007] Summary of the Invention

[0008] The present application provides an electronic device, an audio power amplifier chip, and a device recovery method, for reducing the power consumption of a lost electronic device during the recovery process.

[0009] In a first aspect, an embodiment of the present application provides an electronic device, which includes an audio amplifier chip, a short-range communication module, and a speaker; wherein the short-range communication module is used to receive a first instruction from a second electronic device when the electronic device is in a shutdown state; the audio amplifier chip is used to output audio through the speaker in response to the first instruction.

[0010] The second device may be understood as another device used by the user to assist the user in finding the electronic device.

[0011] The embodiment of the present application provides that when the electronic device is in the off state, the audio power amplifier chip in the electronic device can directly respond to the ringing instruction (i.e., the first instruction) received by the short-range communication module to output audio through the speaker in the electronic device. In this way, compared with the technical solution in which the system on chip (SOC) and / or codec (Coder decoder, Codec) in the electronic device responds to the ringing instruction received by the short-range communication module to control the audio power amplifier chip to output audio through the speaker when the electronic device is in the off state, the embodiment of the present application does not need to power the SOC and / or Codec, which can effectively reduce the power consumption of the electronic device during the retrieval process. In addition, since the electronic device needs to power fewer modules when it is in the off state, the battery life of the electronic device in the off state is longer, which can increase the probability of the lost electronic device being successfully retrieved.

[0012] In one possible design, the short-range communication module is further configured to, after receiving the first instruction, send a second instruction to the audio amplifier chip, which is configured to activate the audio amplifier chip. In this design, the audio amplifier chip is powered off before the short-range communication module receives the first instruction. After receiving the first instruction, the short-range communication module triggers the audio amplifier chip to power on. This can further reduce the power consumption of the electronic device when it is powered off, increase the battery life of the electronic device when powered off, and further increase the probability of successfully recovering the lost electronic device.

[0013] In one possible design, the electronic device further includes a battery, which is used to power the audio amplifier chip and / or the short-range communication module when the electronic device is powered off. In this design, when the electronic device is powered off, the battery powers the audio amplifier chip and the short-range communication module, allowing them to continue operating and effectively ensuring that the electronic device rings.

[0014] In one possible design, the electronic device further includes a power switch, which is used to control the battery to power the audio amplifier chip and the short-range communication module when the electronic device is powered off. In this design, the power switch controls the battery to power the audio amplifier chip and the short-range communication module.

[0015] In one possible design, the electronic device also includes a power monitoring module, which is used to power the audio amplifier chip and the short-range communication module when the electronic device is powered off. In this design, the electronic device is equipped with a power monitoring module. While the power monitoring module is powering the audio amplifier chip and the short-range communication module, it can monitor the power supply status in real time, helping to improve the reliability, safety, and performance of the electronic device.

[0016] In one possible design, when the electronic device is in the off state, if the short-range communication module does not receive the first instruction within a preset time period, the short-range communication module is powered off. The preset time period can be, for example, 5 minutes, 10 minutes, etc. In this design, when the electronic device is in the off state, if the short-range communication module does not receive the first instruction within the preset time period, the short-range communication module is powered off. This can further reduce the power consumption of the electronic device in the off state and increase the battery life of the electronic device in the off state, further increasing the probability of successfully recovering the lost electronic device.

[0017] In one possible design, when the electronic device is powered off, the short-range communication module is powered on during a preset period and powered off outside of that period. This design, by periodically powering off the short-range communication module, can further reduce the power consumption of the electronic device when powered off and increase its battery life, further increasing the probability of successfully recovering the lost electronic device.

[0018] In one possible design, when the electronic device is in the off state, the short-range communication module is operated by a low-power core in the electronic device. In this design, running the short-range communication module by the low-power core can further reduce the power consumption of the electronic device in the off state.

[0019] In one possible design, the electronic device further includes a positioning module configured to, in response to a first instruction, obtain location information of the electronic device and upload the location information to a server. In this design, when the electronic device is powered off, the positioning module in the electronic device is powered on. The positioning module obtains the location information of the electronic device in response to the first instruction and uploads the location information to the server. This allows for precise positioning of the electronic device, thereby further improving the success rate of recovering the electronic device.

[0020] In one possible design, the short-range communication module is further configured to send a third instruction to the positioning module after receiving the first instruction, and the third instruction is configured to activate the positioning module. In this design, the positioning module is powered off before the short-range communication module receives the first instruction. After receiving the first instruction, the short-range communication module triggers the positioning module to power on, thereby further reducing power consumption when the electronic device is powered off.

[0021] In a second aspect, an embodiment of the present application provides an audio power amplifier chip, which includes a waveform generator, a digital processor, a pulse width modulation waveform generator, and a power amplifier; wherein the waveform generator is used to generate an audio waveform signal; the digital processor is used to convert the audio waveform signal into an audio digital signal; the pulse width modulation waveform generator is used to modulate the audio digital signal to obtain an audio pulse signal; and the power amplifier is used to power amplify the audio pulse signal to obtain an audio analog signal.

[0022] In the embodiments of the present application, by providing a waveform generator in the audio amplifier chip, the audio amplifier chip can generate an audio waveform signal and output the corresponding audio, thereby eliminating the need for the audio amplifier chip to receive the audio waveform signal from other control chips. For example, when the audio amplifier chip is deployed in an electronic device, even when the electronic device is turned off and other control chips are powered off, the audio amplifier chip can still output audio signals through the speaker in the electronic device.

[0023] In one possible design, the audio amplifier chip further includes an I / O interface, and the waveform generator receives a first instruction via the I / O interface; the waveform generator generates an audio waveform signal, including: the waveform generator generates the audio waveform signal in response to the first instruction. In this design, by providing an I / O interface in the audio amplifier chip, when the audio amplifier chip is deployed in an electronic device, the waveform generator can receive the first instruction from other modules in the electronic device via the I / O interface, thereby enabling the audio amplifier chip to directly drive the speaker in the electronic device to ring.

[0024] In one possible design, the waveform generator is disposed between the I / O interface and the digital processor, or the waveform generator is disposed within the digital processor. In this design, multiple arrangements of the waveform generator are provided, allowing the audio power amplifier chip provided in the embodiments of the present application to be flexibly implemented.

[0025] In one possible design, the audio amplifier chip also includes a phase-locked loop (PLL) and an oscillator. The oscillator is used to provide a clock signal to the PLL, which is used to synchronize the clocks of various components in the audio amplifier chip. In this design, by providing an oscillator in the audio amplifier chip, when the audio amplifier chip is deployed in an electronic device, the PLL can synchronize the clocks of various components in the audio amplifier chip based on the corresponding clock signal, even when the electronic device is turned off, thereby allowing the speaker to ring normally.

[0026] In a third aspect, an embodiment of the present application provides a device retrieval method, which can be applied to an electronic device, wherein the electronic device includes an audio amplifier chip, a short-range communication module, and a speaker; the method includes: when the electronic device is in a powered-off state, receiving a first instruction from a second electronic device through the short-range communication module; the audio amplifier chip responds to the first instruction and outputs audio through the speaker.

[0027] In this method, when the electronic device is in the off state, the audio power amplifier chip can directly drive the speaker to ring. If the electronic device is lost and the electronic device is in the off state, the user can find the electronic device in time based on the audio signal output by the speaker. In addition, since the audio power amplifier chip can directly drive the speaker to ring, when the electronic device is in the off state, the power supply module in the electronic device does not need to power other modules in the electronic device (such as the SOC), which can effectively reduce the power consumption of the electronic device during the retrieval process.

[0028] In one possible design, the method further includes: after receiving the first instruction, the short-range communication module sends a second instruction to the audio power amplifier chip, where the second instruction is used to start the audio power amplifier chip.

[0029] In one possible design, the electronic device further includes a battery, and the method further includes: when the electronic device is in a powered-off state, powering the audio power amplifier chip and / or the short-range communication module via the battery.

[0030] In one possible design, the electronic device further includes a power switch, and the method further includes: when the electronic device is in a shutdown state, controlling the battery through the power switch to power the audio amplifier chip and the short-range communication module.

[0031] In one possible design, the electronic device further includes a power monitoring module, and the method further includes: when the electronic device is in a shutdown state, supplying power to the audio amplifier chip and the short-range communication module through the power monitoring module.

[0032] In one possible design, the method further includes: when the electronic device is in a shutdown state, the short-range communication module does not receive the first instruction within a preset time period, and the short-range communication module is in a power-off state.

[0033] In one possible design, the method further includes: the short-range communication module is in a power-on state within a preset period, and the short-range communication module is in a power-off state outside the preset period.

[0034] In one possible design, when the electronic device is in a shutdown state, the short-range communication module is run by a low-power core in the electronic device.

[0035] In one possible design, the electronic device further includes a positioning module, and the method further includes: the positioning module obtains location information of the electronic device in response to the first instruction, and uploads the location information to the server.

[0036] In one possible design, the method further includes: after receiving the first instruction, the short-range communication module sends a third instruction to the positioning module, where the third instruction is used to start the positioning module.

[0037] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium, which includes a computer program. When the computer program runs on an electronic device, the electronic device executes the method described in the first aspect and any possible implementation of the first aspect.

[0038] In a fifth aspect, an embodiment of the present application further provides a device comprising modules / units for executing any one of the possible design methods of any of the above aspects. These modules / units may be implemented by hardware, or by hardware executing corresponding software implementations.

[0039] In a sixth aspect, an embodiment of the present application further provides a method comprising a computer program product, which, when executed on a terminal, enables the electronic device to execute any one of the possible implementation methods described in any of the above aspects.

[0040] For the beneficial effects of the third and fourth aspects, please refer to the relevant description in the first aspect, which will not be repeated here. These and other aspects of the embodiments of the present application will be more concise and easy to understand in the description of the following embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] FIG1A shows a schematic diagram of a scenario according to an embodiment of the present application;

[0042] FIG1B shows a schematic structural diagram of an electronic device A according to an embodiment of the present application;

[0043] FIG1C shows a schematic structural diagram of a SmartPA chip in an embodiment of the present application;

[0044] FIG2 shows a schematic diagram of a scenario in an embodiment of the present application;

[0045] FIG3A shows one of the structural diagrams of the electronic device 100 provided in an embodiment of the present application;

[0046] FIG3B shows a second structural diagram of the electronic device 100 provided in an embodiment of the present application;

[0047] FIG3C shows a third structural diagram of the electronic device 100 provided in an embodiment of the present application;

[0048] FIG3D shows a fourth structural diagram of the electronic device 100 provided in an embodiment of the present application;

[0049] FIG4A shows one structural diagram of the audio power amplifier chip 102 provided in an embodiment of the present application;

[0050] FIG4B shows a second structural diagram of the audio power amplifier chip 102 provided in an embodiment of the present application;

[0051] FIG5 is a schematic diagram showing a flow chart of a device retrieval method provided in an embodiment of the present application;

[0052] FIG6 shows a fifth structural diagram of the electronic device 100 provided in an embodiment of the present application;

[0053] FIG7 shows a schematic structural diagram of another electronic device. DETAILED DESCRIPTION

[0054] In the various embodiments of the present application, unless otherwise specified or provided for by logic, the terms and / or descriptions between the various embodiments are consistent and can be referenced by each other. The technical features in different embodiments can be combined to form new embodiments according to their inherent logical relationships.

[0055] In the embodiments of the present application, "at least one" refers to one or more, and "more" refers to two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: the existence of A alone, the existence of A and B at the same time, and the existence of B alone, where A and B can be singular or plural. The character " / " generally indicates that the previous and next associated objects are in an "or" relationship. "At least one of the following items" or similar expressions refers to any combination of these items, including any combination of single items or plural items. For example, at least one of a, b, or c can represent: a, b, c, a and b, a and c, b and c, or a and b and c, where a, b, c can be single or multiple.

[0056] Also, unless otherwise specified, ordinal numbers such as "first" and "second" mentioned in the embodiments of the present application are used to distinguish multiple objects and are not used to limit the priority or importance of multiple objects.

[0057] As shown in Figure 1A, electronic device A is the electronic device lost by the user, and electronic device B is a device used by the user to assist in finding electronic device A. A communication connection can be established between electronic devices A and B. Therefore, when electronic device A is lost, the finder can send a ringing instruction to electronic device A through electronic device B. The ringing instruction includes instruction information 1, which is used to instruct certain modules (such as a codec (coder decoder, Codec), SOC, etc.) in electronic device A to start, thereby triggering electronic device A to ring. The finder can then find electronic device A based on the direction of the ringing of electronic device A.

[0058] FIG1B shows a schematic diagram of the structure of electronic device A, which includes a SOC, a communication module, a Codec, a smart power amplifier (SmartPA) chip, a power management unit (PMU), a battery, and a speaker. The communication module may be a wifi module or a cellular module. When the electronic device is in the off state, the PMU may power the SOC, the communication module, the Codec, and the SmartPA chip, so that when the electronic device A is in the off state, the communication module may establish a communication connection with the electronic device B, and the communication module may receive a ringing instruction from the electronic device B and transmit the ringing instruction to the SOC; the SOC sends a ringing control signal to the Codec, and the Codec generates an audio waveform signal in response to the ringing control signal and sends the audio waveform signal to the SmartPA chip. The SmartPA chip performs a series of processing on the audio waveform signal and outputs the processed audio signal through the speaker.

[0059] Figure 1C shows a schematic structural diagram of a SmartPA chip, which includes inter-integrated circuit sound (I2S), time division multiplexing (TDM), inter integrated circuit bus (I2C), digital process (DP), active detection, gain control, pulse-width modulation generator (PWM Generator), power amplifier, phase locked loop (PLL), current sensor, voltage sensor, and address module (ADDR).

[0060] Among them, I2S and I2C can be connected to the SOC in electronic device A, and then the SOC can transmit signals with the SmartPA chip through I2S. For example, the SOC can input the audio waveform signal, clock signal and synchronization signal into the SmartPA chip through I2S, so that the SmartPA chip can receive and process the audio waveform signal and output the processed audio signal through the speaker. In addition, I2C can be used to achieve communication and control between the SmartPA chip and the SOC. Alternatively, I2S and I2C can be connected to the Codec in electronic device A, and then the Codec can transmit signals with the SmartPA chip through I2S. For example, the Codec can input the audio waveform signal, clock signal and synchronization signal into the SmartPA chip through I2S, so that the SmartPA chip can receive and process the audio waveform signal and output the processed audio signal through the speaker. In addition, I2C can be used to achieve communication and control between the SmartPA chip and the Codec.

[0061] PLL can realize functions such as frequency synthesis, clock cleaning, stabilization and timing adjustment, thereby providing a stable and accurate clock signal to meet the needs of SmartPA chip for high-quality audio processing and timing requirements.

[0062] The current sensor is used to monitor the current level in the SmartPA chip. When the current exceeds the set threshold, it can trigger the overload protection mechanism to prevent the current from damaging the circuit or equipment. The current sensor can also detect abnormal current behavior in the circuit, such as short circuit or open circuit, which helps the SmartPA chip to detect faults in time and take necessary measures.

[0063] Voltage sensors are used in smartPA chips to measure and monitor voltage, supporting functions such as overload protection, energy consumption monitoring, fault detection, power supply monitoring, current measurement, as well as early warning and protection, to achieve reliability, safety and energy saving of SmartPA chips.

[0064] ADDR is used to identify and select modules inside the chip or external devices. ADDR assigns and manages unique addresses or identifiers inside the chip or external devices. These addresses can be fixed hardware addresses or programmable software addresses.

[0065] The SmartPA chip performs a series of processing on the audio waveform signal input by the Codec or SOC, including: DP converts the audio waveform signal into an audio digital signal. Furthermore, the activity detection module can analyze the intensity of the audio digital signal processed by DP and adjust the gain level based on real-time monitoring results. And, the gain control module adjusts the amplification factor or attenuation of the audio digital signal to meet different output requirements. After the gain control module adjusts the audio digital signal, the pulse width modulation (PWM) waveform generator can convert the audio digital signal into an audio pulse signal and input the audio pulse signal into the power amplifier. The power amplifier module performs a series of filtering and reconstruction on the audio pulse signal to re-form an analog signal corresponding to the original audio signal, and then the analog signal is output through the speaker of electronic device A.

[0066] Furthermore, the SmartPA chip also includes a digital voltage drain (DVDD), a battery voltage (VBAT), a power-on reset (POR), a reference voltage (VREF), and a boost circuit (Boost). DVDD is used to power the digital circuitry within the SmartPA chip, providing the required power supply voltage and current to ensure proper operation. VBAT is the battery voltage input for the SmartPA chip. In battery-powered applications, VBAT provides the required power supply voltage for the SmartPA chip, supporting connectivity with external battery systems and related power management functions. The POR is a key function of the SmartPA chip, ensuring the system is in a controllable initial state upon power-up. The POR circuit detects the rising edge of the SmartPA chip's power supply and generates a reset signal to initialize each module within the chip to a defined state. VREF provides a stable reference voltage, used within the SmartPA chip for reference and comparison with other voltages or signals.

[0067] However, when electronic device A is powered off, the short-range communication module, SOC, and Codec in electronic device A are all powered off. At this point, the short-range communication module cannot receive the ringing command from electronic device B, and the SOC cannot control the Codec to drive the SmartPA chip to ring the speaker of electronic device A. Therefore, current electronic devices do not support ringing when powered off, making it impossible to recover them if they are lost.

[0068] In view of this, the present application provides an electronic device, an audio power amplifier chip, and a device recovery method, so as to reduce the power consumption of a lost electronic device during the recovery process.

[0069] The following is a detailed description with reference to the accompanying drawings and embodiments.

[0070] FIG2 shows an application scenario of an embodiment of the present application, which includes an electronic device 100 and a second electronic device 200. The electronic device 100 is a device lost by a user, and the second electronic device 200 is an electronic device used to assist in finding the electronic device 100.

[0071] In one case, the electronic device 100 and the second electronic device 200 can be devices associated with the same user identifier, for example, they can be devices bound to the same user account. Since the device identifiers of all devices associated with the same user identifier are stored in the cloud, the second electronic device 200 can obtain the device identifier of the electronic device 100 from the cloud using the user account. When the second electronic device 200 enables the Bluetooth device search process, if the device identifier of the electronic device 100 is searched, it can establish a Bluetooth connection with the electronic device 100. Then, when the electronic device 100 is lost and the electronic device 100 is in the off state, the second electronic device 200 can send a first instruction to the electronic device 100, and the first instruction can trigger the audio amplifier chip in the electronic device 100 to drive the speaker in the electronic device 100 to emit a ringtone, and then the user can find the electronic device 100 based on the ringtone.

[0072] In the embodiment of the present application, the electronic device 100 can be, for example, any one of a mobile phone, a smart watch, a tablet computer, an alarm clock, etc., and the embodiment of the present application does not impose any specific limitation.

[0073] For example, when the electronic device 100 is a mobile phone, if the mobile phone is lost and turned off, the short-range communication module 101 in the mobile phone can still receive the first instruction from the second electronic device 200, and then the audio amplifier chip 102 in the mobile phone can respond to the first instruction and output audio through the speaker 104. In this way, the user can find the mobile phone based on the audio output by the speaker 104.

[0074] For another example, when the electronic device 100 is an alarm clock, even when the alarm clock is turned off, the audio amplifier chip 102 in the alarm clock can still be powered on, and then the audio amplifier chip 102 can drive the alarm clock speaker 104 to output audio according to the alarm time set by the user. In this way, the user can receive the alarm ringtone reminder on time, thereby effectively improving the user's experience of using the alarm clock.

[0075] FIG3A is a schematic diagram of the structure of the electronic device 100. As shown in FIG3A, the electronic device 100 may include a short-range communication module 101, an audio power amplifier chip 102, a battery 103, and a speaker 104.

[0076] The following is a detailed introduction to each module in the electronic device 100.

[0077] 1) Short-range communication module 101

[0078] The short-range communication module 101 can be any one of a Bluetooth low energy (BLE) module, a Greentooth communication module, a Zigbee module, a radio frequency identification (RFID) module, a near field communication (NFC) module, or a Wi-Fi module, and is not limited in the embodiments of the present application.

[0079] When the electronic device 100 is in the off state, the short-range communication module 101 can be in the powered-on state, and then the electronic device 100 can establish a communication connection with the second electronic device 200 through the short-range communication module 101. In this way, even when the electronic device 100 is in the off state, the short-range communication module 101 and the second electronic device 200 can exchange information.

[0080] In one scenario, when the electronic device 100 is powered off, if the short-range communication module 101 does not receive the first instruction within a preset time period, the short-range communication module 101 may be powered off. The preset time period may be, for example, 5 minutes, 10 minutes, etc. This can further reduce the power consumption of the electronic device 100 when powered off, increase the battery life of the electronic device 100 when powered off, and further increase the probability of successfully finding the lost electronic device 100.

[0081] In another scenario, when the electronic device 100 is powered off, the short-range communication module 101 is powered on within a preset period, and powered off outside of the preset period. The preset period may be, for example, 5 minutes, 10 minutes, 15 minutes, etc. In this way, by periodically controlling the short-range communication module 101 to be powered off, the power consumption of the electronic device in the powered-off state can be further reduced, and the battery life of the electronic device 100 in the powered-off state can be increased, further increasing the probability of successfully finding the lost electronic device 100.

[0082] Optionally, when the electronic device 100 is in a shutdown state, the electronic device 100 can operate the short-range communication module 101 through a low-power core. In this way, the power consumption of the electronic device 100 during the retrieval process can be further reduced.

[0083] 2) Battery 103

[0084] The battery 103 is used to supply power to various modules in the electronic device 100 .

[0085] When the electronic device 100 is in the power-on state, the battery 103 can supply power to all modules in the electronic device 100 .

[0086] When the electronic device 100 is in the off state, the battery 103 can power some modules in the electronic device 100. For example, when the electronic device 100 is in the off state, the battery 103 can power the short-range communication module 101 and / or the audio amplifier chip 102.

[0087] The battery 103 may directly power the short-range communication module 101 and / or the audio power amplifier chip 102 , or the battery 103 may indirectly power the short-range communication module 101 and / or the audio power amplifier chip 102 .

[0088] As shown in FIG3B , the electronic device 100 may further include a power switch 105. When the electronic device 100 is in the off state, the power switch 105 may control the battery 103 to supply power to the short-range communication module 101 and / or the audio amplifier chip 102. That is, under the control of the power switch 105, the battery 103 directly supplies power to the short-range communication module 101 and / or the audio amplifier chip 102.

[0089] As shown in FIG3C , the electronic device 100 may further include a PMU 106. When the electronic device 100 is powered off, the battery 103 can power the PMU 106, which in turn powers the short-range communication module 101 and / or the audio amplifier chip 102. In other words, the battery 103 indirectly powers the audio amplifier chip 102 and the short-range communication module 101 through the PMU 106. Furthermore, while the PMU 106 is powering the audio amplifier chip 102 and the short-range communication module 101, it can monitor the power status in real time, thereby improving the reliability, safety, and performance of the electronic device 100.

[0090] As shown in Figure 3D, the electronic device 100 may further include a processor 107. The processor 107 may be a SOC, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA), other programmable logic devices, transistor logic devices, or any combination thereof. The general-purpose processor may be a microprocessor, such as a microcontroller unit (MCU), or may be other conventional processors. When the electronic device 100 is in the shutdown state, the processor 107 may not work, that is, the processor 107 is in the power-off state. In this way, the power consumption of the electronic device 100 can be effectively reduced.

[0091] 3) Audio power amplifier chip 102.

[0092] As shown in FIG4A , the audio power amplifier chip 102 may include a waveform generator 1021, a digital processor 1022, a pulse width modulation waveform generator 1023, and a power amplifier 1024. The waveform generator 1021 may be deployed before the digital processor 1022 (as shown in FIG4A ). Alternatively, in other possible embodiments, the waveform generator 1021 and the digital processor 1022 may be integrated into a single module.

[0093] Waveform generator 1021 is used to generate waveform signals of specific shapes and frequencies, depending on the application scenario and design requirements. For example, in the case of a SmartPA audio amplifier chip, waveform generator 1021 has the following functions: Signal Generation: Waveform generator 1021 can generate different types of signals, such as sine waves, square waves, and triangle waves. These signals can be used in various audio processing and testing applications, such as audio signal generation and frequency response testing. Frequency Adjustment: By adjusting the parameters of waveform generator 1021 (such as frequency and period), the output signal frequency can be precisely controlled, which is very useful for audio system debugging and frequency response calibration. Audio Simulation: Waveform generator 1021 can simulate various audio effects, such as reverberation, chorus, and echo, by generating waveform signals with specific shapes and delays. This helps enhance the audio experience and sound processing. Reference Signal Provision: In some applications, waveform generator 1021 can also provide reference signals (such as clock signals and synchronization signals) to facilitate coordination and data synchronization between various components in audio amplifier chip 102.

[0094] Digital processor 1022 is a microprocessor specifically designed for digital signal processing. It has the ability to efficiently process digital signals and typically has a dedicated instruction set and hardware accelerators to optimize the execution of digital signal processing algorithms. Digital processor 1022 is implemented through a combination of components such as a core, memory, a digital signal processing unit, and input / output interfaces. In the embodiment of the present application, digital processor 1022 can convert and process audio signals and execute various audio processing algorithms, such as equalizer, noise reduction, and reverberation, to improve audio quality.

[0095] The pulse width modulation waveform generator 1023 may be an electronic device or circuit for generating a PWM signal with an adjustable pulse width. Specific implementations of the pulse width modulation waveform generator 1023 may include, but are not limited to, the following:

[0096] Method 1: Using a comparator: One or more comparators compare the input signal with an adjustable reference signal. The output waveform of the comparator or comparators is regulated and filtered to produce a PWM signal.

[0097] Method 2: Implemented through a timer / counter: Use a timer or counter to generate a clock signal with a fixed frequency, and then adjust the pulse width of the waveform signal by setting the counting period and duty cycle.

[0098] Method 3: Implemented via Pulse Width Modulation Chip: Use a dedicated PWM chip or integrated circuit. These chips typically contain comparators, counters, and control logic, and can adjust the PWM waveform parameters through configuration registers or external inputs.

[0099] Method 4: Implemented via a microcontroller: Use a microcontroller or single-chip microcomputer with PWM output function. These microcontrollers usually have an integrated PWM module, which can generate PWM signals by programming parameters.

[0100] The power amplifier 1024 may be any one of a class A power amplifier, a class B power amplifier, a class AB power amplifier, or a class D power amplifier. This embodiment of the present application does not impose any specific limitation.

[0101] As shown in Figure 4A, the waveform generator 1021 can generate an audio waveform signal and input the audio waveform signal into the digital processor 1022; the digital processor 1022 can convert the audio waveform signal into an audio digital signal, and input the audio digital signal into the pulse width modulation waveform generator 1023; the pulse width modulation waveform generator 1023 modulates the audio digital signal to obtain an audio pulse signal; the power amplifier 1024 can amplify the audio pulse signal to obtain an audio analog signal, and drive the speaker 104 of the electronic device 100 to output the audio analog signal.

[0102] In the embodiment of the present application, the audio path used to retrieve the electronic device 100 when the electronic device 100 is in the power-on state is different from the audio path used to retrieve the electronic device 100 when the electronic device 100 is in the power-off state.

[0103] Continuing with FIG4A , the audio path used when the electronic device 100 is in the off state is the audio path corresponding to the dotted line in pattern 1 in FIG4A . Specifically, in this audio path, when the electronic device 100 is in the off state, the waveform generator 1021 can receive a first instruction from the short-range communication module 101 in the electronic device 100 and, in response to the first instruction, generate an audio waveform signal and input the audio waveform signal into the digital processor 1022 ; the digital processor 1022 can convert the audio waveform signal into an audio digital signal and input the audio digital signal into the pulse width modulation waveform generator 1023 ; the pulse width modulation waveform generator 1023 can modulate the audio digital signal to obtain an audio pulse signal; the power amplifier 1024 can amplify the audio pulse signal to obtain an audio analog signal and drive the speaker 104 of the electronic device 100 to output the audio analog signal.

[0104] Furthermore, the audio path used when the electronic device 100 is powered on is the audio path corresponding to the dotted line of pattern 2 in FIG. 4A Specifically, in this audio path, when the electronic device 100 is powered on, the processor 107 in the electronic device 100 can generate an audio waveform signal and input the audio waveform signal into the digital processor 1022 ; the digital processor 1022 can convert the audio waveform signal into an audio digital signal and input the audio digital signal into the pulse width modulation waveform generator 1023 ; the pulse width modulation waveform generator 1023 can modulate the audio digital signal to obtain an audio pulse signal; the power amplifier 1024 can amplify the audio pulse signal to obtain an audio analog signal, and drive the speaker 104 of the electronic device 100 to output the audio analog signal.

[0105] FIG4B further illustrates a more detailed structural diagram of the audio power amplifier chip 102. As shown in FIG4B , the audio power amplifier chip 102 may further include an I / O interface, an active detection module, and a gain control module. The I / O interface is connected to the waveform generator 1021, which can then receive instructions from other modules in the electronic device 100 via the I / O interface. Accordingly, the audio path used when the electronic device 100 is in the off state may be the audio path corresponding to the dotted line in pattern 1 in FIG4B . In this audio path, when the electronic device 100 is in the off state, the waveform generator 1021 can receive a first instruction from the short-range communication module 101 via the I / O interface. In response to the first instruction, the waveform generator 1021 generates an audio waveform signal and inputs the audio waveform signal into the digital processor 1022. The digital processor 1022 can convert the audio waveform signal into a digital audio signal and input the digital audio signal into the activity detection module. The activity detection module can analyze the strength of the digital audio signal and adjust the gain level based on the real-time monitoring results. Furthermore, the gain control module adjusts the amplification factor or attenuation of the digital audio signal to accommodate different output requirements. After adjusting the digital audio signal, the gain control module inputs the adjusted digital audio signal into the pulse width modulation waveform generator 1023. The pulse width modulation waveform generator 1023 modulates the digital audio signal to generate an audio pulse signal. The power amplifier 1024 amplifies the audio pulse signal to generate an analog audio signal, which then drives the speaker 104 of the electronic device 100 to output the analog audio signal.

[0106] The audio path used when the electronic device 100 is powered on can also be the audio path corresponding to the dotted line of pattern 2 in FIG. 4B . In this audio path, when the electronic device 100 is powered on, upon receiving a first instruction from the short-range communication module 101, the processor 107 can generate an audio waveform signal in response to the first instruction and input the audio waveform signal to the digital processor 1022 via I2S. The digital processor 1022 can convert the audio waveform signal into a digital audio signal and input the digital audio signal to the activity detection module. The activity detection module can analyze the strength of the digital audio signal and adjust the gain level based on real-time monitoring results. Furthermore, the gain control module can adjust the amplification factor or attenuation of the digital audio signal to meet different output requirements. After the gain control module adjusts the audio digital signal, the adjusted audio digital signal is input into the pulse width modulation waveform generator 1023; the pulse width modulation waveform generator 1023 modulates the audio digital signal to obtain an audio pulse signal; the power amplifier 1024 can amplify the audio pulse signal to obtain an audio analog signal, and drive the speaker 104 of the electronic device 100 to output the audio analog signal.

[0107] Continuing with FIG4B , the audio amplifier chip 102 may further include a PLL 1025 and an oscillator (OSC) 1026. The oscillator 1026 may provide a clock signal to the PLL 1025 when the electronic device 100 is in the off state. This clock signal is used to synchronize the clocks of the various components in the audio amplifier chip 102. This allows the PLL 1025 to synchronize the clocks of the various components in the audio amplifier chip 102 based on the corresponding clock signal when the electronic device 100 is in the off state, thereby enabling the audio amplifier chip 102 to drive the speaker 104 to ring. Furthermore, when the PLL 1025 uses the OSC 1026 as a reference signal source, it may also adjust the frequency or phase of the OSC 1026 through a feedback mechanism to generate a stable and accurate output clock signal. In this way, the synergistic effect of the PLL 1025 and the OSC 1026 enables the audio power amplifier chip 102 to obtain a high-quality clock signal, thereby realizing functions such as audio processing, timing control, and data synchronization.

[0108] Furthermore, the audio amplifier chip 102 also includes a digital voltage drain (DVDD), a battery voltage (VBAT), a power-on reset (POR), a reference voltage (VREF), and a boost circuit (Boost). DVDD is used to power the digital circuitry within the audio amplifier chip 102, providing the required power supply voltage and current to ensure proper operation. VBAT is the battery voltage input for the audio amplifier chip 102. In battery-powered applications, VBAT provides the required power supply voltage for the audio amplifier chip 102, supporting connectivity with external battery systems and related power management functions. The POR is a key function of the audio amplifier chip 102, ensuring the system is in a controllable initial state upon power-up. The POR circuit detects the rising edge of the power supply to the audio amplifier chip 102 and generates a reset signal to initialize each module within the chip to a defined state. VREF provides a stable reference voltage, used within the audio amplifier chip 102 for reference and comparison with other voltages or signals.

[0109] In an embodiment of the present application, when the electronic device 100 is in the off state, DVDD can supply power to the POR and provide the voltage required by VREF. VBAT can provide the power supply voltage for the audio power amplifier chip 102 upon receiving a power-on signal from the battery 103; alternatively, VBAT can provide the power supply voltage for the audio power amplifier chip 102 upon receiving a power-on signal from the power switch 105; alternatively, VBAT can provide the power supply voltage for the audio power amplifier chip 102 upon receiving a power-on signal from the PMU 106.

[0110] 4) Speaker 104

[0111] The speaker 104 may be, for example, a dynamic speaker, a diaphragm speaker, an array speaker, or any combination thereof. For another example, the speaker 104 may be a horn.

[0112] Based on the above electronic device 100 and audio power amplifier chip 102, an embodiment of the present application provides a device retrieval method, which can be applied to the electronic device 100. Referring to FIG5 , the method includes:

[0113] S501: When the electronic device 100 is in a power-off state, the short-range communication module 101 receives a first instruction from the second electronic device 200. The first instruction is used to instruct the audio amplifier chip 102 to output audio through a speaker.

[0114] S502 : The audio amplifier chip 102 outputs audio through the speaker 104 in response to the first instruction.

[0115] In one case, the waveform generator 1021 is deployed outside the digital processor 1022, and the process of the audio amplifier chip 102 responding to the first instruction to output audio through the speaker 104 may include: the waveform generator 1021 generates an audio waveform signal in response to the first instruction, and inputs the audio waveform signal into the digital processor 1022; the digital processor 1022 can convert the audio waveform signal into an audio digital signal, and input the audio digital signal into the pulse width modulation waveform generator 1023; the pulse width modulation waveform generator 1023 modulates the audio digital signal to obtain an audio pulse signal; the power amplifier 1024 can power amplify the audio pulse signal to obtain an audio analog signal, and drive the analog signal of the audio of the speaker 104 of the electronic device 100.

[0116] In another case, the waveform generator 1021 is deployed in the digital processor 1022, and the process of the audio amplifier chip 102 responding to the first instruction and outputting audio through the speaker 104 may include: the waveform generator 1021 in the digital processor 1022 responds to the first instruction to generate an audio waveform signal, the DSP module in the digital processor 1022 converts the audio waveform signal into an audio digital signal, and inputs the audio digital signal into the pulse width modulation waveform generator 1023; the pulse width modulation waveform generator 1023 modulates the audio digital signal to obtain an audio pulse signal; the power amplifier 1024 can power amplify the audio pulse signal to obtain an audio analog signal, and drive the analog signal of the audio of the speaker 104 of the electronic device 100.

[0117] In the method shown in S501-S502, when the electronic device 100 is lost, even if the electronic device 100 is in the off state, the user can find the electronic device 100 in time according to the audio signal output by the speaker 104, which effectively improves the probability of the electronic device 100 being successfully retrieved. In addition, compared with the technical solution described above in which the SOC or Codec in the electronic device 100 responds to the ringing instruction received by the short-range communication module to control the audio amplifier chip to output audio through the speaker when the electronic device 100 is in the off state, the embodiment of the present application does not need to power the SOC or Codec, which can effectively reduce the power consumption of the electronic device during the retrieval process. In addition, since the electronic device needs to power fewer modules when it is in the off state, the battery life of the electronic device in the off state is longer, which can further improve the probability of the electronic device 100 being successfully retrieved.

[0118] During the specific implementation of S502, the audio power amplifier chip 102 can control the speaker 104 to output audio at the maximum volume of the electronic device 100. This increases the probability that the user searching for the electronic device 100 can hear the audio, thereby increasing the probability of successfully recovering the electronic device 100. Furthermore, when the speaker 104 outputs audio at the maximum volume of the electronic device 100, even if the electronic device 100 detects the user adjusting the volume button, the speaker 104 can still output audio at the maximum volume, thereby effectively preventing the user who stole the electronic device 100 from lowering the audio volume.

[0119] The audio power amplifier chip 102 may be powered off before the short-range communication module 101 receives the first instruction. After the short-range communication module 101 receives the first instruction, the short-range communication module 101 triggers the audio power amplifier chip 102 to power on. This can further reduce the power consumption of the electronic device 100 when it is powered off, increase the battery life of the electronic device 100 when it is powered off, and further increase the probability of successfully finding the lost electronic device 100.

[0120] The short-range communication module 101 triggering the audio power amplifier chip 102 to power on includes but is not limited to the following situations:

[0121] In case 1, after receiving the first instruction, the short-range communication module 101 sends a second instruction to the audio amplifier chip 102, where the second instruction is used to start the audio amplifier chip 102. Accordingly, the audio amplifier chip 102 can self-start in response to the second instruction.

[0122] In case 2, after receiving the first instruction, the short-range communication module 101 sends a second instruction to the power switch 105. The second instruction is used to start the audio power amplifier chip 102. In response to the second instruction, the power switch 105 sends a power-on signal to the audio power amplifier chip 102. The audio power amplifier chip 102 receives the power-on signal and starts itself.

[0123] In case 3, after receiving the first instruction, the short-range communication module 101 sends a second instruction to the PMU 106, which is used to start the audio power amplifier chip 102. In response to the second instruction, the PMU 106 sends a power-on signal to the audio power amplifier chip 102; the audio power amplifier chip 102 receives the power-on signal and starts itself.

[0124] As shown in Figure 6, in a possible embodiment, the electronic device 100 may further include a positioning module 108, which may obtain the location information of the electronic device 100 in response to the above-mentioned first instruction and upload the location information to the server. Further, the server may send the location information of the electronic device 100 to the second electronic device 200. In this way, when the electronic device 100 is in the off state, the positioning module 108 can still obtain the location information of the electronic device 100, and can accurately locate the electronic device 100, thereby further improving the success rate of retrieving the electronic device 100. Among them, the positioning module 108 may be in a power-off state before the short-range communication module 101 receives the first instruction. After the short-range communication module 101 receives the first instruction, the short-range communication module 101 triggers the positioning module 108 to power on. Similarly, the short-range communication module 101 triggering the positioning module 108 to power on may include but is not limited to the following situations:

[0125] In case 1, after receiving the third instruction, the short-range communication module 101 sends a second instruction to the positioning module 108, where the second instruction is used to start the positioning module 108. Accordingly, the positioning module 108 can self-start in response to the second instruction.

[0126] In case 2, after receiving the third instruction, the short-range communication module 101 sends a second instruction to the power switch 105, which is used to start the positioning module 108. In response to the second instruction, the power switch 105 sends a power-on signal to the positioning module 108. The positioning module 108 receives the power-on signal and starts itself.

[0127] In case 3, after receiving the third instruction, short-range communication module 101 sends a second instruction to PMU 106, which is used to start positioning module 108. In response to the second instruction, PMU 106 sends a power-on signal to positioning module 108. Positioning module 108 automatically starts upon receiving the power-on signal.

[0128] Based on the same technical concept, an embodiment of the present application further provides another electronic device, as shown in FIG7 , the electronic device 700 may include at least one processor 710 and a communication interface 730. In an optional design, a memory 720 may also be included.

[0129] The embodiment of the present application does not limit the specific connection medium between the processor 710 and the memory 720. When the processor 710 communicates with other devices, it can transmit data through the communication interface 730.

[0130] The processor 710 in Figure 7 can enable the apparatus 700 to execute any of the above method embodiments by calling the computer-executable instructions stored in the memory 720. For specific implementations, please refer to the method steps implemented by the electronic device in the above method embodiments, which will not be repeated here.

[0131] In an embodiment of the present application, a processor is a circuit with a signal processing capability. In one implementation, the processor may be a circuit with instruction reading and execution capability, such as a CPU, a microprocessor, a graphics processing unit (GPU) (which can be understood as a microprocessor), or a digital signal processor (DSP); in another implementation, the processor may implement certain functions through the logical relationship of a hardware circuit, and the logical relationship of the hardware circuit is fixed or reconfigurable, such as a hardware circuit implemented by an ASIC or PLD, such as an FPGA. In a reconfigurable hardware circuit, the processor loads a configuration document and implements the process of hardware circuit configuration, which can be understood as the process of the processor loading instructions to implement the functions of some or all of the above units. In addition, it can also be a hardware circuit designed for artificial intelligence, which can be understood as an ASIC, such as a neural network processing unit (NPU), a tensor processing unit (TPU), a deep learning processing unit (DPU), etc.

[0132] An embodiment of the present application also relates to a chip system, which includes a processor for calling a computer program or computer instructions stored in a memory so that the processor executes the method of any of the above embodiments.

[0133] In a possible implementation, the processor may be coupled to the memory through an interface.

[0134] In a possible implementation, the chip system may also directly include a memory, in which a computer program or computer instructions are stored.

[0135] For example, the memory may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memories. The non-volatile memory may be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory may be a random access memory (RAM), which is used as an external cache memory. By way of example and not limitation, many forms of RAM are available, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate synchronous dynamic random access memory (DDR SDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous link dynamic random access memory (SLDRAM), and direct rambus RAM (DR RAM).

[0136] An embodiment of the present application further relates to a processor, which is used to call a computer program or computer instruction stored in a memory so that the processor executes the method described in any of the above embodiments.

[0137] For example, in the embodiments of the present application, the processor is an integrated circuit chip with signal processing capabilities. For example, the processor can be an FPGA, a general-purpose processor, a DSP, an ASIC or other programmable logic device, a discrete gate or transistor logic device, a discrete hardware component, a system on chip (SoC), a CPU, a network processor (NP), a microcontroller unit (MCU), a PLD or other integrated chip, and can implement or execute the various methods, steps and logic block diagrams disclosed in the embodiments of the present application. The general-purpose processor can be a microprocessor or the processor can also be any conventional processor. The steps of the method disclosed in the embodiments of the present application can be directly embodied as being executed by a hardware decoding processor, or can be executed by a combination of hardware and software modules in the decoding processor. The software module can be located in a storage medium mature in the art, such as random access memory, flash memory, read-only memory, programmable read-only memory or electrically erasable programmable memory, registers, etc. The storage medium is located in the memory, and the processor reads the information in the memory and completes the steps of the above method in combination with its hardware.

[0138] It should be understood that the embodiments of the present application may be provided as methods, systems, or computer program products.

[0139] In one possible implementation, an embodiment of the present application provides a computer-readable storage medium, which stores program code. When the program code runs on the computer, the computer executes the above method embodiment.

[0140] In a possible implementation, an embodiment of the present application provides a computer program product. When the computer program product is run on a computer, the computer is caused to execute the above method embodiment.

[0141] Those skilled in the art will appreciate that the embodiments of the present application can be provided as methods, systems, or computer program products. Therefore, the present application can adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application can adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to magnetic disk storage, CD-ROM, optical storage, etc.) that contain computer-usable program code.

[0142] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the present application. It should be understood that each flow and / or box in the flow chart and / or block diagram, as well as the combination of the flow chart and / or box in the flow chart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device produce a device for implementing the functions specified in one or more flow charts and / or one or more boxes in the block diagram.

[0143] These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce a product including an instruction device that implements the functions specified in one or more processes in the flowchart and / or one or more boxes in the block diagram.

[0144] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, so that the instructions executed on the computer or other programmable device provide steps for implementing the functions specified in one or more processes in the flowchart and / or one or more boxes in the block diagram.

[0145] Obviously, those skilled in the art may make various changes and modifications to this application without departing from the spirit and scope of this application. Thus, if these modifications and variations of this application fall within the scope of the claims of this application and their equivalents, this application is intended to include these modifications and variations.

Claims

1. An electronic device, characterized in that: Including audio power amplifier chip, short-distance communication module, and speaker; The short-range communication module is used to receive a first instruction from a second electronic device when the electronic device is in a powered-off state; The audio power amplifier chip is used to output audio through the speaker in response to the first instruction.

2. The electronic device according to claim 1, characterized in that: The short-range communication module is also used for: After receiving the first instruction, a second instruction is sent to the audio power amplifier chip, where the second instruction is used to start the audio power amplifier chip.

3. The electronic device according to claim 1 or 2, characterized in that: The electronic device also includes a battery; The battery is used to supply power to the audio power amplifier chip and / or the short-range communication module when the electronic device is in a powered-off state.

4. The electronic device according to claim 3, characterized in that: The electronic device further comprises a power switch; The power switch is used to control the battery to supply power to the audio power amplifier chip and the short-range communication module when the electronic device is turned off.

5. The electronic device according to any one of claims 1 to 4, characterized in that: The electronic device also includes a power monitoring module; The power monitoring module is used to supply power to the audio power amplifier chip and the short-range communication module when the electronic device is in a shutdown state.

6. The electronic device according to any one of claims 1 to 5, characterized in that: When the electronic device is in a power-off state, if the short-range communication module does not receive the first instruction within a preset time period, the short-range communication module is in a power-off state.

7. The electronic device according to any one of claims 1 to 5, characterized in that: When the electronic device is in a shutdown state, the short-range communication module is in a power-on state within a preset period, and the short-range communication module is in a power-off state outside the preset period.

8. The electronic device according to any one of claims 1 to 7, characterized in that: When the electronic device is in a shutdown state, the short-range communication module is operated by a low-power core in the electronic device.

9. The electronic device according to any one of claims 1 to 8, characterized in that: The electronic device further comprises a positioning module, wherein the positioning module is used for: In response to the first instruction, the location information of the electronic device is acquired, and the location information is uploaded to the server.

10. The electronic device according to claim 9, characterized in that: The short-range communication module is also used for: After receiving the first instruction, a third instruction is sent to the positioning module, where the third instruction is used to start the positioning module.

11. An audio power amplifier chip, characterized in that: The audio power amplifier chip includes a waveform generator, a digital processor, a pulse width modulation waveform generator, and a power amplifier, wherein: The waveform generator is used to generate an audio waveform signal; The digital processor is used to convert the audio waveform signal into the audio digital signal; The pulse width modulation waveform generator is used to modulate the digital signal of the audio to obtain the pulse signal of the audio; The power amplifier is used to amplify the power of the audio pulse signal to obtain the audio analog signal.

12. The audio power amplifier chip according to claim 11, characterized in that: The audio power amplifier chip also includes an I / O interface, and the waveform generator receives the first instruction through the I / O interface; The waveform generator generates an audio waveform signal, including: The waveform generator generates an audio waveform signal in response to the first instruction.

13. The audio power amplifier chip according to claim 12, characterized in that: The waveform generator is arranged between the I / O interface and the digital processor, or the waveform generator is arranged in the digital processor.

14. The audio power amplifier chip according to claim 12 or 13, characterized in that: The audio power amplifier chip also includes a phase-locked loop and an oscillator; The oscillator is used to provide a clock signal for the phase-locked loop, and the clock signal is used to achieve clock synchronization of various components in the audio power amplifier chip.

15. A device recovery method, characterized in that: Applied to electronic equipment, the electronic equipment includes an audio power amplifier chip, a short-range communication module, and a speaker; the method includes: When the electronic device is in a shutdown state, receiving a first instruction from a second electronic device through the short-range communication module; The audio power amplifier chip outputs audio through the speaker in response to the first instruction.

16. The method according to claim 15, characterized in that The method further comprises: After receiving the first instruction, the short-range communication module sends a second instruction to the audio power amplifier chip, where the second instruction is used to start the audio power amplifier chip.

17. The method according to claim 15 or 16, characterized in that The electronic device further comprises a battery, and the method further comprises: When the electronic device is in a shutdown state, the audio power amplifier chip and / or the short-range communication module are powered by the battery.

18. The method according to claim 17, characterized in that The electronic device further includes a power switch, and the method further includes: When the electronic device is in a shutdown state, the battery is controlled by the power switch to supply power to the audio power amplifier chip and the short-range communication module.

19. The method according to claim 15 or 16, characterized in that The electronic device further includes a power supply monitoring module, and the method further includes: When the electronic device is in a shutdown state, the audio power amplifier chip and the short-range communication module are powered by the power monitoring module.

20. The method according to any one of claims 15 to 19, characterized in that: The method further comprises: When the electronic device is in a power-off state, if the short-range communication module does not receive the first instruction within a preset time period, the short-range communication module is in a power-off state.

21. The method according to any one of claims 15 to 19, characterized in that: The method further comprises: The short-range communication module is in a power-on state within a preset period, and is in a power-off state outside the preset period.

22. The method according to any one of claims 15 to 21, characterized in that: When the electronic device is in a shutdown state, the short-range communication module is operated by a low-power core in the electronic device.

23. The method according to any one of claims 15 to 22, characterized in that: The electronic device further includes a positioning module, and the method further includes: The positioning module obtains the location information of the electronic device in response to the first instruction, and uploads the location information to a server.

24. The method according to claim 23, characterized in that The method further comprises: After receiving the first instruction, the short-range communication module sends a third instruction to the positioning module, where the third instruction is used to start the positioning module.

25. A computer-readable storage medium, characterized in that: The computer-readable storage medium comprises a computer program, and when the computer program is executed on the method, the method is caused to perform the method according to any one of claims 15 to 24.

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