Electronic equipment and microphone array power supply control method

Abstract

The embodiment of the invention discloses electronic equipment and a microphone array power supply control method, the electronic equipment comprises a microphone array, a main processor and a low-power-consumption processor, the microphone array comprises at least one first microphone and at least one second microphone, and the first microphone is connected with a first power supply circuit and a second power supply circuit which are connected in parallel; the second microphone is connected with a third power supply circuit, and after the electronic equipment is started, the main processor controls the first power supply circuit to supply power to the first microphone, controls the third power supply circuit to supply power to the second microphone and controls the second power supply circuit to be powered off; the main processor responds to the standby instruction, is switched to a standby state and controls the first power supply circuit and the third power supply circuit to be powered off; when the main processor is in a standby state, the low-power-consumption processor sends a high-level signal to the second power supply circuit through the control interface, so that the second power supply circuit is switched to a power-on state under the action of the high-level signal and supplies power to the first microphone, and the standby power consumption is reduced.

Description

Technical Field

[0001] This application relates to the field of power management technology, and in particular to a power supply control method for electronic devices and microphone arrays. Background Technology

[0002] Electronic devices can be equipped with microphone arrays to collect and respond to far-field voice signals, allowing users to input voice signals from a distance. This is commonly used in voice interaction scenarios such as smart home voice control and voice assistants. Microphone arrays consist of multiple microphones. When the electronic device is in standby mode, it continues to power all microphones, maintaining full microphone operation and increasing standby power consumption. Summary of the Invention

[0003] Some embodiments of this application provide a power supply control method for an electronic device and a microphone array, which enables only some microphones of the microphone array to work when the electronic device is in standby mode, thus ensuring voice function in standby mode and reducing standby power consumption.

[0004] In a first aspect, some embodiments of this application provide an electronic device, including: A microphone array includes at least one first microphone and at least one second microphone, wherein the first microphone is connected to a first power supply circuit and a second power supply circuit connected in parallel; and the second microphone is connected to a third power supply circuit. The main processor is configured to: after the electronic device is powered on, control the first power supply circuit to supply power to the first microphone, control the third power supply circuit to supply power to the second microphone, and control the second power supply circuit to power off. The main processor is also configured to: switch to standby mode in response to a standby command, and control the first power supply circuit and the third power supply circuit to disconnect from power; A low-power processor is connected to the second power supply circuit via a control interface; the low-power processor is configured to send a high-level signal to the second power supply circuit via the control interface when the main processor is in standby mode, so that the second power supply circuit switches to a power-on state under the action of the high-level signal and supplies power to the first microphone.

[0005] The beneficial effects of the embodiments in the first aspect above are as follows: the microphone array includes two types of microphones, wherein the first microphone is a microphone that powers on and operates when the electronic device is in standby mode, and the second microphone is a microphone that is powered off when the electronic device is in standby mode; in this application, the first microphone is connected to a first power supply circuit and a second power supply circuit in parallel, and the second microphone is connected to a third power supply circuit, wherein the first power supply circuit and the third power supply circuit can be normal circuits (i.e., power supply circuits activated when the device is powered on), and the second power supply circuit is a standby circuit (power supply circuit activated when the device is in standby mode). In this way, after the electronic device is powered on, the main processor works, powering the first microphone through the first power supply circuit and the second microphone through the third power supply circuit, and the second power supply circuit is powered off, so that all microphones in the microphone array are powered on and operating when the device is powered on, realizing the global working mode of the microphone array.

[0006] When the electronic device is in standby mode, the main processor is in standby mode, and the first and third power supply circuits are powered off. At this time, the low-power processor sends a high-level signal to the second power supply circuit through the control interface. Under the action of the high-level signal, the second power supply circuit turns on itself and can transmit an effective power signal (e.g., 3.3V) to the first microphone, thereby powering the first microphone. Since the second microphone is not equipped with a power supply circuit for device standby, and the third power supply circuit does not supply power when the device is in standby, the second microphone is powered off. This enables only the first microphone to be powered on and working when the device is in standby, realizing a partial working mode of the microphone array, reducing the standby power consumption of the device, and can also automatically adapt the power supply logic according to the operating status of the electronic device, accurately controlling the working mode of the microphone array.

[0007] In some embodiments of the first aspect, before sending a high-level signal to the second power supply circuit through the control interface, the low-power processor is further configured to: acquire the on / off state of the voice wake-up function; wherein, the voice wake-up function refers to the function of the low-power processor controlling the electronic device to power on in response to a voice wake-up command when the electronic device is in standby mode; if the voice wake-up function is in a disabled state, a low-level signal is sent to the second power supply circuit through the control interface so that the second power supply circuit remains powered off under the action of the low-level signal.

[0008] The beneficial effects of this embodiment are as follows: the electronic device can be configured with a voice wake-up function, that is, when the electronic device is in standby mode, it supports users to quickly wake up the electronic device by voice; when the voice wake-up function is turned off, the low-power processor can send a low-level signal to the second power supply circuit through the control interface. Under the action of the low-level signal, the second power supply circuit will not be turned on, that is, it will remain in a power-off state. In this way, when the device is in standby mode, for scenarios where voice wake-up is not required, all microphones in the microphone array are in a power-off state, thereby further reducing the standby power consumption of the device.

[0009] In some embodiments of the first aspect, the low-power processor sends a high-level signal to the second power supply circuit through the control interface, specifically configured to send a high-level signal to the second power supply circuit through the control interface if the voice wake-up function is enabled.

[0010] The beneficial effects of this embodiment are as follows: when the voice wake-up function is enabled, the power processor can send a high-level signal to the second power supply circuit through the control interface. The second power supply circuit is turned on under the action of the high-level signal and switches to the power-on state, so that the second power supply circuit can supply power to the first microphone, thereby switching to the local working mode of the microphone array. While ensuring that the voice wake-up function can be effectively executed, the standby power consumption of the device is reduced.

[0011] Secondly, some embodiments of this application also provide an electronic device, including: A microphone array includes at least one first microphone and at least one second microphone. The first microphone is connected to a first power supply circuit and a second power supply circuit in parallel, and a conduction resistor is connected in series between the first microphone and the second power supply circuit. The second microphone is connected to a third power supply circuit and a fourth power supply circuit in parallel, and the second microphone and the fourth power supply circuit are in an open circuit structure. The main processor is configured to, after the electronic device is powered on, control the first power supply circuit to power the first microphone, control the third power supply circuit to power the second microphone, and control the second power supply circuit and the fourth power supply circuit to power off. The main processor is also configured to: switch to standby mode in response to a standby command, and control the first power supply circuit and the third power supply circuit to disconnect from power; A low-power processor is connected to the second power supply circuit and the fourth power supply circuit via a control interface. The low-power processor is configured to: when the main processor is in standby mode, send high-level signals to the second power supply circuit and the fourth power supply circuit respectively via the control interface, so that the second power supply circuit supplies power to the first microphone under the action of the high-level signal and the on-resistance, and so that the fourth power supply circuit does not supply power to the second microphone under the action of the high-level signal and the circuit breaker setting.

[0012] The beneficial effects of the embodiments in the second aspect above are as follows: The microphone array includes two types of microphones, wherein the first microphone is a microphone that powers on and operates when the electronic device is in standby mode, and the second microphone is a microphone that is powered off when the electronic device is in standby mode. In this application, the first microphone is connected to a first power supply circuit and a second power supply circuit in parallel. The first microphone and the second power supply circuit are connected through a conduction resistor. The function of the conduction resistor is to make the power supply line between the second power supply circuit and the first microphone conductive, forming a power supply path, so that the power signal output by the second power supply circuit can reach the first microphone, enabling the first microphone to power on and operate when the device is in standby mode. The second microphone is connected to a third power supply circuit and a fourth power supply circuit in parallel, but the second microphone and the fourth power supply circuit are in an open circuit structure, that is, a power supply path cannot be formed, so that the power signal output by the fourth power supply circuit cannot reach the second microphone, causing the second microphone to be powered off when the device is in standby mode. After the electronic device is powered on, the main processor works, powering the first microphone through the first power supply circuit and the second microphone through the third power supply circuit. The second power supply circuit and the fourth power supply circuit are powered off, realizing that all microphones in the microphone array are powered on and operating when the device is powered on, realizing the global working mode of the microphone array.

[0013] When the electronic device is in standby mode, the main processor is in standby mode, and the first and third power supply circuits are powered off. At this time, the low-power processor sends a high-level signal to the second and fourth power supply circuits through the control interface. Under the action of the high-level signal, the second power supply circuit conducts itself, that is, the second power supply circuit can output a valid power signal (e.g., 3.3V), and the on-resistance allows the power signal to reach the first microphone, thereby enabling the second power supply circuit to power the first microphone. Although the fourth power supply circuit conducts itself under the action of the high level and can output a valid power signal, due to the open circuit setting, the power signal cannot reach the second microphone, so the second microphone is powered off. This achieves the goal of only powering on the first microphone when the device is in standby mode, realizing a partial working mode of the microphone array, reducing the standby power consumption of the device, and can also automatically adapt the power supply logic according to the operating status of the electronic device, accurately controlling the working mode of the microphone array. Furthermore, at the physical level, the microphone array circuit board provides a standby power supply circuit (including a second and fourth power supply circuit) for each microphone connected to the device in standby mode. Before testing or shipping, a series on-resistor can be connected to the first microphone that is powered in standby mode (i.e., the upper component is turned on), while the on-resistor is not connected to the second microphone that is not powered in standby mode (i.e., the circuit is open). This allows for more efficient and convenient configuration of the standby power supply circuit for each microphone. Thus, once the basic architecture of the microphone array's power supply circuit in power-on / standby mode is set up, no changes are needed. Only the upper component on-resistor is required to establish the standby power supply path; there is no need to install or remove the standby power supply circuit, improving production and testing efficiency.

[0014] In some embodiments of the second aspect, before sending high-level signals to the second power supply circuit and the fourth power supply circuit respectively through the control interface, the low-power processor is further configured to: acquire the on / off state of the voice wake-up function; wherein, the voice wake-up function refers to the function of the low-power processor controlling the electronic device to power on in response to a voice wake-up command when the electronic device is in standby mode; if the voice wake-up function is in a disabled state, then a low-level signal is sent to the second power supply circuit and the fourth power supply circuit respectively through the control interface, so that the second power supply circuit and the fourth power supply circuit remain in a power-off state under the action of the low-level signal.

[0015] The beneficial effects of this embodiment are as follows: the electronic device can be configured with a voice wake-up function, that is, when the electronic device is in standby mode, it supports users to quickly wake up the electronic device by voice; when the voice wake-up function is turned off, the low-power processor can send a low-level signal to the second power supply circuit and the fourth power supply circuit through the control interface. Under the action of the low-level signal, the second power supply circuit and the fourth power supply circuit will not be turned on, that is, they will remain in a power-off state. In this way, when the device is in standby mode, for scenarios where voice wake-up is not required, all microphones in the microphone array are in a power-off state, thereby further reducing the standby power consumption of the device.

[0016] In some embodiments of the second aspect, the low-power processor sends high-level signals to the second power supply circuit and the fourth power supply circuit respectively through the control interface, specifically configured to: if the voice wake-up function is enabled, send high-level signals to the second power supply circuit and the fourth power supply circuit respectively through the control interface.

[0017] The beneficial effects of this embodiment are as follows: When the voice wake-up function is enabled, the power processor can send a high-level signal to the second power supply circuit and the fourth power supply circuit through the control interface. The second power supply circuit and the fourth power supply circuit are turned on under the action of the high-level signal and switched to the power-on state. The power signal output by the second power supply circuit can directly reach the first microphone through the on-resistor, while the power signal output by the fourth power supply circuit is blocked by the circuit breaking structure and cannot reach the second microphone, thereby switching to the local working mode of the microphone array. While ensuring that the voice wake-up function can be effectively executed, the standby power consumption of the device is reduced.

[0018] In some embodiments of the second aspect, the electronic device further includes a microphone array circuit board, which carries the first power supply circuit and the second power supply circuit connected to the first microphone, and carries the third power supply circuit and the fourth power supply circuit connected to the second microphone; a corresponding resistor mounting position is provided on the microphone array circuit board for each microphone in the microphone array; a conducting resistor is installed in the first resistor mounting position between the first microphone and the second power supply circuit, the first end of the conducting resistor is connected to the output terminal of the second power supply circuit, the second end of the conducting resistor is connected to the power input terminal of the first microphone, and the resistance value of the conducting resistor is less than a first threshold.

[0019] The beneficial effects of this embodiment are as follows: A corresponding resistor mounting position can be reserved on the microphone array circuit board for each microphone. This resistor mounting position is used to install a conduction resistor. Installing a conduction resistor at the first resistor mounting position between the first microphone and its second power supply circuit causes the first end of the resistor to connect to the output terminal of the second power supply circuit, and the second end of the conduction resistor to connect to the power input terminal of the first microphone. This completes the connection of the conduction resistor, activating the power supply line of the first microphone, allowing the power signal output from the second power supply circuit to directly reach the first microphone through the conduction resistor. This provides power to the first microphone when the device is in standby mode and facilitates on-demand connection during testing or at the factory. The resistance value of the conduction resistor is less than a first threshold (i.e., a low-impedance resistor), for example, a zero-ohm resistor. This makes the conduction resistor function like a wire or a closed switch, reducing circuit loss and voltage drop, and maximizing the stability of the power signal output from the second power supply circuit reaching the first microphone.

[0020] In some embodiments of the second aspect, the circuit breaking structure is such that the second resistor mounting position between the second microphone and the fourth power supply circuit is left vacant.

[0021] The beneficial effects of this embodiment are as follows: the circuit breaking structure allows for the installation of a high-impedance resistor at the second resistor mounting position, preventing the voltage / current of the power supply signal output by the fourth power supply circuit from driving the microphone. This approach would increase additional hardware costs and power consumption. Therefore, the second resistor mounting position can be left unused, thereby creating a physical "breakpoint" (zero power consumption) on the power supply line of the second microphone. This eliminates the need for additional hardware overhead and allows the microphone array to be completely powered off when the device is in standby mode, reducing standby power consumption. It also prevents additional load or interference caused by poor soldering, leaks, or other factors.

[0022] Thirdly, some embodiments of this application also provide a microphone array power supply control method in an electronic device, the electronic device including a microphone array, a main processor, and a low-power processor, wherein the microphone array includes at least one first microphone and at least one second microphone, the first microphone being connected to a first power supply circuit and a second power supply circuit connected in parallel; the second microphone being connected to a third power supply circuit; the method includes: After the electronic device is powered on, the main processor controls the first power supply circuit to supply power to the first microphone, controls the third power supply circuit to supply power to the second microphone, and controls the second power supply circuit to power off. The main processor responds to the standby command, switches to standby mode, and controls the first power supply circuit and the third power supply circuit to disconnect from power. When the main processor is in standby mode, the low-power processor sends a high-level signal to the second power supply circuit through the control interface, so that the second power supply circuit switches to the power-on state under the action of the high-level signal and supplies power to the first microphone.

[0023] The beneficial effects of the embodiments in the third aspect above are as follows: the microphone array includes two types of microphones, wherein the first microphone is a microphone that powers on and operates when the electronic device is in standby mode, and the second microphone is a microphone that is powered off when the electronic device is in standby mode; in this application, the first microphone is connected to a first power supply circuit and a second power supply circuit in parallel, and the second microphone is connected to a third power supply circuit, wherein the first power supply circuit and the third power supply circuit can be normal circuits (i.e., power supply circuits activated when the device is powered on), and the second power supply circuit is a standby circuit (power supply circuit activated when the device is in standby mode). In this way, after the electronic device is powered on, the main processor works, powering the first microphone through the first power supply circuit and the second microphone through the third power supply circuit, and the second power supply circuit is powered off, so that all microphones in the microphone array are powered on and operating when the device is powered on, realizing the global working mode of the microphone array.

[0024] When the electronic device is in standby mode, the main processor is in standby mode, and the first and third power supply circuits are powered off. At this time, the low-power processor sends a high-level signal to the second power supply circuit through the control interface. Under the action of the high-level signal, the second power supply circuit turns on itself and can transmit an effective power signal (e.g., 3.3V) to the first microphone, thereby powering the first microphone. Since the second microphone is not equipped with a power supply circuit for device standby, and the third power supply circuit does not supply power when the device is in standby, the second microphone is powered off. This enables only the first microphone to be powered on and working when the device is in standby, realizing a partial working mode of the microphone array, reducing the standby power consumption of the device, and can also automatically adapt the power supply logic according to the operating status of the electronic device, accurately controlling the working mode of the microphone array.

[0025] Fourthly, some embodiments of this application also provide a microphone array power supply control method in an electronic device, the electronic device including a microphone array, a main processor, and a low-power processor, wherein the microphone array includes at least one first microphone and at least one second microphone, the first microphone is connected to a first power supply circuit and a second power supply circuit in parallel, and a conduction resistor is connected in series between the first microphone and the second power supply circuit; the second microphone is connected to a third power supply circuit and a fourth power supply circuit in parallel, and the second microphone and the fourth power supply circuit are in an open-circuit structure; the method includes: After the electronic device is powered on, the main processor controls the first power supply circuit to supply power to the first microphone, controls the third power supply circuit to supply power to the second microphone, and controls the second power supply circuit and the fourth power supply circuit to be powered off. The main processor responds to the standby command, switches to standby mode, and controls the first power supply circuit and the third power supply circuit to disconnect from power. When the main processor is in standby mode, the low-power processor sends high-level signals to the second power supply circuit and the fourth power supply circuit through the control interface, so that the second power supply circuit supplies power to the first microphone under the action of the high-level signal and the on-resistance, and the fourth power supply circuit does not supply power to the second microphone under the action of the high-level signal and the circuit breaking setting.

[0026] The beneficial effects of the embodiments in the fourth aspect above are as follows: The microphone array includes two types of microphones, wherein the first microphone is a microphone that powers on and operates when the electronic device is in standby mode, and the second microphone is a microphone that is powered off when the electronic device is in standby mode. In this application, the first microphone is connected to a first power supply circuit and a second power supply circuit in parallel. The first microphone and the second power supply circuit are connected through a conduction resistor. The function of the conduction resistor is to make the power supply line between the second power supply circuit and the first microphone conductive, forming a power supply path, so that the power signal output by the second power supply circuit can reach the first microphone, enabling the first microphone to power on and operate when the device is in standby mode. The second microphone is connected to a third power supply circuit and a fourth power supply circuit in parallel, but the second microphone and the fourth power supply circuit are in an open circuit structure, that is, a power supply path cannot be formed, so that the power signal output by the fourth power supply circuit cannot reach the second microphone, causing the second microphone to be powered off when the device is in standby mode. After the electronic device is powered on, the main processor works, powering the first microphone through the first power supply circuit and the second microphone through the third power supply circuit. The second power supply circuit and the fourth power supply circuit are powered off, realizing that all microphones in the microphone array are powered on and operating when the device is powered on, realizing the global working mode of the microphone array.

[0027] When the electronic device is in standby mode, the main processor is in standby mode, and the first and third power supply circuits are powered off. At this time, the low-power processor sends a high-level signal to the second and fourth power supply circuits through the control interface. Under the action of the high-level signal, the second power supply circuit conducts itself, that is, the second power supply circuit can output a valid power signal (e.g., 3.3V), and the on-resistance allows the power signal to reach the first microphone, thereby enabling the second power supply circuit to power the first microphone. Although the fourth power supply circuit conducts itself under the action of the high level and can output a valid power signal, due to the open circuit setting, the power signal cannot reach the second microphone, so the second microphone is powered off. This achieves the goal of only powering on the first microphone when the device is in standby mode, realizing a partial working mode of the microphone array, reducing the standby power consumption of the device, and can also automatically adapt the power supply logic according to the operating status of the electronic device, accurately controlling the working mode of the microphone array. Furthermore, at the physical level, the microphone array circuit board connects to the standby circuit (including the second and fourth power supply circuits) for each microphone during device standby. Before testing or shipping, a series on-resistor can be connected to the first microphone that supplies power during standby (i.e., the upper component is turned on), while no on-resistor is connected to the second microphone that does not supply power during standby (i.e., the circuit is open). This allows for more efficient and convenient configuration of the standby power supply circuit for each microphone. Thus, once the basic architecture of the microphone array's power supply circuit under power-on / standby conditions is set up, no changes are needed. Only the upper component's on-resistor is required to establish the standby power supply path; there is no need to install or remove the standby power supply circuit, improving production and testing efficiency. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in some embodiments of this application or in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 A schematic diagram illustrating a far-field voice interaction scenario provided in some embodiments of this application; Figure 2 Hardware configuration block diagrams of electronic devices provided in some embodiments of this application; Figure 3 A schematic diagram of microphone array power supply control logic A1 provided in some embodiments of this application; Figure 4 A schematic diagram of microphone array power supply control logic A2 provided in some embodiments of this application; Figure 5A schematic diagram of the control architecture of the standby power supply circuit for the device in standby mode provided in some embodiments of this application; Figure 6 A schematic diagram of microphone array power supply control logic B1 provided in some embodiments of this application; Figure 7 A schematic diagram of microphone array power supply control logic B2 provided in some embodiments of this application; Figure 8 A schematic diagram of the microphone array power supply control logic C1 provided in some embodiments of this application; Figure 9 A schematic diagram of the microphone array power supply control logic C2 provided in some embodiments of this application; Figure 10 This is a schematic diagram of the structure of a microphone array circuit board provided in some embodiments of this application. Detailed Implementation

[0030] The embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described below do not represent all embodiments consistent with this application. They are merely examples of systems and methods consistent with some aspects of this application as detailed in the claims.

[0031] It should be noted that the brief descriptions of terms in this application are only for the convenience of understanding the embodiments described below, and are not intended to limit the embodiments of this application. Unless otherwise stated, these terms should be understood in their ordinary and common meaning.

[0032] The terms "first," "second," "third," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar or related objects or entities, and do not necessarily imply a specific order or sequence, unless otherwise specified. It should be understood that such terms are interchangeable where appropriate.

[0033] The terms “comprising” and “having”, and any variations thereof, are intended to cover but not exclude inclusion, for example, a product or device that includes a range of components is not necessarily limited to all of the components that are clearly listed, but may include other components that are not clearly listed or that are inherent to such product or device.

[0034] The term "module" refers to any known or subsequently developed hardware, software, firmware, artificial intelligence, fuzzy logic, or combination of hardware and / or software code that is capable of performing the functions associated with that element.

[0035] In this application embodiment, electronic devices generally refer to devices that have at least far-field voice functionality and computer processing capabilities. Electronic devices include, but are not limited to: smart home appliances (e.g., smart TVs, smart refrigerators, smart air conditioners, etc.), smart speakers, and all-in-one conference tablets, etc.

[0036] Figure 1 This is a schematic diagram of a far-field voice interaction scenario provided in some embodiments of this application.

[0037] like Figure 1 As shown, the electronic device 100 is equipped with a microphone array 1201, which collects and responds to far-field voice signals, allowing users to input voice signals from a distance from the microphone array 1201. This is commonly used in voice interaction scenarios such as smart home voice control and voice assistants. For example, when the electronic device 100 is in standby mode, it receives a voice wake-up signal collected by the microphone array, triggering the device power-on process.

[0038] like Figure 1 As shown, the microphone array 1201 includes M microphones (e.g., Figure 1 The example in the text is 4 microphones, which are composed of M microphones arranged in a specific array structure. The principle is to use the time difference, phase difference and intensity difference of sound waves to reach different microphones, and then process the information through algorithms to achieve functions such as sound source localization, beamforming, noise suppression and echo cancellation.

[0039] In some embodiments, such as Figure 1 As shown, electronic device 100 can communicate with server 200 via various communication methods. Electronic device 100 can communicate via local area network (LAN), wireless local area network (WLAN), and other networks. Electronic device 100 can send voice signals collected by microphone array 1201 to server 200, where server 200 performs far-field voice processing, semantic understanding, intent recognition, and other processing. Based on the voice processing results provided by server 200, electronic device 100 can request corresponding business data from server 200.

[0040] Figure 2 Hardware configuration block diagrams of electronic devices provided in some embodiments of this application.

[0041] In some embodiments, the electronic device 100 may include at least one of the following: a communication device 110, a detector 120, a device interface 130, a controller 140, a display 150, an audio output device 160, a power supply 170, and a memory 180.

[0042] In some embodiments, detector 120 is used to acquire signals from the external environment or signals interacting with the outside world. Detector 120 includes a microphone array 1201 for acquiring far-field speech signals. Microphone array 1201 includes M microphones. In some embodiments, display 150 includes display function components for presenting an image and driving components for driving the image display. Display 150 is used to receive and display image signals output from controller 140. For example, display 150 can be used for image content related to voice interaction.

[0043] In some embodiments, the communication device 110 is a component used to communicate with external devices or the server 200 according to various communication protocol types. The communication device 110 includes, but is not limited to, WiFi modules, Bluetooth modules, and Ethernet modules.

[0044] In some embodiments, the controller 140 may include at least one of a main processor, a low-power processor, a video processor, an audio processor, and a graphics processor, and a first to an nth interface for input / output. The controller 140 controls the operation of the electronic device and responds to user operations through various software control programs stored in the memory 180. The controller 140 controls the overall operation of the electronic device 100.

[0045] In some embodiments, the main processor is, for example, a central processing unit (CPU), a system-on-chip (SoC), etc. The main processor is used to control the electronic device 100 when the electronic device is in a power-on (Normal) state, including the normal power supply control of the microphone array 1201.

[0046] In some embodiments, when the electronic device 100 is in standby mode, the main processor is also in standby mode. At this time, the low-power processor executes relevant programs to realize basic operations in standby mode while reducing device power consumption, including: receiving and responding to remote control commands, voice commands and external messages, and controlling the standby power supply of the microphone array 1201.

[0047] In some embodiments, the audio output device 160 is used to output audio, such as outputting voice signals collected by the microphone array 1201, or outputting response information to user voice signals. The audio output device 160 can be the built-in speaker of the electronic device 100, or it can be an external audio output device connected to the electronic device 100.

[0048] In some embodiments, the power supply 170 may include a microphone array circuit board for supplying power to relevant components of the electronic device 100. The microphone array circuit board is configured with at least a power supply circuit for powering the microphone array 1201, and a power interface for an external socket, etc. Thus, the controller 140 (main processor or low-power processor) can control the relevant power supply circuit in the power supply to perform power-on and power-off operations on the microphone array 1201.

[0049] Figure 3 This is a schematic diagram of microphone array power supply control logic A1 provided in some embodiments of this application.

[0050] In some embodiments, the microphone array 1201 includes M microphones 1201a. For example... Figure 3 and Figure 4 As shown, taking M=4 (i.e., 4 microphones) as an example, each microphone 1201a is connected to an independent standby power supply circuit. The standby power supply circuit is the circuit that supplies power to the components when the device is in standby mode. The power supply voltage is, for example, 3.3V.

[0051] In some embodiments, see Figure 3 When the electronic device 100 is powered on, the low-power processor stops working, and the main processor executes the microphone array power supply control logic A1.

[0052] In some embodiments, see Figure 3 The microphone array power supply control logic A1 is configured such that: when the main processor detects that the device is powered on, it provides input power to the M standby power supply circuits, enabling the M standby power supply circuits to conduct and send a standby_MIC signal to their respective connected microphones 1201a. The standby_MIC signal is used to power the microphones 1201a. In this way, the global working mode of the microphone array 1201 is automatically triggered after the electronic device 100 is powered on, that is, all M microphones 1201a are powered on and working.

[0053] Figure 4 This is a schematic diagram of microphone array power supply control logic A2 provided in some embodiments of this application.

[0054] In some embodiments, the main processor responds to a standby command and switches to standby mode. In this scenario, the main processor stops working, and the low-power processor starts running. For example... Figure 4As shown, the low-power processor can control the on / off state of the standby power supply circuit through the GPIO (General Purpose Input / Output) interface. The purposes of this design include: ① GPIO is used to output simple level signals, and the power consumption required to send level signals is low, which can reduce standby power consumption; ② It can achieve isolation between power domains, ensuring that only necessary circuits are powered; ③ When the device is in standby mode, it usually relies on external interrupts or specific events to wake it up. GPIO can work with wake-up sources (such as voice wake-up signals) to achieve a flexible wake-up mechanism, ensuring that the system can quickly resume operation when needed; ④ Using GPIO as a switch to control the on / off state of the circuit can isolate the fault when the standby power supply circuit malfunctions (such as a short circuit), avoiding current surges and damage to the device's electronic components, thus serving as a fault protection mechanism.

[0055] In some embodiments, see Figure 4 The microphone array power supply control logic A2 executed by the low-power processor is configured as follows: the low-power processor can send on / off control signals to the GPIO based on the usage scenario; upon receiving the on / off control signals, the GPIO sends uniform level signals to the M standby power supply circuits respectively, so that the M standby power supply circuits are turned on or off under the action of the level signals. When the standby power supply circuit is turned on, a standby_MIC signal with a preset voltage (e.g., 3.3V) is output, thereby powering the microphone 1201a; when the standby power supply circuit is turned off, there is no signal output, which is equivalent to the standby_MIC signal being 0V, so the microphone 1201a is not powered (i.e., power is off).

[0056] Figure 5 A schematic diagram of the control architecture of the standby power supply circuit for the device in standby mode provided in some embodiments of this application. Figure 5 The left side illustrates the GPIO connection structure. Figure 5 The right side illustrates the structure of the standby power supply circuit.

[0057] In some embodiments, such as Figure 5 As shown, the T8 control interface in GPIO is connected to the controlled terminal of the Standby power supply circuit. The controlled terminal is used to receive the level signal (MIC_PWR_EN) sent by the T8 control interface. This level signal is either a high level signal or a low level signal.

[0058] In some embodiments, such as Figure 5The example circuit structure, the standby power supply circuit includes: power input terminal, controlled terminal, transistor V20, field-effect transistor V19 (i.e. MOSFET), signal output terminal (3.3V_Standby_MIC) and related auxiliary components (capacitors, resistors, etc.).

[0059] In some embodiments, such as Figure 5 As shown, the power input terminal is used to connect to the system standby power supply (3.3V_Standby), thereby providing the basic power supply voltage for the standby power supply circuit. C326 and C327 are filter capacitors, connected in parallel to the power input terminal, used to filter out high-frequency noise and ensure the purity of the power signal.

[0060] In some embodiments, such as Figure 5 As shown, transistor V20 and field-effect transistor V19 form a cascaded switch structure. Transistor V20 is the control stage switch, using the base level to control the conduction or cutoff of the collector-emitter junction. Pin 1 of transistor V20 is the base, pin 2 is the emitter, and pin 3 is the collector. The base is connected to the controlled terminal via resistor R460. The base can also be connected in parallel with resistor R461, which acts as a pull-down resistor to prevent malfunctions caused by floating signals. The emitter is grounded (GND). The collector is connected to the field-effect transistor V19 via resistor R459 to drive V19.

[0061] In some embodiments, such as Figure 5 As shown, the field-effect transistor V19 is a power stage switch that uses the gate-source voltage to control the conduction or cutoff of the drain-source junction. Pin 1 of the V19 is the gate (G), pin 2 is the source (S), and pin 3 is the drain (D). The source is connected to the system standby power supply (3.3V_Standby) via the power input terminal. S =3.3V. The gate is connected to the collector of transistor V20 via R459, and pulled down to the source via R457 to prevent the gate from floating. The drain is connected to the signal output terminal to output the Standby_MIC signal. If Standby_MIC=3.3V, the microphone is powered; if Standby_MIC=0V, the microphone is not powered (i.e., power is off).

[0062] In some embodiments, such as Figure 5 As shown, if the controlled terminal receives a high level MIC_PWR_EN, the base of transistor V20 receives sufficient current to turn on transistor V20. This pulls the gate of field-effect transistor V19 low to near GND (V G ≈0), V GS = V G -V S = -3.3V, this V GS Less than the threshold voltage VGS(th) (Usually set to -1.5V), then the field-effect transistor V19 is turned on, and the drain output Standby_MIC = 3.3V.

[0063] In some embodiments, such as Figure 5 As shown, if the MIC_PWR_EN received by the controlled terminal is low, there is no current at the base of transistor V20, causing transistor V20 to be cut off. In this case, the gate of field-effect transistor V19 is pulled up to the source through R457 (V G = V S =0), V GS =V G -V S =0V, this V GS Greater than the threshold voltage V GS(th) When the voltage is low, the MOSFET V19 is cut off, and there is no output at the drain, which is equivalent to Standby_MIC = 0V. Therefore, by controlling the level of MIC_PWR_EN output from the GPIO, the on / off state of the Standby power supply circuit can be controlled, thereby controlling whether power is supplied to the microphone.

[0064] In some embodiments, the electronic device may be configured with a voice wake-up function, which refers to the function of a low-power processor responding to a voice wake-up command and controlling the electronic device to power on when the electronic device is in standby mode. Users can enable or disable the voice wake-up function through the system settings of the electronic device.

[0065] In some embodiments, the low-power processor can query the system settings application to determine the on / off status of the voice wake-up function. If the voice wake-up function is off, see [link to relevant documentation]. Figure 4 and Figure 5 The low-power processor can send a first control signal to the control interface (e.g., the T8 interface in GPIO). Upon receiving the first control signal, the control interface sends a low-level MIC_PWR_EN signal (i.e., MIC_PWR_EN=0) to the M standby power supply circuits. Under the influence of the low-level signal, both transistor V20 and MOSFET V19 are cut off, resulting in Standby_MIC=0V output at the circuit's signal output terminal. Therefore, all M microphones 1201a in the microphone array 1201 are in a power-off state. Thus, when the electronic device 100 is in standby mode, for scenarios where voice wake-up is not required, all microphones in the microphone array 1201 are powered off (i.e., zero-microphone working mode), further reducing the device's standby power consumption.

[0066] In some embodiments, if the voice wake-up function is enabled, see [link to relevant documentation]. Figure 4 and Figure 5The low-power processor can send a second control signal to the control interface (e.g., the T8 interface in GPIO). Upon receiving the second control signal, the control interface sends a high-level MIC_PWR_EN signal (i.e., MIC_PWR_EN=1) to the M standby power supply circuits. Under the influence of the high-level signal, both transistor V20 and MOSFET V19 are turned on, causing the standby_MIC output at the circuit's signal output terminal to reach a preset voltage (e.g., 3.3V), thereby powering the M microphones 1201a in the microphone array 1201 (i.e., full-microphone working mode). Thus, when the electronic device 100 is in standby mode, all microphones in the microphone array 1201 are powered on and operational in scenarios requiring voice wake-up.

[0067] In the power supply control logic A1 / A2 provided in the above embodiments, when the electronic device is powered on or running, or when the electronic device is in standby mode and the voice wake-up function is enabled, all microphones in the microphone array are powered on; when the electronic device is in standby mode and the voice wake-up function is disabled, all microphones in the microphone array are powered off.

[0068] When an electronic device is in standby mode and the voice wake-up function is enabled, at least one microphone in the microphone array needs to be powered on to ensure the reception and response to the voice wake-up command. However, when the device is in standby mode, the full microphone working mode will increase the power consumption of the microphone array and increase the standby power consumption of the device, which does not meet the energy-saving requirements.

[0069] Figure 6 This is a schematic diagram of microphone array power supply control logic B1 provided in some embodiments of this application.

[0070] In some embodiments, the electronics manufacturer may select from the microphone array 1201 at least one microphone (hereinafter referred to as the first microphone) that needs to remain powered on while the electronics are in standby mode, and the remaining microphones (hereinafter referred to as the second microphones) are powered off while the electronics are in standby mode. Assume that the microphone array 1201 includes M microphones, where the number of first microphones is N (N≥1) and the number of second microphones is Q (Q≥1), i.e., N+Q=M.

[0071] In some embodiments, such as Figure 6 and Figure 7As shown, the microphone array 1201 includes N first microphones 1201x and Q second microphones 1201y, with M=4 and N=Q=2 as an example in the schematic diagram. Each first microphone 1201x is connected to a first power supply circuit and a second power supply circuit connected in parallel, and each second microphone 1201y is connected to a third power supply circuit. The first and third power supply circuits are both normal power supply circuits, which supply power to the microphones when the electronic device is powered on; the second power supply circuit is a standby power supply circuit, which supplies power to the microphones when the electronic device is in standby mode. The power supply voltage of the normal and standby power supply circuits is, for example, 3.3V.

[0072] In some embodiments, see Figure 6 When the electronic device 100 is powered on, the low-power processor stops working, and the main processor executes the microphone array power supply control logic B1.

[0073] In some embodiments, see Figure 6 The microphone array power supply control logic B1 is configured as follows: When the main processor detects that the electronic device is powered on, it provides power (e.g., 3.3_Normal) to the first and third power supply circuits, but does not provide power to the second power supply circuit. Thus, the second power supply circuit (i.e., N standby power supply circuits) is de-energized, while the first and third power supply circuits (a total of M normal power supply circuits) are energized. The first power supply circuit then sends a Normal_MIC signal to the first microphone 1201x, and the third power supply circuit sends a Normal_MIC signal to the second microphone 1201y. The Normal_MIC signal is used to power the microphones when the device is powered on. In this way, after the electronic device 100 is powered on, by scheduling the Normal power supply circuits of the first microphone 1201x and the second microphone 1201y to be activated, the full-microphone working mode of the microphone array 1201 is achieved.

[0074] Figure 7 This is a schematic diagram of microphone array power supply control logic B2 provided in some embodiments of this application.

[0075] In some embodiments, such as Figure 7 As shown, the main processor responds to the standby command, switches to standby mode, and controls the first and third power supply circuits to power off. That is, when the device is in standby mode, all M Normal power supply circuits are powered off. After the main processor stops working, the low-power processor can execute the microphone array power supply control logic B2, which controls the on / off state of the second power supply circuit (i.e., the N Standby power supply circuits) via the GPIO interface.

[0076] In some embodiments, see Figure 7 The microphone array power supply control logic B2 is configured such that, when the main processor is in standby mode, the low-power processor controls the microphone array via the GPIO control interface (e.g., ...). Figure 5 The T8 interface sends a unified high-level signal to the second power supply circuit (i.e., the N-channel Standby power supply circuit). Under the action of the high-level signal, both transistor V20 and MOSFET V19 of the N-channel Standby power supply circuit are turned on, that is, the Standby power supply circuit itself enters the power-on state. In this way, the Standby power supply circuit sends a valid Standby_MIC signal (e.g., Standby_MIC=3.3V) to the first microphone 1201x, thereby powering the first microphone 1201x. Since the Q second microphones 1201y are only connected to the Normal power supply circuit and not to the Standby power supply circuit, when the electronic device switches to standby mode, the Normal power supply circuit does not supply power, so the Q second microphones 1201y are de-energized, and only the N first microphones 1201x are powered on and working. This realizes that only N microphones work when the device is in standby mode. On the one hand, it can ensure the basic sound recording function of the device in standby mode, and on the other hand, it reduces the number of microphones powered and reduces the standby power consumption of the device. This application can automatically adapt the power supply logic according to the operating status of the electronic device and accurately control the working mode of the microphone array.

[0077] In some embodiments, see Figure 7 The microphone array power supply control logic B2 is configured such that when the main processor is in standby mode, the low-power processor sends an on / off control signal to the GPIO based on the usage scenario (e.g., whether the electronic device has voice wake-up function enabled); when the GPIO receives the on / off control signal, it sends a uniform level signal to the second power supply circuit (i.e., the N-channel Standby power supply circuit) so that the N-channel Standby power supply circuit is turned on or off under the action of the level signal, thereby affecting the output of the Standby_MIC signal, and thus controlling whether to supply power to the first microphone 1201x.

[0078] In some embodiments, the low-power processor can obtain the on / off state of the voice wake-up function. If the voice wake-up function is in the off state (OFF), see [link to documentation]. Figure 7The low-power processor can send a first control signal to the GPIO control interface. Upon receiving the first control signal, the control interface sends a low-level MIC_PWR_EN signal (i.e., MIC_PWR_EN=0) to the N-channel Standby power supply circuit. Under the influence of the low-level signal, both transistor V20 and MOSFET V19 in the N-channel Standby power supply circuit are cut off, resulting in Standby_MIC=0V at the circuit's signal output terminal. Therefore, the N first microphones 1201x and Q second microphones 1201y in the microphone array 1201 are all in a power-off state. Thus, when the electronic device 100 is in standby mode, for scenarios where voice wake-up is not required, all microphones in the microphone array 1201 are powered off (i.e., zero-microphone working mode), thereby further reducing the device's standby power consumption.

[0079] In some embodiments, if the voice wake-up function is enabled (ON), see [link to documentation]. Figure 7 The low-power processor can send a second control signal to the GPIO control interface; upon receiving the second control signal, the control interface sends a high-level MIC_PWR_EN signal (i.e., MIC_PWR_EN=1) to the N-channel Standby power supply circuit; under the action of the high-level signal, both transistor V20 and field-effect transistor V19 of the N-channel Standby power supply circuit are turned on, so that the Standby_MIC output by the signal output terminal of the circuit is a preset voltage (e.g., 3.3V), thereby powering the N first microphones 1201x in the microphone array 1201 (i.e., N-microphone working mode), ensuring that the device can be woken up by voice when in standby mode, avoiding the additional power consumption caused by the full microphone working mode, and reducing the standby power consumption of the device.

[0080] Figure 8 This is a schematic diagram of the microphone array power supply control logic C1 provided in some embodiments of this application.

[0081] In some embodiments, such as Figure 8 and Figure 9 As shown, each first microphone 1201x is connected to a first power supply circuit and a second power supply circuit in parallel, and each second microphone 1201y is connected to a third power supply circuit and a fourth power supply circuit. The first and third power supply circuits are both normal power supply circuits, while the second and fourth power supply circuits are both standby power supply circuits.

[0082] In some embodiments, such as Figure 8 and Figure 9As shown, a conducting resistor Rd is connected in series between the first microphone 1201x and the Standby power supply circuit, and the second microphone 1201y, which has a conducting resistor Rd, is disconnected from the Standby power supply circuit. The principle of this design is that when the electronic device 100 is in standby mode, whether the microphone is powered depends not only on the level of MIC_PWR_EN, but also on whether the power supply path between the Standby power supply circuit and the microphone is continuous. The disconnected structure between the second microphone 1201y and the Standby power supply circuit ensures that even if MIC_PWR_EN is a high-level signal, the Standby_MIC signal output by the Standby power supply circuit cannot be transmitted to the second microphone 1201y, thus keeping the second microphone 1201y in a normally de-powered state when the device is in standby mode.

[0083] In some embodiments, the resistance value of the on-resistance Rd is less than the first threshold, for example, the on-resistance Rd is a zero-ohm resistor (OR). In this way, the on-resistance Rd acts as a wire or a closed switch, which can reduce circuit loss and voltage drop, and can maximize the stability of the Standby_MIC power supply signal output by the second power supply circuit to the first microphone 1201x.

[0084] In some embodiments, see Figure 8 When the electronic device 100 is powered on, the low-power processor stops working, and the main processor executes the microphone array power supply control logic C1.

[0085] In some embodiments, see Figure 8 The microphone array power supply control logic C1 is configured as follows: when the main processor detects that the electronic device is in the powered-on state, it provides power to the first power supply circuit and the third power supply circuit (e.g., 3.3_Normal), but does not provide power to the second power supply circuit and the fourth power supply circuit. In this way, all M standby power supply circuits are de-energized and all M normal power supply circuits are energized. Then, the first power supply circuit sends a Normal_MIC signal to the first microphone 1201x, and the third power supply circuit sends a Normal_MIC signal to the second microphone 1201y. Thus, after the electronic device 100 is powered on, by scheduling the Normal power supply circuits of the first microphone 1201x and the second microphone 1201y to be turned on (the Standby power supply circuits are de-energized), the full microphone working mode of the microphone array 1201 is realized.

[0086] Figure 9 This is a schematic diagram of the microphone array power supply control logic C2 provided in some embodiments of this application.

[0087] In some embodiments, such as Figure 9As shown, the main processor responds to the standby command, switches to standby mode, and controls the first and third power supply circuits to power off. That is, when the device is in standby mode, all M Normal power supply circuits are powered off. After the main processor stops working, the low-power processor can execute the microphone array power supply control logic C2. This involves controlling the electronic on / off state of the second and fourth power supply circuits (i.e., the M Standby power supply circuits) via the GPIO interface, and controlling whether to supply power to the microphones based on the physical on / off settings between the Standby power supply circuits and the corresponding microphones.

[0088] In some embodiments, see Figure 9 The microphone array power supply control logic C2 is configured such that, when the main processor is in standby mode, the low-power processor controls the microphone array via the GPIO control interface (e.g., ...). Figure 5 The T8 interface sends a unified high-level signal to the second power supply circuit and the fourth power supply circuit (i.e., the M-channel Standby power supply circuit), so that the second power supply circuit supplies power to the first microphone 1201x under the action of the high-level signal and the on-resistance, and the fourth power supply circuit does not supply power to the second microphone 1201y under the action of the high-level signal and the circuit breaking setting (i.e., keeps it in the power-off state).

[0089] Under the influence of a high-level signal, both transistor V20 and MOSFET V19 of the N-channel second power supply circuit and the Q-channel fourth power supply circuit are turned on, meaning that the Standby power supply circuit itself enters the power-on state. In this way, both the N-channel second power supply circuit and the Q-channel fourth power supply circuit can output a valid Standby_MIC signal (e.g., Standby_MIC = 3.3V).

[0090] Because there is a conduction resistor between the second power supply circuit and the first microphone 1201x, the function of the conduction resistor is to make the power supply line between the second power supply circuit and the first microphone 1201x conduct, forming a closed power supply path. This allows the Standby_MIC signal output by the second power supply circuit to be transmitted to the first microphone 1201x, thereby powering the first microphone 1201x, and thus powering on N first microphones 1201x. The fourth power supply circuit and the second microphone 1201y have an open circuit structure. Under the action of the open circuit structure, the power supply line is interrupted, that is, a closed power supply path cannot be formed, so the Standby_MIC signal output by the fourth power supply circuit cannot reach the second microphone 1201y, and therefore the second microphone 1201y remains in a de-energized state. In this way, only N first microphones 1201x are powered when the device is in standby mode, realizing the N-microphone working mode of the microphone array. On the one hand, it can ensure the basic sound recording function of the device in standby mode, and on the other hand, it can reduce the number of microphones powered and reduce the standby power consumption of the device. This application automatically adapts the power supply logic according to the operating status of the electronic device and precisely controls the working mode of the microphone array.

[0091] Furthermore, at the physical level, the microphone array circuit board connects all M microphones to the standby power supply circuit (including the second power supply circuit and the fourth power supply circuit) used when the device is in standby mode. This allows engineers to test the circuit or install it as needed before it leaves the factory. Specifically, when a microphone is selected as the first microphone 1201x, a series on-resistor Rd is connected between that microphone and its standby power supply circuit, which improves the flexibility of the circuit structure design.

[0092] In some embodiments, see Figure 9 The microphone array power supply control logic C2 is also configured to: when the main processor is in standby mode, the low-power processor sends an on / off control signal to GPIO based on the usage scenario (e.g., whether the electronic device has voice wake-up function enabled); when GPIO receives the on / off control signal, it sends a unified level signal to the second power supply circuit and the fourth power supply circuit (i.e., the M-channel Standby power supply circuit) respectively, so that the M-channel Standby power supply circuit is turned on or off under the action of the level signal, thereby interfering with the output of the Standby_MIC signal.

[0093] In some embodiments, the low-power processor can obtain the on / off state of the voice wake-up function. If the voice wake-up function is in the off state (OFF), see [link to documentation]. Figure 9The low-power processor can send a first control signal to the GPIO control interface. Upon receiving the first control signal, the control interface sends a low-level MIC_PWR_EN signal (i.e., MIC_PWR_EN=0) to the M-channel Standby power supply circuits. Under the influence of the low-level signal, both transistor V20 and MOSFET V19 of the M-channel Standby power supply circuits are cut off, resulting in no valid Standby_MIC output at the circuit's signal output terminal (i.e., Standby_MIC=0V). Consequently, the M-channel Standby power supply circuits themselves are in an off state and cannot supply power to the M microphones. That is, the N first microphones 1201x and Q second microphones 1201y in the microphone array 1201 remain de-energized. Thus, when the electronic device 100 is in standby mode, for scenarios where voice wake-up is not required, all microphones in the microphone array 1201 are de-energized (i.e., zero-microphone working mode), thereby further reducing the device's standby power consumption.

[0094] In some embodiments, if the voice wake-up function is enabled (ON), see [link to documentation]. Figure 9 The low-power processor can send a second control signal to the GPIO control interface. Upon receiving the second control signal, the control interface sends a high-level MIC_PWR_EN signal (i.e., MIC_PWR_EN=1) to the M-channel Standby power supply circuit. Under the influence of the high-level signal, both transistor V20 and MOSFET V19 of the M-channel Standby power supply circuit are turned on, enabling the circuit's signal output terminal to output a valid Standby_MIC signal (e.g., Standby_MIC=3.3V). Thus, under the action of the on-resistance, N first microphones 1201x are powered, while Q second microphones 1201y remain de-powered. This ensures that the device can be woken up by voice during standby, avoids the additional power consumption caused by the full-microphone working mode, and reduces the device's standby power consumption.

[0095] Figure 10 This is a schematic diagram of the structure of a microphone array circuit board provided in some embodiments of this application.

[0096] In some embodiments, such as Figure 10 As shown, the microphone array circuit board carries the first and second power supply circuits connected to the first microphone 1201x, and the third and fourth power supply circuits connected to the second microphone 1201y. A resistor mounting position is provided between each microphone and its connected standby power supply circuit; this resistor mounting position is the physical space for installing a conducting resistor Rd. Thus, reserving resistor mounting positions for M microphones in the microphone array circuit board Bom is similar to creating mounting space for "batteries." Once the "battery" (equivalent to a conducting resistor) is installed in the corresponding mounting position, the microphone is powered and operates.

[0097] Before testing or shipping, a series on-resistor Rd can be connected to the first microphone that is powered in standby mode (i.e., the upper component is turned on), while the second microphone that is not powered in standby mode is not connected in series with an on-resistor (forming an open circuit). This allows for more efficient and convenient configuration of the standby power supply circuits for each microphone. Once the basic architecture of the microphone array's power supply circuit under power-on / standby conditions is set up, no changes are needed. Only the upper component on-resistor Rd is required to establish the standby power supply path; there is no need to install or remove the standby power supply circuit, thus improving production and testing efficiency.

[0098] In some embodiments, such as Figure 10 As shown, assume that the microphone controlled by modules U1 and U3 is the first microphone 1201x, and the microphone controlled by modules U2 and U4 is the second microphone 1201y. A conducting resistor Rd is installed in the first resistor mounting position between the first microphone 1201x and the second power supply circuit (Standby power supply circuit). The first end of the conducting resistor Rd is connected to the signal output terminal of the second power supply circuit, and the second end of the conducting resistor Rd is connected to the power input terminal (i.e., the Vdd pin) of the first microphone. This completes the conduction of the resistor, activating the power supply path of the first microphone 1201x, allowing the Standby_MIC signal output by the second power supply circuit to directly reach the first microphone 1201x through the conducting resistor, thus powering the first microphone 1201x when the device is in standby mode.

[0099] In some embodiments, the resistance value of the on-resistance Rd is less than the first threshold, for example, the on-resistance Rd is a zero-ohm resistor (OR). In this way, the on-resistance Rd acts as a wire or a closed switch, which can reduce circuit loss and voltage drop, and can maximize the stability of the Standby_MIC power supply signal output by the second power supply circuit to the first microphone 1201x.

[0100] In some embodiments, the circuit-breaking structure can also be configured such that a high-impedance resistor is connected in series at the second resistor mounting position between the second microphone 1201y and the fourth power supply circuit (Standby power supply circuit), so that the voltage / current of the Standby_MIC signal output by the fourth power supply circuit cannot drive the second microphone 1201y to work, thus achieving a similar "circuit-breaking" effect. This approach increases additional hardware costs and circuit power consumption.

[0101] In some embodiments, such as Figure 10As shown, the second resistor mounting position can be left unused without a conducting resistor Rd, thus forming an open circuit structure. This structure is equivalent to creating a physical "breakpoint" (zero power consumption) on the power supply line of the second microphone 1201y. This eliminates the need for additional hardware overhead, allows the microphone array to be completely powered off when the device is in standby mode, reduces standby power consumption, and prevents additional load or interference caused by poor soldering, leaks, or other factors.

[0102] In some embodiments, such as Figure 10 As shown, the microphone array circuit board includes signal processing modules for each of the M microphones. Taking M=4 as an example, the signal processing modules are U1, U2, U3, and U4, which are used to implement functions such as power supply to the microphone array, audio signal acquisition, and processing. The following explanation uses U1 as an example.

[0103] In some embodiments, such as Figure 10 As shown, the U1 module includes 5 pins, where pin 1 is the Data pin, pin 2 is the L / R (left / right channel) pin, pin 3 is the ground (GND) pin, pin 4 is the CLK (clock) pin, and pin 5 is the Vdd (power) pin.

[0104] In some embodiments, such as Figure 10 As shown, the Normal power supply circuit and the Standby power supply circuit are connected in parallel and are respectively connected to the Vdd pin. Module U1 is used for signal processing of the first microphone 1201x, so the resistor mounting bit between the Standby power supply circuit and the Vdd pin in U1 is connected in series with an on-resistance Rd. Module U2 is used for signal processing of the second microphone 1201y, so the resistor mounting bit between the Standby power supply circuit and the Vdd pin in U2 is left empty to form an open circuit structure.

[0105] In some embodiments, such as Figure 10 As shown, capacitors C1, C2, C3, and C4 are filter capacitors, which can be used for decoupling and noise reduction, suppressing high-frequency noise on the power line, and ensuring power supply stability. This application mainly focuses on the power supply circuit structure and power supply control logic connected to the Vdd pin; other structures and layouts of the microphone array circuit board are not limited.

[0106] In some embodiments, this application provides a microphone array power supply control method operating in an electronic device, comprising: after the electronic device is powered on, a main processor controls a first power supply circuit to supply power to a first microphone, controls a third power supply circuit to supply power to a second microphone, and controls the second power supply circuit to be powered off; the main processor, in response to a standby command, switches to a standby state and controls the first and third power supply circuits to be powered off; while the main processor is in a standby state, a low-power processor sends a high-level signal to the second power supply circuit through a control interface, so that the second power supply circuit switches to a powered-on state and supplies power to the first microphone under the action of the high-level signal. The specific implementation of this method can be referred to the aforementioned method based on... Figure 6 and Figure 7 The provided embodiments will not be described in detail here.

[0107] In some embodiments, this application also provides another microphone array power supply control method operating in an electronic device, comprising: after the electronic device is powered on, a main processor controls a first power supply circuit to supply power to a first microphone, controls a third power supply circuit to supply power to a second microphone, and controls the second and fourth power supply circuits to be powered off; the main processor, in response to a standby command, switches to a standby state and controls the first and third power supply circuits to be powered off; while the main processor is in a standby state, a low-power processor sends high-level signals to the second and fourth power supply circuits respectively through a control interface, so that the second power supply circuit supplies power to the first microphone under the action of a high-level signal and a conduction resistance, and that the fourth power supply circuit does not supply power to the second microphone under the action of a high-level signal and a circuit breaker setting. The specific implementation of this method can be referred to the aforementioned method based on... Figure 8 and Figure 9 The provided embodiments will not be described in detail here.

[0108] In some embodiments, a computer storage medium is also provided, which may store a program. When the computer storage medium is configured in the electronic device 100, the program, when executed, may include the program steps involved in the microphone array power supply control method in the above embodiments. The computer storage medium may be a magnetic disk, optical disk, read-only memory (ROM), or random access memory (RAM), etc.

[0109] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

[0110] For ease of explanation, the above description has been provided in conjunction with specific embodiments. However, the foregoing exemplary discussion is not intended to be exhaustive or to limit the embodiments to the specific forms disclosed above. Various modifications and variations can be made based on the foregoing teachings. The selection and description of the above embodiments are for the purpose of better explaining the contents of this disclosure, thereby enabling those skilled in the art to better utilize the described embodiments.

Claims

1. An electronic device, characterized in that, include: A microphone array, including at least one first microphone and at least one second microphone, wherein the first microphone is connected to a first power supply circuit and a second power supply circuit connected in parallel; The second microphone is connected to a third power supply circuit; The main processor is configured to: after the electronic device is powered on, control the first power supply circuit to supply power to the first microphone, control the third power supply circuit to supply power to the second microphone, and control the second power supply circuit to power off. The main processor is also configured to: switch to standby mode in response to a standby command, and control the first power supply circuit and the third power supply circuit to disconnect from power; A low-power processor is connected to the second power supply circuit via a control interface; the low-power processor is configured to send a high-level signal to the second power supply circuit via the control interface when the main processor is in standby mode, so that the second power supply circuit switches to a power-on state under the action of the high-level signal and supplies power to the first microphone.

2. The electronic device according to claim 1, characterized in that, Before sending a high-level signal to the second power supply circuit through the control interface, the low-power processor is further configured to: Obtain the on / off status of the voice wake-up function; wherein, the voice wake-up function refers to the function of the low-power processor responding to the voice wake-up command and controlling the electronic device to turn on when the electronic device is in standby mode; If the voice wake-up function is off, a low-level signal is sent to the second power supply circuit through the control interface so that the second power supply circuit remains powered off under the action of the low-level signal.

3. The electronic device according to claim 2, characterized in that, The low-power processor sends a high-level signal to the second power supply circuit through the control interface, specifically configured as follows: If the voice wake-up function is enabled, a high-level signal is sent to the second power supply circuit through the control interface.

4. An electronic device, characterized in that, include: A microphone array includes at least one first microphone and at least one second microphone. The first microphone is connected to a first power supply circuit and a second power supply circuit in parallel, and a conduction resistor is connected in series between the first microphone and the second power supply circuit. The second microphone is connected to a third power supply circuit and a fourth power supply circuit in parallel, and the second microphone and the fourth power supply circuit are in an open circuit structure. The main processor is configured to, after the electronic device is powered on, control the first power supply circuit to power the first microphone, control the third power supply circuit to power the second microphone, and control the second power supply circuit and the fourth power supply circuit to power off. The main processor is also configured to: switch to standby mode in response to a standby command, and control the first power supply circuit and the third power supply circuit to disconnect from power; A low-power processor is connected to the second power supply circuit and the fourth power supply circuit via a control interface. The low-power processor is configured to: when the main processor is in standby mode, send high-level signals to the second power supply circuit and the fourth power supply circuit respectively via the control interface, so that the second power supply circuit supplies power to the first microphone under the action of the high-level signal and the on-resistance, and so that the fourth power supply circuit does not supply power to the second microphone under the action of the high-level signal and the circuit breaker setting.

5. The electronic device according to claim 4, characterized in that, Before sending high-level signals to the second power supply circuit and the fourth power supply circuit respectively through the control interface, the low-power processor is further configured to: Obtain the on / off status of the voice wake-up function; wherein, the voice wake-up function refers to the function of the low-power processor responding to the voice wake-up command and controlling the electronic device to turn on when the electronic device is in standby mode; If the voice wake-up function is in the off state, then a low-level signal is sent to the second power supply circuit and the fourth power supply circuit respectively through the control interface, so that the second power supply circuit and the fourth power supply circuit remain in the power-off state under the action of the low-level signal.

6. The electronic device according to claim 5, characterized in that, The low-power processor is specifically configured to send high-level signals to the second power supply circuit and the fourth power supply circuit respectively through the control interface as follows: If the voice wake-up function is enabled, a high-level signal is sent to the second power supply circuit and the fourth power supply circuit respectively through the control interface.

7. The electronic device according to claim 4, characterized in that, The electronic device further includes a microphone array circuit board, which carries the first power supply circuit and the second power supply circuit connected to the first microphone, and carries the third power supply circuit and the fourth power supply circuit connected to the second microphone. The microphone array circuit board has a corresponding resistor mounting point for each microphone in the microphone array; The conducting resistor is installed in the first resistor mounting position between the first microphone and the second power supply circuit. The first end of the conducting resistor is connected to the output terminal of the second power supply circuit, and the second end of the conducting resistor is connected to the power input terminal of the first microphone. The resistance value of the conducting resistor is less than a first threshold.

8. The electronic device according to claim 7, characterized in that, The circuit breaking structure is that the second resistor mounting position between the second microphone and the fourth power supply circuit is left vacant.

9. A method for controlling the power supply of a microphone array in an electronic device, the electronic device comprising a microphone array, a main processor, and a low-power processor, wherein the microphone array comprises at least one first microphone and at least one second microphone, the first microphone being connected to a first power supply circuit and a second power supply circuit connected in parallel; the second microphone being connected to a third power supply circuit, characterized in that... The method includes: After the electronic device is powered on, the main processor controls the first power supply circuit to supply power to the first microphone, controls the third power supply circuit to supply power to the second microphone, and controls the second power supply circuit to power off. The main processor responds to the standby command, switches to standby mode, and controls the first power supply circuit and the third power supply circuit to disconnect from power. When the main processor is in standby mode, the low-power processor sends a high-level signal to the second power supply circuit through the control interface, so that the second power supply circuit switches to the power-on state under the action of the high-level signal and supplies power to the first microphone.

10. A method for controlling the power supply of a microphone array in an electronic device, the electronic device comprising a microphone array, a main processor, and a low-power processor, wherein the microphone array comprises at least one first microphone and at least one second microphone, the first microphone being connected to a first power supply circuit and a second power supply circuit in parallel, and a conduction resistor being connected in series between the first microphone and the second power supply circuit; the second microphone being connected to a third power supply circuit and a fourth power supply circuit in parallel, and the second microphone being connected to the fourth power supply circuit in an open-circuit structure, characterized in that, The method includes: After the electronic device is powered on, the main processor controls the first power supply circuit to supply power to the first microphone, controls the third power supply circuit to supply power to the second microphone, and controls the second power supply circuit and the fourth power supply circuit to be powered off. The main processor responds to the standby command, switches to standby mode, and controls the first power supply circuit and the third power supply circuit to disconnect from power. When the main processor is in standby mode, the low-power processor sends high-level signals to the second power supply circuit and the fourth power supply circuit through the control interface, so that the second power supply circuit supplies power to the first microphone under the action of the high-level signal and the on-resistance, and the fourth power supply circuit does not supply power to the second microphone under the action of the high-level signal and the circuit breaking setting.

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