Audio circuit and electronic equipment

Abstract

The utility model relates to an audio circuit and electronic equipment. The audio circuit comprises a microphone used for collecting a first audio signal; the loudspeaker is used for collecting the second audio signal and playing the third audio signal; a control circuit; and the signal processing circuit is electrically connected with the microphone, the loudspeaker and the control circuit, and the signal processing circuit is used for processing the first audio signal and the second audio signal, transmitting the processed first audio signal and the processed second audio signal to the control circuit, processing the audio signal output by the control circuit into a third audio signal, and transmitting the third audio signal to the loudspeaker. The loudspeaker can collect the second audio signal and can play the third audio signal, so that the loudspeaker can be reused in the scene of collecting the audio signals. By multiplexing the loudspeaker, the microphone and the loudspeaker respectively collect the first audio signal and the second audio signal with different dynamic ranges, so that the dynamic range of the collected audio signals is increased, and the audio recording effect is improved.

Description

Technical Field

[0001] The present disclosure relates to the field of audio technologies, and particularly to an audio circuit and an electronic device. Background Art

[0002] In an electronic device, an audio signal is collected by a microphone and played by a speaker. However, due to the small dynamic range of the audio signal collected by the microphone, there is a problem of distortion of the audio signal, resulting in poor audio recording effects. Summary of the Utility Model

[0003] To overcome the problems existing in the related art, the present disclosure provides an audio circuit and an electronic device.

[0004] According to a first aspect of the present disclosure, there is provided an audio circuit, the audio circuit comprising:

[0005] A microphone for collecting a first audio signal;

[0006] A speaker for collecting a second audio signal and playing a third audio signal;

[0007] A control circuit;

[0008] A signal processing circuit electrically connected to the microphone, the speaker and the control circuit, the signal processing circuit being configured to process the first audio signal and the second audio signal and then transmit them to the control circuit, and to process the audio signal output by the control circuit into the third audio signal and then transmit it to the speaker.

[0009] In some embodiments of the present disclosure, the signal processing circuit comprises:

[0010] A first signal processing sub-circuit, a first end of the first signal processing sub-circuit being electrically connected to the microphone, a second end of the first signal processing sub-circuit being electrically connected to a first end of the control circuit, the first signal processing sub-circuit being configured to process the first audio signal;

[0011] A second signal processing sub-circuit, a first end of the second signal processing sub-circuit being electrically connected to the speaker, a second end of the second signal processing sub-circuit being electrically connected to a second end of the control circuit, the second signal processing sub-circuit being configured to process the audio signal output by the control circuit into the third audio signal;

[0012] A switch circuit electrically connected between the speaker and the control circuit, the switch circuit being configured to enable or stop the transmission of the second audio signal to the control circuit.

[0013] In some embodiments of the present disclosure, the switching circuit includes:

[0014] A first transistor electrically connected between the first end of the speaker and the control circuit;

[0015] A second transistor electrically connected between the second end of the speaker and the control circuit.

[0016] In some embodiments of the present disclosure, the first signal processing sub-circuit includes:

[0017] An encoding and decoding circuit, a first end of the encoding and decoding circuit is electrically connected to the microphone, a second end of the encoding and decoding circuit is electrically connected to a first end of the control circuit, and a third end of the encoding and decoding circuit is electrically connected to a first end of the switching circuit;

[0018] Wherein, a second end of the switching circuit is electrically connected to the speaker.

[0019] In some embodiments of the present disclosure, the third end of the encoding and decoding circuit includes a first sub-end and a second sub-end; the switching circuit includes:

[0020] A first transistor electrically connected between the first end of the speaker and the first sub-end of the encoding and decoding circuit;

[0021] A second transistor electrically connected between the second end of the speaker and the second sub-end of the encoding and decoding circuit.

[0022] In some embodiments of the present disclosure, the second signal processing sub-circuit includes:

[0023] A power amplifier circuit, a first end of the power amplifier circuit is electrically connected to the speaker, a second end of the power amplifier circuit is electrically connected to a second end of the control circuit, and a third end of the power amplifier circuit is electrically connected to a first end of the switching circuit;

[0024] Wherein, a second end of the switching circuit is electrically connected to the speaker.

[0025] In some embodiments of the present disclosure, the power amplifier circuit includes a monitoring unit; the switching circuit includes:

[0026] A first transistor electrically connected between the first end of the speaker and the first end of the monitoring unit;

[0027] A second transistor electrically connected between the second end of the speaker and the second end of the monitoring unit.

[0028] In some embodiments of the present disclosure, the signal processing circuit further includes:

[0029] A third signal processing sub - circuit, which is electrically connected between the control circuit and the switch circuit; a first end of the third signal processing sub - circuit is electrically connected to a first end of the switch circuit, a second end of the third signal processing sub - circuit is electrically connected to a third end of the control circuit, and the third signal processing sub - circuit is configured to process the second audio signal;

[0030] Wherein, a second end of the switch circuit is electrically connected to the speaker.

[0031] In some embodiments of the present disclosure, the third signal processing sub - circuit includes:

[0032] An operational amplifier circuit, which is electrically connected between the switch circuit and the control circuit; a first end of the operational amplifier circuit is electrically connected to a first end of the switch circuit;

[0033] An analog - to - digital conversion circuit, which is electrically connected between the operational amplifier circuit and the control circuit; a first end of the analog - to - digital conversion circuit is electrically connected to a second end of the operational amplifier circuit, and a second end of the analog - to - digital conversion circuit is electrically connected to a third end of the control circuit.

[0034] In some embodiments of the present disclosure, the switch circuit includes:

[0035] A first transistor, which is electrically connected between a first end of the speaker and a first input terminal of the operational amplifier circuit;

[0036] A second transistor, which is electrically connected between a second end of the speaker and a second input terminal of the operational amplifier circuit.

[0037] In some embodiments of the present disclosure, the second signal processing sub - circuit is electrically connected to a second end of the control circuit through an integrated circuit built - in audio bus, and the third signal processing sub - circuit is electrically connected to a third end of the control circuit through a pulse density modulation bus.

[0038] In some embodiments of the present disclosure, the microphone includes a capacitive microphone, and the speaker includes a dynamic - coil speaker.

[0039] In some embodiments of the present disclosure, the number of both the microphones and the speakers is multiple; the multiple microphones are respectively arranged on two opposite sides of the electronic device; the multiple speakers are respectively arranged on two opposite sides of the electronic device; some of the microphones and the speakers are located on one side of the electronic device.

[0040] According to a second aspect of the present disclosure, there is provided an electronic device, which includes the audio circuit as described in any one of the above.

[0041] The technical solutions provided by the embodiments of the present disclosure may include the following beneficial effects:

[0042] The audio circuit includes a microphone, a speaker, a control circuit, and a signal processing circuit. The signal processing circuit is electrically connected to the microphone, the speaker, and the control circuit. Since the speaker can both collect a second audio signal and play a third audio signal, the speaker can be reused in the scenario of collecting audio signals. By reusing the speaker, the microphone and the speaker respectively collect a first audio signal and a second audio signal with different dynamic ranges, increasing the dynamic range of the collected audio signals, thereby improving the audio recording effect. At the same time, since the microphone and the speaker are disposed at different positions in the electronic device, collecting audio signals through the microphone and the speaker can make the recorded audio have a surrounding effect, thereby further improving the audio recording effect.

[0043] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] The accompanying drawings herein are incorporated into the specification and form a part of the specification, showing embodiments consistent with the present disclosure, and are used together with the specification to explain the principles of the present disclosure.

[0045] Figure 1 is a schematic structural diagram of an audio circuit provided by an exemplary embodiment of the present disclosure;

[0046] Figure 2 is a schematic structural diagram of an audio circuit provided by another exemplary embodiment of the present disclosure;

[0047] Figure 3 is a schematic structural diagram of an audio circuit provided by another exemplary embodiment of the present disclosure;

[0048] Figure 4 is a schematic structural diagram of an audio circuit provided by another exemplary embodiment of the present disclosure;

[0049] Figure 5 is a schematic structural diagram of an audio circuit provided by another exemplary embodiment of the present disclosure;

[0050] Figure 6 is a schematic structural diagram of an audio circuit provided by another exemplary embodiment of the present disclosure;

[0051] Figure 7 is a schematic structural diagram of an audio circuit provided by another exemplary embodiment of the present disclosure;

[0052] Figure 8 It is a schematic structural diagram of an audio circuit provided by another exemplary embodiment of the present disclosure;

[0053] Figure 9 It is a schematic structural diagram of an audio circuit provided by another exemplary embodiment of the present disclosure;

[0054] Figure 10 It is a schematic structural diagram of an audio circuit provided by another exemplary embodiment of the present disclosure;

[0055] Figure 11 It is a schematic structural diagram of an audio circuit provided by another exemplary embodiment of the present disclosure;

[0056] Figure 12 It is a schematic structural diagram of an audio circuit provided by another exemplary embodiment of the present disclosure;

[0057] Figure 13 It is a system block diagram of an electronic device provided by an exemplary embodiment of the present disclosure.

[0058] In the figure:

[0059] 10 - Microphone; 11 - First capacitive microphone; 12 - Second capacitive microphone; 20 - Speaker; 21 - First moving - coil speaker; 22 - Second moving - coil speaker; 30 - Control circuit; 40 - Signal processing circuit; 41 - First signal processing sub - circuit; 42 - Second signal processing sub - circuit; 43 - Switch circuit; 44 - Third signal processing sub - circuit; 400 - Electronic device; 402 - Processing component; 404 - Memory; 406 - Power supply component; 408 - Multimedia component; 410 - Audio component; 411 - Codec circuit; 412 - Input / output interface; 414 - Sensor component; 416 - Communication component; 420 - Processor; 421 - Power amplifier circuit; 441 - Operational amplifier circuit; 442 - Analog - to - digital conversion circuit; 4211 - Monitoring unit; T1 - First transistor; T2 - Second transistor; T3 - Third transistor; T4 - Fourth transistor; CO - Codec; SPA1 - First intelligent power amplifier; SPA2 - Second intelligent power amplifier; AMP1 - First operational amplifier; AMP2 - Second operational amplifier; ADC1 - First Σ - Δ analog - to - digital converter; ADC2 - Second Σ - Δ analog - to - digital converter. Detailed implementation manners

[0060] Exemplary embodiments will be described in detail herein, and examples thereof are shown in the accompanying drawings. When the following description refers to the accompanying drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. On the contrary, they are merely examples of devices and methods consistent with some aspects of the present invention as detailed in the appended claims. It should also be understood that the term "and / or" used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.

[0061] In an electronic device, an audio signal is collected by a microphone and played by a speaker. For example, the microphone converts an external sound signal into an electrical signal to collect the audio signal, and the speaker converts the electrical signal into a sound signal to play the audio signal. Due to the limited volume of the electronic device, the limited number of microphones results in a small dynamic range of the collected audio signal, and there is a problem of poor audio recording effect.

[0062] In the related art, an audio circuit is provided. Each microphone in the audio circuit collects an audio signal through two analog-to-digital converters, and can synchronously sample the audio signal to improve the resolution of the audio signal, thereby increasing the dynamic range of the audio signal. However, due to the limited increase in the dynamic range caused by synchronous sampling, there is still a problem of audio signal distortion, resulting in a poor audio recording effect.

[0063] Based on this, the present disclosure provides an audio circuit. Since the dynamic ranges of the audio signals collected by the speaker and the microphone are different, by multiplexing the audio signal collected by the speaker, the dynamic range of the audio signal is increased to improve the audio recording effect.

[0064] An exemplary embodiment of the present disclosure provides an audio circuit, as Figure 1 shown, the audio circuit includes a microphone 10, a speaker 20, a control circuit 30, and a signal processing circuit 40. The microphone 10 is used to collect a first audio signal. The speaker 20 is used to collect a second audio signal and play a third audio signal. The signal processing circuit 40 is electrically connected to the microphone 10, the speaker 20, and the control circuit 30. The signal processing circuit 40 is used to process the first audio signal and the second audio signal and transmit them to the control circuit 30, and process the audio signal output by the control circuit 30 into a third audio signal and transmit it to the speaker 20.

[0065] In this embodiment, the audio circuit includes a microphone, a speaker, a control circuit, and a signal processing circuit. The signal processing circuit is electrically connected to the microphone, the speaker, and the control circuit. Since the speaker can both collect the second audio signal and play the third audio signal, the speaker can be reused in the scenario of collecting audio signals. By reusing the speaker, the microphone and the speaker respectively collect the first audio signal and the second audio signal with different dynamic ranges, increasing the dynamic range of the collected audio signals, thereby improving the audio recording effect. At the same time, since the microphone and the speaker are arranged at different positions in the electronic device, collecting audio signals through the microphone and the speaker can make the recorded audio have a surround effect, thereby further improving the audio recording effect.

[0066] Exemplarily, the control circuit 30 includes a processor. The processor can be a separate processor in the audio circuit or the processor of the electronic device.

[0067] Exemplarily, after obtaining the processed first audio signal and second audio signal, the control circuit 30 can synthesize the processed audio signals as the collected audio signal.

[0068] In one embodiment, as Figure 2 shown, the signal processing circuit 40 includes a first signal processing sub-circuit 41, a second signal processing sub-circuit 42, and a switch circuit 43. The first end of the first signal processing sub-circuit 41 is electrically connected to the microphone 10, the second end of the first signal processing sub-circuit 41 is electrically connected to the first end of the control circuit 30, and the first signal processing sub-circuit 41 is used to process the first audio signal. The first end of the second signal processing sub-circuit 42 is electrically connected to the speaker 20, the second end of the second signal processing sub-circuit 42 is electrically connected to the second end of the control circuit 30, and the second signal processing sub-circuit 42 is used to process the audio signal output by the control circuit 30 into a third audio signal. The switch circuit 43 is electrically connected between the speaker 20 and the control circuit 30, and the switch circuit 43 is used to transmit or stop transmitting the second audio signal to the control circuit 30.

[0069] In this embodiment, the first signal processing sub - circuit can process the first audio signal and transmit it to the control circuit to achieve the acquisition of the first audio signal. The second signal processing sub - circuit can convert the audio signal output by the control circuit into a third audio signal and transmit it to the speaker for playback to achieve the playback of the third audio signal. When it is necessary to reuse the speaker to collect the second audio signal, the control switch circuit is turned on to achieve the collection of the second audio signal. When it is necessary for the speaker to play the third audio signal or when it is not necessary to collect the second audio signal, the control switch circuit is turned off to avoid collecting invalid audio signals. By processing the audio signal through the first signal processing sub - circuit, the second signal processing sub - circuit and the switch circuit, the speaker can be reused in different scenarios, thus improving the reliability of the audio circuit.

[0070] Exemplarily, the control circuit 30 can control the on - off of the switch circuit 43.

[0071] In one embodiment, as Figure 3 shown, the switch circuit 43 includes a first transistor T1 and a second transistor T2. The first transistor T1 is electrically connected between the first end of the speaker 20 and the control circuit 30. The second transistor T2 is electrically connected between the second end of the speaker 20 and the control circuit 30.

[0072] In this embodiment, due to the low loss and easy control of the transistor, using the transistor to control whether the second audio signal is transmitted reduces the loss of the audio circuit and the complexity of audio circuit control. And since the two transistors are respectively electrically connected between the first end of the speaker and the control circuit and between the second end of the speaker and the control circuit, differential second audio signals can be transmitted to the control circuit, thus improving the audio recording effect.

[0073] Exemplarily, when the first transistor T1 is an N - type field - effect transistor, the source of the first transistor T1 is electrically connected to the control circuit 30, the drain of the first transistor T1 is electrically connected to the first end of the speaker 20, and the gate of the first transistor T1 is electrically connected to the control circuit 30.

[0074] Exemplarily, when the second transistor T2 is an N - type field - effect transistor, the source of the second transistor T2 is electrically connected to the control circuit 30, the drain of the second transistor T2 is electrically connected to the second end of the speaker 20, and the gate of the second transistor T2 is electrically connected to the control circuit 30.

[0075] In one embodiment, as Figure 4As shown, the first signal processing sub-circuit 41 includes an encoding and decoding circuit 411. The first end of the encoding and decoding circuit 411 is electrically connected to the microphone 10, the second end of the encoding and decoding circuit 411 is electrically connected to the first end of the control circuit 30, and the third end of the encoding and decoding circuit 411 is electrically connected to the first end of the switch circuit 43. Among them, the second end of the switch circuit 43 is electrically connected to the speaker 20.

[0076] In this embodiment, since the encoding and decoding circuit has the functions of amplifying and converting audio signals, the first audio signal collected by the microphone is amplified and converted by the encoding and decoding circuit, so that the control circuit can recognize it. And, the second audio signal collected by the speaker is amplified and converted by the encoding and decoding circuit, so that the control circuit can recognize it. By multiplexing the encoding and decoding circuit to process the second audio signal, the addition of extra circuits is avoided, thus reducing the complexity of the audio circuit structure.

[0077] In one embodiment, as Figure 5 shown, the third end of the encoding and decoding circuit 411 includes a first sub-end and a second sub-end. The switch circuit 43 includes a first transistor T1 and a second transistor T2. The first transistor T1 is electrically connected between the first end of the speaker 20 and the first sub-end of the encoding and decoding circuit 411. The second transistor T2 is electrically connected between the second end of the speaker 20 and the second sub-end of the encoding and decoding circuit 411.

[0078] In this embodiment, since the loss of the transistor is low and it is easy to control, the transmission of the second audio signal is controlled by the transistor, reducing the loss of the audio circuit and the complexity of the audio circuit control. And, since the two transistors are respectively electrically connected between the first end of the speaker and the first sub-end of the encoding and decoding circuit and between the second end of the speaker and the second sub-end of the encoding and decoding circuit, the differential second audio signal can be transmitted to the encoding and decoding circuit to be transmitted to the control circuit, thereby improving the audio recording effect.

[0079] Exemplarily, the encoding and decoding circuit may include a codec.

[0080] Exemplarily, when the first transistor T1 is an N-type field effect transistor, the source of the first transistor T1 is electrically connected to the first sub-end of the encoding and decoding circuit 411, the drain of the first transistor T1 is electrically connected to the first end of the speaker 20, and the gate of the first transistor T1 is electrically connected to the control circuit 30.

[0081] Exemplarily, when the second transistor T2 is an N-type field effect transistor, the source of the second transistor T2 is electrically connected to the second sub-end of the encoding and decoding circuit 411, the drain of the second transistor T2 is electrically connected to the second end of the speaker 20, and the gate of the second transistor T2 is electrically connected to the control circuit 30.

[0082] In one embodiment, as Figure 6 shown, the second signal processing sub-circuit 42 includes a power amplifier circuit 421. The first end of the power amplifier circuit 421 is electrically connected to the speaker 20, the second end of the power amplifier circuit 421 is electrically connected to the second end of the control circuit 30, and the third end of the power amplifier circuit 421 is electrically connected to the first end of the switch circuit 43. Among them, the second end of the switch circuit 43 is electrically connected to the speaker 20.

[0083] In this embodiment, since the power amplifier circuit has the functions of amplifying and converting the audio signal, the audio signal output by the control circuit is amplified and converted into a third audio signal through the power amplifier circuit, so that the speaker can play the third audio signal. And, the second audio signal collected by the speaker is amplified and converted through the power amplifier circuit, so that the control circuit can identify it. By multiplexing the power amplifier circuit to process the second audio signal, additional circuits are avoided, thereby reducing the complexity of the audio circuit structure.

[0084] Exemplarily, the power amplifier circuit 421 may include a Smart Power Amplifier (Smart PA).

[0085] In one embodiment, as Figure 7 shown, the power amplifier circuit 421 includes a monitoring unit 4211. The switch circuit 43 includes a first transistor T1 and a second transistor T2. The first transistor T1 is electrically connected between the first end of the speaker 20 and the first end of the monitoring unit 4211. The second transistor T2 is electrically connected between the second end of the speaker 20 and the second end of the monitoring unit 4211.

[0086] In this embodiment, since the loss of the transistor is low and it is easy to control, the transmission of the second audio signal is controlled by the transistor, reducing the loss of the audio circuit and the complexity of the audio circuit control. And, since the two transistors are respectively electrically connected between the first end of the speaker and the first end of the monitoring unit and between the second end of the speaker and the second end of the monitoring unit, the differential second audio signal can be transmitted to the monitoring unit and then transmitted to the control circuit, thereby improving the effect of audio recording.

[0087] Exemplarily, the monitoring unit 4211 can be used to monitor current and voltage.

[0088] Exemplarily, when the first transistor T1 is an N-type field effect transistor, the source of the first transistor T1 is electrically connected to the first end of the monitoring unit 4211, the drain of the first transistor T1 is electrically connected to the first end of the speaker 20, and the gate of the first transistor T1 is electrically connected to the control circuit 30.

[0089] Exemplarily, when the second transistor T2 is an N-type field effect transistor, the source of the second transistor T2 is electrically connected to the second end of the monitoring unit 4211, the drain of the second transistor T2 is electrically connected to the second end of the speaker 20, and the gate of the second transistor T2 is electrically connected to the control circuit 30.

[0090] In one embodiment, as Figure 8 shown, the signal processing circuit 40 further includes a third signal processing sub-circuit 44. The third signal processing sub-circuit 44 is electrically connected between the control circuit 30 and the switch circuit 43. The first end of the third signal processing sub-circuit 44 is electrically connected to the first end of the switch circuit 43, the second end of the third signal processing sub-circuit 44 is electrically connected to the third end of the control circuit 30, and the third signal processing sub-circuit 44 is used to process the second audio signal. Among them, the second end of the switch circuit 43 is electrically connected to the speaker 20.

[0091] In this embodiment, by adding the third signal processing sub-circuit, the third signal processing sub-circuit can process the second audio signal alone to avoid interference in the processing of the second audio signal, thereby improving the reliability of audio processing. And, since the performance of the third signal processing sub-circuit for processing signals can be set separately, the audio processing is not limited by the performance of the first signal processing sub-circuit and the second signal processing sub-circuit, thereby improving the effect of audio recording.

[0092] In one embodiment, as Figure 9 shown, the third signal processing sub-circuit 44 includes an operational amplifier circuit 441 and an analog-to-digital conversion circuit 442. The operational amplifier circuit 441 is electrically connected between the switch circuit 43 and the control circuit 30. The first end of the operational amplifier circuit 441 is electrically connected to the first end of the switch circuit 43. The analog-to-digital conversion circuit 442 is electrically connected between the operational amplifier circuit 441 and the control circuit 30. The first end of the analog-to-digital conversion circuit 442 is electrically connected to the second end of the operational amplifier circuit 441, and the second end of the analog-to-digital conversion circuit 442 is electrically connected to the third end of the control circuit 30.

[0093] In this embodiment, the second audio signal collected by the speaker can be amplified by the operational amplifier circuit, and the second audio signal can be converted from an analog signal to a digital signal by the analog-to-digital conversion circuit, so that the control circuit can recognize it. Through the operational amplifier circuit and the analog-to-digital conversion circuit, the second audio signal can be processed as expected, avoiding the second audio signal being unrecognizable, thereby improving the reliability of the audio circuit.

[0094] Exemplarily, the analog-to-digital conversion circuit 442 may include a Σ-Δ analog-to-digital converter.

[0095] In one embodiment, the switch circuit 43 includes a first transistor T1 and a second transistor T2. The first transistor T1 is electrically connected between the first end of the speaker 20 and the first input terminal of the operational amplifier circuit 441. The second transistor T2 is electrically connected between the second end of the speaker 20 and the second input terminal of the operational amplifier circuit 441.

[0096] In this embodiment, since the loss of the transistor is low and it is easy to control, the transistor is used to control whether the second audio signal is transmitted, reducing the loss of the audio circuit and the complexity of the audio circuit control. Moreover, since the two transistors are respectively electrically connected between the first end of the speaker and the first end of the operational amplifier circuit and between the second end of the speaker and the second end of the operational amplifier circuit, the differential second audio signal can be transmitted to the operational amplifier circuit and then to the control circuit, thereby improving the audio recording effect.

[0097] Exemplarily, when the first transistor T1 is an N-type field-effect transistor, the source electrode of the first transistor T1 is electrically connected to the first input terminal of the operational amplifier circuit 441, the drain electrode of the first transistor T1 is electrically connected to the first end of the speaker 20, and the gate electrode of the first transistor T1 is electrically connected to the control circuit 30.

[0098] Exemplarily, when the second transistor T2 is an N-type field-effect transistor, the source electrode of the second transistor T2 is electrically connected to the second input terminal of the operational amplifier circuit 441, the drain electrode of the second transistor T2 is electrically connected to the second end of the speaker 20, and the gate electrode of the second transistor T2 is electrically connected to the control circuit 30.

[0099] In one embodiment, the second signal processing sub-circuit 42 is electrically connected to the second end of the control circuit 30 through an integrated circuit built-in audio (I2S) bus, and the third signal processing sub-circuit 44 is electrically connected to the third end of the control circuit 30 through a pulse density modulation (PDM) bus.

[0100] In this embodiment, since the integrated circuit built-in audio bus can independently transmit clock signals and data signals, avoiding distortion induced by time difference, the audio recording effect is improved. Since the data transmission speed of the pulse density modulation bus is fast, the third signal processing sub-circuit can quickly transmit the processed audio signal to the control circuit, thereby improving the audio recording efficiency.

[0101] Exemplarily, the third end of the control circuit 30 can be a digital microphone interface (Digital Microphone Interface, DMIC).

[0102] In one embodiment, the microphone includes a capacitive microphone, and the speaker includes a dynamic coil speaker.

[0103] In this embodiment, since the sensitivity of the capacitive microphone is relatively high, it can collect audio signals with small amplitudes. When the amplitude of the audio signal is large, the capacitive microphone will produce distortion, resulting in the inability of the capacitive microphone to collect audio signals. Since the moving coil speaker has a large vibration area, it can collect audio signals with large amplitudes. By using the capacitive microphone to collect audio signals with small amplitudes and the moving coil microphone to collect audio signals with large amplitudes, the dynamic range of the collected audio signals is increased, thereby improving the audio recording effect.

[0104] In one embodiment, the number of microphones 10 and speakers 20 is multiple. The multiple microphones 10 are respectively arranged on two opposite sides of the electronic device. The multiple speakers 20 are respectively arranged on two opposite sides of the electronic device. Some of the microphones 10 and speakers 20 are located on one side of the electronic device.

[0105] In this embodiment, when collecting audio signals, the multiple microphones and the multiple speakers can collect sound signals from different directions to eliminate background noise, and the synthesized audio signal has a surround sound effect, thereby improving the audio recording effect.

[0106] Exemplarily, by simultaneously collecting audio signals through the multiple microphones 10 and the multiple speakers 20, functions such as directional audio recording, such as 3D surround recording and noise reduction functions, can be achieved.

[0107] One exemplary embodiment of the present disclosure also provides an audio circuit, as Figure 10As shown, the audio circuit includes a first capacitive microphone 11, a second capacitive microphone 12, a first dynamic loudspeaker 21, a second dynamic loudspeaker 22, a control circuit 30, a codec CO, a first transistor T1, a second transistor T2, a third transistor T3, a fourth transistor T4, a first smart power amplifier SPA1, and a second smart power amplifier SPA2. A first end of the codec CO is electrically connected to the first capacitive microphone 11, a second end of the codec CO is electrically connected to the second capacitive microphone 12, a third end of the codec CO is electrically connected to a first end of the control circuit 30, a fourth end of the codec CO is electrically connected to the source of the first transistor T1, a fifth end of the codec CO is electrically connected to the source of the second transistor T2, a sixth end of the codec CO is electrically connected to the source of the third transistor T3, and a seventh end of the codec CO is electrically connected to the source of the fourth transistor T4. A first end of the first dynamic loudspeaker 21 is electrically connected to both the drain of the first transistor T1 and a first end of the first smart power amplifier SPA1, and a second end of the first dynamic loudspeaker 21 is electrically connected to both the drain of the second transistor T2 and a second end of the first smart power amplifier SPA1. A first end of the second dynamic loudspeaker 22 is electrically connected to both the drain of the third transistor T3 and a first end of the second smart power amplifier SPA2, and a second end of the second dynamic loudspeaker 22 is electrically connected to both the drain of the fourth transistor T4 and a second end of the second smart power amplifier SPA2. A third end of the first smart power amplifier SPA1 is electrically connected to a second end of the control circuit 30 through an integrated circuit built-in audio bus, and a third end of the second smart power amplifier SPA2 is electrically connected to a third end of the control circuit 30 through the integrated circuit built-in audio bus.

[0108] An exemplary embodiment of the present disclosure further provides an audio circuit, as Figure 11As shown, the audio circuit includes a first capacitive microphone 11, a second capacitive microphone 12, a first dynamic loudspeaker 21, a second dynamic loudspeaker 22, a control circuit 30, a codec CO, a first transistor T1, a second transistor T2, a third transistor T3, a fourth transistor T4, a first smart power amplifier SPA1, and a second smart power amplifier SPA2. A first terminal of the codec CO is electrically connected to the first capacitive microphone 11, a second terminal of the codec CO is electrically connected to the second capacitive microphone 12, and a third terminal of the codec CO is electrically connected to a first terminal of the control circuit 30. A first terminal of the first dynamic loudspeaker 21 is electrically connected to both a drain of the first transistor T1 and a first terminal of the first smart power amplifier SPA1, and a second terminal of the first dynamic loudspeaker 21 is electrically connected to both a drain of the second transistor T2 and a second terminal of the first smart power amplifier SPA1. A first terminal of the second dynamic loudspeaker 22 is electrically connected to both a drain of the third transistor T3 and a first terminal of the second smart power amplifier SPA2, and a second terminal of the second dynamic loudspeaker 22 is electrically connected to both a drain of the fourth transistor T4 and a second terminal of the second smart power amplifier SPA2. A third terminal of the first smart power amplifier SPA1 is electrically connected to a second terminal of the control circuit 30 through an integrated circuit built-in audio bus, and a third terminal of the second smart power amplifier SPA2 is electrically connected to a third terminal of the control circuit 30 through an integrated circuit built-in audio bus. A first terminal of a monitoring unit 4211 of the first smart power amplifier SPA1 is electrically connected to a source of the first transistor T1, and a second terminal of the monitoring unit 4211 of the first smart power amplifier SPA1 is electrically connected to a source of the second transistor T2. A first terminal of a monitoring unit 4211 of the second smart power amplifier SPA2 is electrically connected to a source of the third transistor T3, and a second terminal of the monitoring unit 4211 of the second smart power amplifier SPA2 is electrically connected to a source of the fourth transistor T4.

[0109] An exemplary embodiment of the present disclosure further provides an audio circuit, as Figure 12As shown, the audio circuit includes a first capacitive microphone 11, a second capacitive microphone 12, a first dynamic loudspeaker 21, a second dynamic loudspeaker 22, a control circuit 30, a codec CO, a first transistor T1, a second transistor T2, a third transistor T3, a fourth transistor T4, a first smart power amplifier SPA1, a second smart power amplifier SPA2, a first operational amplifier AMP1, a second operational amplifier AMP2, a first Σ-Δ analog-to-digital converter ADC1, and a second Σ-Δ analog-to-digital converter ADC2. A first end of the codec CO is electrically connected to the first capacitive microphone 11, a second end of the codec CO is electrically connected to the second capacitive microphone 12, and a third end of the codec CO is electrically connected to a first end of the control circuit 30. A first end of the first dynamic loudspeaker 21 is electrically connected to a drain of the first transistor T1 and a first end of the first smart power amplifier SPA1, and a second end of the first dynamic loudspeaker 21 is electrically connected to a drain of the second transistor T2 and a second end of the first smart power amplifier SPA1. A first end of the second dynamic loudspeaker 22 is electrically connected to a drain of the third transistor T3 and a first end of the second smart power amplifier SPA2, and a second end of the second dynamic loudspeaker 22 is electrically connected to a drain of the fourth transistor T4 and a second end of the second smart power amplifier SPA2. A third end of the first smart power amplifier SPA1 is electrically connected to a second end of the control circuit 30 through an integrated circuit built-in audio bus, and a third end of the second smart power amplifier SPA2 is electrically connected to a third end of the control circuit 30 through an integrated circuit built-in audio bus. A first end of the first operational amplifier AMP1 is electrically connected to a source of the first transistor T1, a second end of the first operational amplifier AMP1 is electrically connected to a source of the second transistor T2, and a third end of the first operational amplifier AMP1 is connected to a first end of the first Σ-Δ analog-to-digital converter ADC1. A second end of the first Σ-Δ analog-to-digital converter ADC1 is electrically connected to a digital microphone interface DMIC of the control circuit 30 through a pulse density modulation bus. A first end of the second operational amplifier AMP2 is electrically connected to a source of the third transistor T3, a second end of the second operational amplifier AMP2 is electrically connected to a source of the fourth transistor T4, and a third end of the second operational amplifier AMP2 is connected to a first end of the second Σ-Δ analog-to-digital converter ADC2. A second end of the second Σ-Δ analog-to-digital converter ADC2 is electrically connected to the digital microphone interface DMIC of the control circuit 30 through a pulse density modulation bus.

[0110] In an exemplary embodiment, an electronic device is provided. The electronic device is, for example, a mobile phone, a laptop computer, a tablet computer, a wearable device, etc. The electronic device includes the audio circuit as described above.

[0111] Reference Figure 13As shown, the electronic device 400 may include one or more of the following components: a processing component 402, a memory 404, a power component 406, a multimedia component 408, an audio component 410, an input / output (I / O) interface 412, a sensor component 414, and a communication component 416.

[0112] The processing component 402 generally controls the overall operation of the electronic device 400, such as operations associated with display, telephone calls, data communications, camera operations, and recording operations. The processing component 402 may include one or more processors 420 to execute instructions to complete all or part of the steps of the above methods. In addition, the processing component 402 may include one or more modules to facilitate the interaction between the processing component 402 and other components. For example, the processing component 402 may include a multimedia module to facilitate the interaction between the multimedia component 408 and the processing component 402.

[0113] The memory 404 is configured to store various types of data to support the operation of the electronic device 400. Examples of such data include instructions for any application or method operating on the electronic device 400, contact data, phone book data, messages, pictures, videos, etc. The memory 404 may be implemented by any type of volatile or non-volatile storage terminal or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic disks, or optical disks.

[0114] The power component 406 provides power to the various components of the electronic device 400. The power component 406 may include a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power for the electronic device 400.

[0115] The multimedia component 408 includes a screen that provides an output interface between the electronic device 400 and the user. In some embodiments, the screen may include a liquid crystal display (LCD) and a touch panel (TP). If the screen includes a touch panel, the screen can be implemented as a touch screen to receive input signals from the user. The touch panel includes one or more touch sensors to sense touches, swipes, and gestures on the touch panel. The touch sensors can sense not only the boundaries of touch or swipe actions but also detect the duration and pressure associated with the touch or swipe operations. In some embodiments, the multimedia component 408 includes a front camera module and / or a rear camera module. When the electronic device 400 is in an operation mode, such as a shooting mode or a video mode, the front camera module and / or the rear camera module can receive external multimedia data. Each of the front camera module and the rear camera module can be a fixed optical lens system or have a focal length and optical zoom capabilities.

[0116] The audio component 410 is configured to output and / or input audio signals. For example, the audio component 410 includes a microphone (MIC) that is configured to receive external audio signals when the electronic device 400 is in an operation mode, such as a call mode, a recording mode, and a voice recognition mode. The received audio signals can be further stored in the memory 404 or transmitted via the communication component 416. In some embodiments, the audio component 410 further includes a speaker for outputting audio signals.

[0117] The I / O interface 412 provides an interface between the processing component 402 and a peripheral interface module, and the peripheral interface module can be a keyboard, a click wheel, buttons, etc. These buttons can include but are not limited to: a home button, a volume button, a power button, and a lock button.

[0118] The sensor component 414 includes one or more sensors for providing status assessments of various aspects of the electronic device 400. For example, the sensor component 414 can detect the on / off state of the electronic device 400, the relative positioning of components, such as the display and the keypad of the electronic device 400. The sensor component 414 can also detect a change in the position of the electronic device 400 or a component of the electronic device 400, the presence or absence of user contact with the electronic device 400, the orientation or acceleration / deceleration of the electronic device 400, and the temperature change of the electronic device 400. The sensor component 414 can include a proximity sensor configured to detect the presence of nearby objects without any physical contact. The sensor component 414 can also include a light sensor, such as a CMOS or a CCD image sensor, for use in imaging applications. In some embodiments, the sensor component 414 can further include an acceleration sensor, a gyro sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.

[0119] The communication component 416 is configured to facilitate communication between the electronic device 400 and other terminals in a wired or wireless manner. The electronic device 400 can access a communication standard-based wireless network, such as WiFi, 2G, 3G, 4G, 5G, or a combination thereof. In an exemplary embodiment, the communication component 416 receives a broadcast signal or broadcast-related information from an external broadcast management system via a broadcast channel. In an exemplary embodiment, the communication component 416 further includes a Near Field Communication (NFC) module to facilitate short-range communication. For example, the NFC module can be implemented based on Radio Frequency Identification (RFID) technology, Infrared Data Association (IrDA) technology, Ultra-Wideband (UWB) technology, Bluetooth (BT) technology, and other technologies.

[0120] In an exemplary embodiment, the electronic device 400 can be implemented by one or more Application Specific Integrated Circuits (ASICs), Digital Signal Processors (DSPs), Digital Signal Processing Terminals (DSPDs), Programmable Logic Devices (PLDs), Field Programmable Gate Arrays (FPGAs), controllers, microcontrollers, microprocessors, or other electronic components.

[0121] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0122] Furthermore, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" can explicitly or implicitly include at least one of the features. In the description of the present disclosure, "a plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0123] Those skilled in the art will readily conceive of other embodiments of the present disclosure after considering the specification and practicing the utility model disclosed herein. The present disclosure is intended to cover any variations, uses, or adaptations of the present disclosure that follow the general principles of the present disclosure and include known common general knowledge or conventional technical means in the technical field not disclosed by the present disclosure. The specification and examples are only to be considered as exemplary, and the true scope and spirit of the present disclosure are pointed out by the following claims.

[0124] It should be understood that the present disclosure is not limited to the exact structures described above and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of the present disclosure is only limited by the appended claims.

Claims

1. An audio circuit, characterized in that: The audio circuit comprises: A microphone, wherein the microphone is used to collect a first audio signal; A speaker, the speaker is used to collect the second audio signal and play the third audio signal; Control circuit; A signal processing circuit, wherein the signal processing circuit is electrically connected to the microphone, the speaker and the control circuit, and the signal processing circuit is used to process the first audio signal and the second audio signal and transmit them to the control circuit, and to process the audio signal output by the control circuit into the third audio signal and transmit it to the speaker.

2. The audio circuit according to claim 1, characterized in that: The signal processing circuit comprises: a first signal processing subcircuit, wherein a first end of the first signal processing subcircuit is electrically connected to the microphone, a second end of the first signal processing subcircuit is electrically connected to a first end of the control circuit, and the first signal processing subcircuit is used to process the first audio signal; a second signal processing subcircuit, wherein a first end of the second signal processing subcircuit is electrically connected to the speaker, a second end of the second signal processing subcircuit is electrically connected to a second end of the control circuit, and the second signal processing subcircuit is used to process the audio signal output by the control circuit into the third audio signal; A switch circuit is electrically connected between the speaker and the control circuit, and is used to enable or stop the second audio signal from being transmitted to the control circuit.

3. The audio circuit according to claim 2, characterized in that: The switch circuit comprises: a first transistor electrically connected between a first terminal of the speaker and the control circuit; A second transistor is electrically connected between the second end of the speaker and the control circuit.

4. The audio circuit according to claim 2, characterized in that: The first signal processing sub-circuit comprises: a codec circuit, wherein a first end of the codec circuit is electrically connected to the microphone, a second end of the codec circuit is electrically connected to a first end of the control circuit, and a third end of the codec circuit is electrically connected to a first end of the switch circuit; Wherein, the second end of the switch circuit is electrically connected to the speaker.

5. The audio circuit according to claim 4, characterized in that: The third terminal of the codec circuit includes a first sub-terminal and a second sub-terminal; the switch circuit includes: a first transistor, the first transistor being electrically connected between a first terminal of the speaker and a first sub-terminal of the codec circuit; A second transistor is electrically connected between the second terminal of the speaker and the second sub-terminal of the codec circuit.

6. The audio circuit according to claim 2, characterized in that: The second signal processing sub-circuit comprises: a power amplifier circuit, wherein a first end of the power amplifier circuit is electrically connected to the speaker, a second end of the power amplifier circuit is electrically connected to a second end of the control circuit, and a third end of the power amplifier circuit is electrically connected to a first end of the switch circuit; Wherein, the second end of the switch circuit is electrically connected to the speaker.

7. The audio circuit according to claim 6, characterized in that: The power amplifier circuit includes a monitoring unit; the switch circuit includes: a first transistor, the first transistor being electrically connected between a first terminal of the speaker and a first terminal of the monitoring unit; A second transistor is electrically connected between a second terminal of the speaker and a second terminal of the monitoring unit.

8. The audio circuit according to claim 2, characterized in that: The signal processing circuit further includes: a third signal processing subcircuit, the third signal processing subcircuit being electrically connected between the control circuit and the switch circuit; a first end of the third signal processing subcircuit being electrically connected to a first end of the switch circuit, a second end of the third signal processing subcircuit being electrically connected to a third end of the control circuit, and the third signal processing subcircuit being used to process the second audio signal; Wherein, the second end of the switch circuit is electrically connected to the speaker.

9. The audio circuit according to claim 8, characterized in that: The third signal processing sub-circuit comprises: an operational amplifier circuit, the operational amplifier circuit being electrically connected between the switch circuit and the control circuit; a first end of the operational amplifier circuit being electrically connected to a first end of the switch circuit; An analog-to-digital conversion circuit, wherein the analog-to-digital conversion circuit is electrically connected between the operational amplifier circuit and the control circuit; a first end of the analog-to-digital conversion circuit is electrically connected to a second end of the operational amplifier circuit, and a second end of the analog-to-digital conversion circuit is electrically connected to a third end of the control circuit.

10. The audio circuit according to claim 9, characterized in that: The switch circuit comprises: a first transistor, the first transistor being electrically connected between a first terminal of the speaker and a first input terminal of the operational amplifier circuit; A second transistor is electrically connected between a second terminal of the speaker and a second input terminal of the operational amplifier circuit.

11. The audio circuit according to claim 8, characterized in that: The second signal processing subcircuit is electrically connected to the second end of the control circuit via an integrated circuit built-in audio bus, and the third signal processing subcircuit is electrically connected to the third end of the control circuit via a pulse density modulation bus.

12. The audio circuit according to any one of claims 1 to 11, characterized in that: The microphone comprises a condenser microphone, and the speaker comprises a dynamic speaker.

13. The audio circuit according to any one of claims 1 to 11, characterized in that: There are multiple microphones and multiple speakers; the multiple microphones are respectively arranged on two opposite sides of the electronic device; the multiple speakers are respectively arranged on two opposite sides of the electronic device; some of the microphones and the speakers are located on one side of the electronic device.

14. An electronic device, characterized in that: The electronic device comprises the audio circuit according to any one of claims 1 to 13.

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