CN111556409A - Microphone control circuit and electronic equipment - Google Patents
Microphone control circuit and electronic equipment Download PDFInfo
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- CN111556409A CN111556409A CN202010441404.XA CN202010441404A CN111556409A CN 111556409 A CN111556409 A CN 111556409A CN 202010441404 A CN202010441404 A CN 202010441404A CN 111556409 A CN111556409 A CN 111556409A
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
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Abstract
Embodiments of the present invention provide a microphone control circuit and an electronic device, so as to prevent a microphone from being turned on when a user does not allow the microphone to be turned on. The microphone control circuit comprises a trigger unit, a control unit and a microphone circuit. The triggering unit is connected with the triggering end of the control unit and used for outputting a triggering signal to the triggering end of the control unit according to the operation of a user. Furthermore, the first end of the control unit is connected with the input end of the microphone circuit, and the control unit is used for transmitting a first control signal to the microphone circuit according to the trigger signal, wherein the first control signal is used for controlling the microphone circuit to be powered on or powered off. The embodiment of the invention realizes that the terminal is prevented from being intercepted from hardware through the microphone control circuit, thereby effectively protecting the privacy security of users.
Description
Technical Field
The present invention relates to the field of electronic technologies, and in particular, to a microphone control circuit and an electronic device.
Background
Along with the development of science and technology, the application of intelligent sound boxes is more and more extensive, and the intelligent sound boxes used in families and work are more and more diversified, but the microphone circuit in the existing intelligent sound box is generally directly controlled by software, so that the risk of remote hijacking by a hacker exists, when the microphone circuit is hijacked, the sound of a user can be acquired by the hacker unknowingly, and the privacy leakage risk exists.
Therefore, there is a need for a microphone control circuit that operates only when allowed by a user, and that avoids the privacy of the user from being compromised.
Disclosure of Invention
The embodiment of the invention provides a microphone control circuit and electronic equipment, which are used for reducing the risk of privacy disclosure of a user.
In a first aspect, an embodiment of the present invention provides a microphone control circuit, which includes a trigger unit, a control unit, and a microphone circuit. The triggering unit is connected with the triggering end of the control unit and used for outputting a triggering signal to the triggering end of the control unit according to the operation of a user. Furthermore, the first end of the control unit is connected with the input end of the microphone circuit, the control unit is used for transmitting a first control signal to the microphone circuit according to the trigger signal, and the first control signal is used for controlling the microphone circuit to be powered on or powered off.
Illustratively, a user can instruct the trigger switch to generate a trigger signal through a physical switch of the smart speaker, so as to control the power-on state of the microphone circuit, ensure that the smart speaker can be awakened only when the user knows the condition, and ensure the privacy security of the user.
In a possible implementation, the microphone control circuit further includes an indicator light circuit, which may include a first MOS transistor, a second MOS transistor, an indicator light device, and an indicator light power supply. The first trigger end of the first MOS tube and the second trigger end of the second MOS tube are connected with the second end of the control unit and used for receiving a second control signal of the control unit. Furthermore, the first end of the first MOS tube is grounded, and the second end of the first MOS tube is connected with the first end of the second MOS tube. The second end of the second MOS tube is connected with the first end of the indicator light device, and the second end of the indicator light device is connected with the indicator light power supply.
For example, a user can determine the power-on state of a microphone circuit therein through an indicator lamp of the smart sound box, help the user to control the working state of the microphone, and thus help protect the privacy of the user.
In a possible embodiment, the indicator lamp circuit at least comprises a first MOS tube, a second MOS tube, an indicator lamp device, a first indicator lamp power supply and a second indicator lamp power supply. The first trigger end of the first MOS tube is connected with the second end of the control unit and used for receiving a second control signal. The first end of the first MOS tube is connected with the power supply of the first indicator lamp. The second end ground connection of first MOS pipe, second control signal be used for controlling first end of first MOS pipe with switching on or breaking off of second end, the second trigger end of second MOS pipe with the first end of first MOS pipe is connected, and the first end of second MOS pipe is connected with the first end of pilot lamp device, and the second end ground connection of second MOS pipe, the second end and the second pilot lamp power connection of pilot lamp ware.
Exemplarily, the indication lamp device can be controlled by controlling the first MOS tube and the second MOS tube of the indication lamp circuit, so that the working state of the microphone circuit can be displayed for a user, and the effect of better protecting the privacy of the user is achieved.
In one possible embodiment, the triggering unit comprises a triggering switch. The first end of the trigger switch is grounded, the second end of the trigger switch is connected with the trigger power supply, and the trigger switch is used for being switched on or switched off according to the operation of a user so as to output a trigger signal.
Illustratively, the operation of the user is used to instruct a trigger switch in the trigger unit to generate a corresponding trigger signal, so as to help the user to control the power-on state of the microphone circuit and to help protect the privacy of the user.
In a possible embodiment, the microphone control circuit further comprises a load switch, wherein the first end of the control unit is connected to the microphone circuit via the load switch. And the load switch is used for providing working voltage for the microphone circuit according to the trigger signal.
Illustratively, the load switch is used for providing the microphone circuit with the working voltage according to the trigger signal, so as to help control the working condition of the microphone circuit.
In a possible implementation manner, a third terminal of the control unit is connected to the signal circuit, and the control unit is configured to send a third control signal to the signal circuit according to the trigger signal; the third control signal is used to indicate the operating state of the microphone circuit.
Illustratively, the working state of the microphone circuit, such as the power-on state, is sent to the terminal through the signal circuit, so that the terminal knows whether the microphone can work, and the user experience is improved.
In one possible embodiment, the control unit may be a trigger power source.
In one possible embodiment, the microphone control circuit may further include a switching circuit. The trigger end of the switch circuit is connected with the fourth end of the control unit and is used for receiving a fourth control signal of the control unit. Further, a first end of a switch circuit is connected with an output end of the microphone circuit; the second terminal of the switch circuit is connected with the codec. And the switch circuit is used for controlling the connection state of the microphone circuit and the coder-decoder according to the fourth control signal.
Illustratively, the microphone circuit and the codec are connected through the switch circuit, and the microphone circuit and the codec are communicated according to a fourth control signal of the control unit, so that the collected user information of the microphone circuit is transmitted to the codec. Optionally, the codec is connected to a control system of the terminal, and transmits the compiled or decoded information to the control system of the terminal, so that the terminal receives user voice information collected by the microphone circuit in a power-on state.
In a second aspect, an embodiment of the present invention provides an electronic device, which includes the microphone control circuit as provided in the first aspect of the embodiment of the present invention.
Compared with the prior art, the invention has the beneficial effects that:
according to the microphone control circuit provided by the embodiment of the invention, the trigger unit is used for receiving the operation of the user and sending the trigger signal to the control circuit, so that the control circuit can generate each control signal, the states of the microphone circuit, the signal circuit and the like are further controlled, and the power-on or power-off under the operation of the user is realized. Furthermore, the indication lamp circuit is arranged, so that the microphone is on when in a power-on state and is not on when in a power-off state, a user is helped to acquire information of the power-on state of the microphone, and user experience is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments of the present invention will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a microphone control circuit according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a microphone control circuit according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a microphone control circuit according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a microphone control circuit according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a microphone control circuit according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a microphone control circuit according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of a microphone control circuit according to an embodiment of the present invention;
fig. 8 is a schematic structural diagram of a microphone control circuit according to an embodiment of the present invention;
fig. 9 is a schematic structural diagram of a microphone control circuit according to an embodiment of the present invention;
fig. 10 is a schematic structural diagram of a microphone control circuit according to an embodiment of the present invention;
fig. 11 is a schematic structural diagram of a microphone control circuit according to an embodiment of the present invention;
fig. 12 is a schematic structural diagram of a switch circuit according to an embodiment of the present invention;
fig. 13 is a schematic structural diagram of a microphone control circuit according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention.
It is to be understood that the terms "first," "second," and the like in the description and in the claims, and in the drawings, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in other sequences than those illustrated or otherwise described herein. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.
In view of the fact that the microphone circuit is wakened up by software in the prior art, when a terminal corresponding to the microphone circuit is attacked by a hacker, the hacker can waken up the microphone circuit silently through background software so as to acquire privacy information of the user, and the privacy of the user can be stolen unconsciously by the user.
The following describes the microphone control circuit according to the present invention in detail with reference to the accompanying drawings and embodiments.
An embodiment of the present invention provides a microphone control circuit, as shown in fig. 1, the microphone control circuit includes: trigger unit 10, control unit 20, microphone circuit 30.
The trigger unit 10 is connected to a trigger terminal of the control unit 20, and is configured to output a trigger signal to the trigger terminal of the control unit 20 according to a user operation. Further, a first terminal of the control unit 20 is connected to an input terminal of the microphone circuit 30, and the control unit 20 is configured to transmit a first control signal to the microphone circuit 30 according to the trigger signal, where the first control signal is used to control the microphone circuit 30 to be powered on or powered off.
In the implementation of the present invention, after receiving the operation of the user, the triggering unit 10 generates a corresponding triggering signal and sends the corresponding triggering signal to the control unit 20, and further, the control unit 20 generates a corresponding first control signal according to the triggering signal and sends the corresponding first control signal to the microphone circuit 30 through the first end. Illustratively, when the operation of the user is a first operation, the triggering unit 10 generates a corresponding triggering signal, and the control unit 20 may generate a corresponding first control signal to the microphone circuit 30 according to the triggering signal, may supply power to the microphone circuit 30, and the microphone circuit 30 enters a power-on state. Illustratively, when the user's operation is the second operation, the triggering unit 10 generates a corresponding triggering signal, and then the control unit 20 does not supply power to the microphone circuit 30 according to the triggering signal, and the microphone circuit 30 is in a power-off state at this time. The trigger unit 10 and the control circuit realize that the user controls the power-on state of the microphone circuit 30, so that the microphone circuit 30 is ensured to work only under the permission of the user, and the privacy safety of the user is protected.
Based on the above description, the embodiment of the present invention provides a microphone control circuit, as shown in fig. 2, wherein the second terminal of the control unit 20 is connected to the input terminal of the indicator light circuit 40. Wherein the control unit 20 is configured to send a second control signal to the indicator light circuit 40 according to the trigger signal. Further, the second control signal is used to control the indicator light circuit 40 to power up or power down.
In the implementation of the present invention, after the trigger unit 10 receives the user operation, the corresponding trigger signal is sent to the control unit 20 according to the user operation, and the control unit 20 generates a second control signal according to the trigger signal and sends the second control signal to the indicator circuit 40 through the second end. Further, the indicator light circuit 40 controls the indicator light to be on or off according to the second control signal. The user can intuitively know the current power-on state of the microphone circuit 30 through the bright and dark states of the indicator lamps, and the privacy and safety of the user can be better protected.
Based on the above description, the indicator light circuit 40 may include, but is not limited to, the following two:
the first method comprises the following steps: as shown in fig. 3, the indicator lamp circuit 40 includes at least a first MOS transistor 401, a second MOS transistor 402, an indicator lamp device 403, and an indicator lamp power supply 404. The first trigger end of the first MOS transistor 401 and the second trigger end of the second MOS transistor 402 are connected to the second end of the control unit 20, and are configured to receive a second control signal of the control unit 20. Further, a first end of the first MOS transistor 401 is grounded, a second end of the first MOS transistor 401 is connected to a first end of the second MOS transistor 402, and a second end of the second MOS transistor 402 is connected to a first end of the indicator light device 403. Still further, a second terminal of the indicator light device 403 is connected to an indicator light power supply 404.
In this embodiment of the present invention, the control unit 20 generates a corresponding second control signal according to the trigger signal, and sends the second control signal to the trigger terminal of the first MOS transistor 401 in the indicator light circuit 40 through the second terminal.
For example, when the user operation is the first operation, the second control signal generated by the control unit 20 may be a low level signal, the first MOS transistor 401 and the second MOS transistor 402 do not conduct the respective first end and second end after receiving the low level signal, the indicator lamp device 403 is not conducted with the indicator lamp power supply 404, and the indicator lamp device 403 is not turned on. In the embodiment of the present invention, the user may power on the microphone circuit 30 through the first operation, and may turn off the indicator light device 403.
Accordingly, the microphone circuit 30 is de-energized, at which time the indicator light device 403 is illuminated. Then, the user can obtain the power-on state of the microphone circuit 30 only according to the bright and dark state of the indicator light device 403, so as to help the user to control the microphone circuit 30, thereby improving the user experience.
For example, when the user operation is the second operation, the second control signal correspondingly generated by the control unit 20 may be a high level signal, and the first MOS transistor 401 turns on the first end and the second end according to the low level signal. Further, the trigger terminal of the second MOS transistor 402 receives the second control signal and turns on the first terminal and the second terminal of the second MOS transistor 402, and then the indicator lamp device 403 is grounded through the second MOS transistor 402, the indicator lamp device 403 is turned on with the indicator lamp power supply 404, and the indicator lamp device 403 is turned on.
And the second method comprises the following steps: as shown in fig. 4, the indicator lamp circuit 40 includes at least a first MOS transistor 401, a second MOS transistor 402, an indicator lamp device 403, a first indicator lamp power supply 405, and a second indicator lamp power supply 406. The first trigger terminal of the first MOS transistor 401 is connected to the second terminal of the control unit 20, and is configured to receive a second control signal. Further, a first end of the first MOS transistor 401 is connected to the first indicator lamp power supply 405, and a second end of the first MOS transistor 401 is grounded. The second control signal is used for controlling the on/off of the first end and the second end of the first MOS transistor 401. The second trigger terminal of the second MOS transistor 402 is connected to the first terminal of the first MOS transistor 401, the first terminal of the second MOS transistor 402 is connected to the first terminal of the indicator light device 403, and the second terminal of the second MOS transistor 402 is grounded. The second end of the indicator light is connected to a second indicator light power supply 406.
In the embodiment of the present invention, the indicator lamp device 403 is turned on or off according to the second control signal of the control unit 20 by using the first MOS transistor 401, the second MOS transistor 402, the first indicator lamp power supply 405, and the second indicator lamp power supply 406.
For example, when the user operation is the first operation, the control unit 20 generates the corresponding second control signal may be a high level signal. Further, the first MOS transistor 401 conducts the first terminal and the second terminal according to the high level, and the first indicator lamp power supply 405 is grounded according to the conducted first MOS transistor 401. At this time, the second MOS transistor 402 is not turned on, the indicator lamp device 403 is not turned on with the second indicator lamp power supply 406, and the indicator lamp device 403 is not turned on.
Illustratively, when the user's operation is a second operation, the control unit 20 generates a corresponding second control signal, which is a low level signal, and the first MOS transistor 401 does not conduct its first and second terminals according to the low level signal. Furthermore, the trigger terminal of the second MOS transistor 402 conducts the first terminal and the second terminal of the second MOS transistor according to the power supply of the first indicator lamp power supply 405, the indicator lamp device 403 is grounded through the conducted second MOS transistor 402, and at this time, the indicator lamp device 403 is conducted with the second indicator lamp power supply 406, and the indicator lamp device 403 is turned on.
In the embodiment of the present invention, the triggering unit 10 sends out a corresponding triggering signal according to an operation of a user, and the control unit 20 may control the microphone circuit to be powered on according to a corresponding control signal generated by the corresponding triggering signal, where the indicator light device 403 is not turned on; or to control the microphone circuit 30 to be powered off, at which time the indicator light device 403 is illuminated. The microphone circuit 30 is controlled to be powered on or powered off according to the user operation, and the user can obtain the current power-on state of the microphone circuit 30 through the brightness state of the corresponding indicator lamp device 403, so that the user can be helped to better control the microphone, and the privacy of the user can be helped to be protected.
In one possible embodiment, as shown in fig. 5, the triggering unit 10 comprises a triggering switch 101. Further, a first terminal of the trigger switch 101 is grounded, and a second terminal of the trigger switch 101 is connected to the trigger power source 102. The trigger switch 101 is turned on or off according to a user operation, and outputs a corresponding trigger signal.
In the embodiment of the present invention, a user operates the trigger switch 101 to turn it on or off, thereby sending out a trigger signal. Illustratively, when the trigger switch 101 is closed, the trigger switch 101 is grounded and outputs a low-level signal; when the trigger switch 101 is turned on, the trigger switch 101 sends a high level signal according to the trigger power supply 102, so that a corresponding trigger signal is generated according to user operation, and the user is helped to control the microphone control circuit.
In one possible embodiment, as shown in fig. 6, the microphone control circuit further comprises a load switch 50. A first terminal of the control unit 20 is connected to the microphone circuit 30 via a load switch 50. Further, the load switch 50 is used for providing an operating voltage to the microphone circuit 30 according to the trigger signal.
In the embodiment of the present invention, the load switch 50 is configured to be turned on or off according to a first control signal of the control unit 20. Illustratively, when the user's operation is a first operation, the load switch 50 is turned on according to the first control signal, and the microphone circuit 30 enters a power-on state according to the turned-on load switch 50. In the embodiment of the invention, the power-on state of the microphone circuit 30 is controlled according to the operation of the user, and the privacy of the user is protected.
In a possible embodiment, as shown in fig. 7, the third terminal of the control unit 20 is connected to the signal circuit 60, and the control unit 20 is configured to send a third control signal to the signal circuit 60 according to the trigger signal; the third control signal is used to indicate the operational state of the microphone circuit 30.
In this embodiment of the present invention, the microphone control circuit may further include a signal circuit 60, where the signal circuit 60 is configured to send a corresponding indication signal to a terminal, for example, a main control chip of the terminal according to the third control signal of the control unit 20, so as to help the terminal to operate the microphone circuit 30, so that when the microphone circuit 30 is in a power-on state, the terminal allows a user to wake up the microphone, and improve user experience.
In one possible embodiment, as shown in FIG. 8, the control unit 20 is a trigger power supply 102.
In the embodiment of the present invention, the control unit 20 of the microphone control circuit may be the trigger power supply 102, and further, the trigger switch 101 in the trigger unit 10 generates a corresponding control signal. Illustratively, when the trigger switch 101 is closed, the trigger power supply 102 is grounded through the trigger switch 101, and outputs a low-level control signal; correspondingly, when the trigger switch 101 is turned on, the trigger power supply 102 outputs a high-level control signal. In the embodiment of the invention, the corresponding control signal is output according to the user operation, and the power is supplied to the microphone circuit 30 by turning on the load switch 50, so that the user is helped to control the microphone circuit 30, and the privacy and safety of the user are helped to be protected.
Further, in one possible embodiment, as shown in fig. 9, the microphone control circuit further includes a switch circuit 70. Wherein the trigger terminal of the switching circuit 70 is connected to the fourth terminal of the control unit 20, i.e. the trigger power source 102, for receiving a fourth control signal of the control unit 20. A first terminal of the switch circuit 70 is connected to an output terminal of the microphone circuit 30. A second terminal of the switching circuit 70 is connected to the codec 80. Further, the switch circuit 70 is used for controlling the connection state of the microphone circuit 30 and the codec 80 according to the fourth control signal.
In the embodiment of the present invention, the information collected by the microphone circuit 30 is transmitted to the codec 80 connected to the switch circuit 70 through the switch circuit 70. Illustratively, when a user initiates a first operation, the control unit 20 generates a fourth control signal, which may be a high level signal, according to a corresponding trigger signal, and sends the fourth control signal to the switch circuit 70 through the fourth terminal, the switch circuit 70 turns on the first terminal and the second terminal according to the high level signal, and the user information collected by the microphone circuit 30 is transmitted to the codec 80 through the first terminal and the second terminal of the switch circuit 70. Further, the user information obtained by the codec 80 is encoded or decoded, optionally, the codec 80 is connected to a main control chip of the terminal, and sends the processed user information to the main control chip, so that the main control chip of the terminal collects and processes the user information.
In a possible embodiment, a schematic diagram of a microphone control circuit shown in fig. 10 includes: and the trigger unit 10 is connected with a trigger end of the control unit 20 and is used for outputting a corresponding trigger signal to the control unit 20 according to the operation of a user.
Further, a first terminal of the control unit 20 is connected to the microphone circuit 30 through the load switch 50, for powering the microphone circuit 30 to enter a power-on state if the load switch 50 is closed.
A second terminal of the control unit 20 is connected to the trigger terminal of the indicator light circuit 40. The control unit 20 is connected to the first trigger end of the first MOS transistor 401 and the second trigger end of the second MOS transistor 402, and configured to output a corresponding second control signal to the trigger ends. Further, a first end of the first MOS transistor 401 is grounded, a second end of the first MOS transistor is connected to a first end of the second MOS transistor 402, a second end of the second MOS transistor 402 is connected to a first end of the indicator light device 403, and a second end of the indicator light device 403 is connected to the indicator light power supply 404.
The third terminal of the control circuit is connected to the signal circuit 60, and the signal circuit 60 may send a corresponding signal to the main control chip of the terminal according to the received fourth control signal, and the terminal may obtain the power-on state of the microphone circuit 30 through the signal.
Illustratively, the user can input an operation to the trigger switch 101 in the switch unit, and illustratively, the trigger switch 101 may be a physical switch disposed on the terminal, and the physical switch may be an external key, a dial, or the like. For example, the trigger switch 101 is pressed once by the user to be in one state, and released to be in another state. The control unit 20 is configured to output various control signals, and further, the control unit 20 controls the power supply of the microphone circuit 30 and the light-dark state of the indicator light by controlling the load switch 50, and may also notify the terminal of the power-on state of the microphone circuit 30 through the signal circuit 60, so that the terminal wakes up the powered-on microphone circuit 30 through software, thereby helping the user to better control the microphone circuit 30 and protecting the privacy of the user.
In a possible embodiment, a schematic diagram of a microphone control circuit shown in fig. 11 includes:
the trigger switch 101 in the trigger unit 10 has one end connected to the trigger power supply 102 and the other end grounded. A first terminal of the trigger power supply 102 is connected to the microphone circuit 30 through the load switch 50; the second end of the trigger power supply 102 is connected to the trigger end of the first MOS transistor 401 of the indicator lamp circuit 40, the first end of the first MOS transistor 401 is grounded, the second end is connected to the trigger end of the second MOS transistor 402, the trigger end of the second MOS transistor 402 is further connected to the first indicator lamp power supply 405, the first end of the second MOS transistor 402 is grounded, the second end is connected to the first end of the indicator lamp device 403, and the second end of the indicator lamp device 403 is connected to the second indicator lamp power supply 406.
The trigger power supply 102 is also connected to the trigger terminal of the switching circuit 70, the input terminal of the switching circuit 70 being connected to the output terminal of the microphone circuit 30, and the output terminal of the switching circuit 70 being connected to the codec 80.
The structure of the switching circuit 70 is shown in fig. 12, and includes: a trigger terminal for connecting with the trigger power supply 102; an input for connection with a microphone circuit 30; an output terminal for connection with codec 80; the system also comprises a power supply end which is used for being connected with a system power supply of the terminal; and the grounding end is used for grounding.
As shown in the following table, when the power source end is connected to the system power source, if the trigger end receives a high level signal, the input end is conducted with the output end; if the trigger end receives the low level signal, the input end and the output end are not conducted.
| Power supply terminal | Trigger terminal | Input terminal and output terminal |
| High level | High level | Conduction of |
| High level | Low level of electricity | Disconnect |
Illustratively, when the trigger switch 101 of the trigger unit 10 receives a first operation of the user, the trigger switch 101 is turned off, the trigger power source 102 outputs a first control signal to the load switch 50 and instructs the load switch 50 to be closed, the load switch 50 is turned on, and thus the microphone circuit 30 receives power supply from the trigger power source 102, and the microphone circuit 30 is powered on at this time.
Further, the trigger power supply 102 outputs a high level to the trigger terminal of the first MOS tube 401 in the indicator light circuit 40, the first and second terminals of the first MOS tube 401 are conducted, the first indicator light power supply 405 is grounded, the second MOS tube 402 is not conducted, the indicator light device 403 is not conducted with the indicator light power supply 404, and at this time, the indicator light device 403 is not lit.
Illustratively, when the trigger switch 101 of the trigger unit 10 receives the second operation of the user, the microphone circuit 30 is powered off and powered off. Further, the trigger power supply 102 outputs a low level to the trigger terminal of the first MOS transistor 401 in the indicator light circuit 40, the first MOS transistor 401 is not turned on, the trigger terminal of the second MOS transistor 402 turns on the first terminal and the second terminal according to the first indicator light power supply 405, the indicator light device 403 is grounded, the indicator light device 403 is turned on with the indicator light power supply 404, and the indicator light device 403 is turned on.
In a possible embodiment, when a user inputs a first operation, the trigger switch 101 is turned off, the trigger power supply 102 outputs a high-level control signal to the switch circuit 70, the first terminal and the second terminal of the switch circuit 70 are turned on, the microphone circuit 30 is connected to the codec 80, the microphone circuit 30 transmits information collected by itself to the codec 80, and the information processed by the codec 80 can be sent to a main control chip of a terminal for further processing, so that the terminal can obtain the information collected by the microphone circuit 30.
Based on the above description, the embodiment of the present invention further includes a schematic structural diagram of a microphone control circuit shown in fig. 13, which includes the triggering unit 10, the triggering power source 102, the load switch 50, and the indicator light circuit 40 shown in fig. 11;
the microphone control circuit further includes a microphone circuit 30, which specifically includes a first microphone circuit and a second microphone circuit 302. Further, the microphone control circuit further includes a switch circuit 70, which specifically includes a first switch circuit and a second switch circuit.
In one possible embodiment, the trigger power supply 102 is connected to the trigger terminal of the first switch circuit 701 of the switch circuit 70 and also to the trigger terminal of the second switch circuit 702.
In one possible embodiment, the output of the first microphone circuit 301 is connected to the input of the first switch circuit 701, and the output of the first switch circuit 701 is connected to the codec 80; the output terminal of the second microphone circuit 302 is connected to the input terminal of the second switch circuit 702; the output terminal of the second switch circuit 702 is connected to the codec 80;
illustratively, the trigger switch 101 may be a push-button switch, optionally, the initial state of the push-button switch is closed, and when the push-button switch is released after the first pressing by the user, the push-button switch is opened and maintains the opened state; further, when released after the user presses it a second time, the push button switch remains closed.
Illustratively, when the user inputs a first operation, such as releasing the first time the push button switch is pressed, and accordingly the push button switch, i.e. the trigger switch 101, is turned off, and the trigger power source 102 outputs a high-level control signal to the load switch 50 and turns on, the first microphone circuit 301 and the second microphone circuit 302 in the microphone circuit 30 are in a power-on state; further, the trigger power supply 102 outputs a high-level control signal to the first switch circuit 701 and the second switch circuit 702 of the switch circuit 70; at this time, the input end and the output end of the first switch circuit 701 are turned on, and the first microphone circuit 301 is connected to the codec 80; similarly, the second microphone circuit 302 is connected to the codec 80. Further, the first microphone circuit 301 and the second microphone circuit 302 transmit the information collected by themselves to the codec 80, and the information can be sent to the main control chip of the terminal for further processing after being processed by the codec 80, so that the terminal can acquire the information collected by the first microphone circuit 301 and the second microphone circuit 302. Still further, the trigger power source 102 outputs a high-level control signal to the indicator light circuit 40, wherein the first end and the second end of the first MOS tube 401 are connected, the first indicator light power source 405 is grounded, the second MOS tube 402 is disconnected, and the indicator light device 403 is not connected and is not lit.
Illustratively, when the user inputs a second operation, such as pressing the button switch for a second time, and then releases the button switch, that is, the trigger switch 101, accordingly, is closed; the trigger power source 102 outputs a low-level control signal to the load switch 50, the load switch 50 is not turned on, and the microphone circuit 30 is in a non-power-on state. Further, the trigger power supply 102 outputs a low-level control signal to the trigger end of the first switch circuit 701 and the trigger end of the second switch circuit 702 of the switch circuit 70, and at this time, the first switch circuit 701 and the second switch circuit 702 do not turn on their own input end and output end; still further, the trigger power source 102 outputs a low-level control signal to the indicator lamp circuit 40, at this time, the first MOS tube 401 is not conducted, the second MOS tube 402 receives a high-level signal of the first indicator lamp power source 405 and conducts the first end and the second end of the second MOS tube, the indicator lamp device 403 is grounded, the second MOS tube is conducted with the second indicator lamp power source 406, and the indicator lamp device 403 receives the power supply of the power source and turns on. The embodiment of the invention realizes that the terminal is prevented from being intercepted from hardware through the microphone control circuit, thereby effectively protecting the privacy security of users.
Through the double-microphone circuit 30, the acquired information is more accurate, for example, the terminal can more accurately collect the voice information of the user through the double-microphone circuit 30, the quality of conversation and conversation is better, and the user experience is improved.
In one possible embodiment, the microphone circuit 30 in the above-described microphone control circuit may use an electret microphone circuit, an AMIC (analog microphone circuit), and a DMIC (digital microphone circuit). Wherein, if use electret microphone circuit, can get rid of load switch 50, electret microphone circuit is direct to be connected with switch circuit 70's input, and switch circuit 70 supplies power for electret microphone circuit through the input, and electret microphone circuit is electrified. When the trigger terminal of the switch circuit 70 receives a high level signal from the trigger power supply 102, the input terminal and the output terminal thereof are turned on, and the information collected by the electret microphone circuit is output to the codec 80 for processing. According to the embodiment of the invention, the recording function of the microphone circuit 30 is turned off according to hardware, the current power-on state of the microphone circuit 30 is indicated by one key for protection and an indicator lamp, and the privacy of a user is protected.
Based on the same conception, the embodiment of the invention also provides electronic equipment, and the electronic equipment comprises the microphone control circuit.
Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.
It will be understood that the present disclosure is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.
Claims (10)
1. A microphone control circuit is characterized by comprising a trigger unit, a control unit and a microphone circuit;
the trigger unit is connected with the trigger end of the control unit and used for outputting a trigger signal to the trigger end of the control unit according to the operation of a user;
the first end of the control unit is connected with the input end of the microphone circuit, and the control unit is used for transmitting a first control signal to the microphone circuit according to the trigger signal; the first control signal is used for controlling the microphone circuit to be powered on or powered off.
2. The circuit of claim 1,
the second end of the control unit is connected with the input end of the indicator light circuit, and the control unit is used for sending a second control signal to the indicator light circuit according to the trigger signal; the second control signal is used for controlling the power-on or power-off of the indicator light circuit.
3. The circuit of claim 2, wherein the indicator lamp circuit comprises at least a first MOS transistor, a second MOS transistor, an indicator lamp device, and an indicator lamp power supply;
the first trigger end of the first MOS tube and the second trigger end of the second MOS tube are connected with the second end of the control unit and used for receiving a second control signal of the control unit;
the first end of the first MOS tube is grounded, and the second end of the first MOS tube is connected with the first end of the second MOS tube; the second end of the second MOS tube is connected with the first end of the indicator light device; and the second end of the indicator light device is connected with the indicator light power supply.
4. The circuit of claim 2, wherein the indicator lamp circuit comprises at least a first MOS transistor, a second MOS transistor, an indicator lamp device, a first indicator lamp power supply, and a second indicator lamp power supply;
the first trigger end of the first MOS tube is connected with the second end of the control unit and used for receiving the second control signal; the first end of the first MOS tube is connected with the power supply of the first indicator lamp; the second end of the first MOS tube is grounded; the second control signal is used for controlling the connection or disconnection of the first end and the second end of the first MOS tube;
the second trigger end of the second MOS tube is connected with the first end of the first MOS tube; the first end of the second MOS tube is connected with the first end of the indicator light device, and the second end of the second MOS tube is grounded;
and the second end of the indicator light device is connected with the second indicator light power supply.
5. The circuit of claim 1, wherein the trigger unit comprises a trigger switch;
the first end of the trigger switch is grounded, and the second end of the trigger switch is connected with a trigger power supply; the trigger switch is used for being switched on or off according to the operation of a user so as to output the trigger signal.
6. The circuit of any one of claims 1 to 5, further comprising a load switch;
the first end of the control unit is connected with the microphone circuit through the load switch;
and the load switch is used for providing working voltage for the microphone circuit according to the trigger signal.
7. The circuit of claim 5,
the third end of the control unit is connected with the signal circuit, and the control unit is used for sending a third control signal to the signal circuit according to the trigger signal; the third control signal is used to indicate the operating state of the microphone circuit.
8. The circuit of claim 5, wherein the control unit is the trigger power supply.
9. The circuit of claim 8, further comprising a switching circuit;
the trigger end of the switch circuit is connected with the fourth end of the control unit and is used for receiving a fourth control signal of the control unit;
the first end of the switch circuit is connected with the output end of the microphone circuit; the second end of the switch circuit is connected with the coder and the decoder;
and the switch circuit is used for controlling the connection state of the microphone circuit and the coder-decoder according to the fourth control signal.
10. An electronic device, characterized in that it comprises a microphone control circuit according to any of claims 1 to 9.
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| CN202010441404.XA CN111556409B (en) | 2020-05-22 | 2020-05-22 | Microphone control circuit and electronic equipment |
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| CN202010441404.XA CN111556409B (en) | 2020-05-22 | 2020-05-22 | Microphone control circuit and electronic equipment |
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Cited By (1)
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| CN111556409B (en) | 2022-04-19 |
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