CN210202051U - Microphone mute circuit and system for eliminating puff sound of earphone - Google Patents
Microphone mute circuit and system for eliminating puff sound of earphone Download PDFInfo
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- CN210202051U CN210202051U CN201921367700.9U CN201921367700U CN210202051U CN 210202051 U CN210202051 U CN 210202051U CN 201921367700 U CN201921367700 U CN 201921367700U CN 210202051 U CN210202051 U CN 210202051U
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Abstract
A microphone mute circuit and a system for eliminating sound puff of an earphone are provided, wherein the microphone mute circuit comprises a connection module, a voltage division module, a first switch module, a delay module, a second switch module and a key switch, is connected with audio equipment through the connection module to receive power supply voltage, outputs conduction voltage to sequentially conduct the first switch module and the second switch module after the voltage division module divides the power supply voltage, and then is in communication connection with the microphone after the audio equipment sequentially passes through the connection module, the voltage division module and the second switch module; when a user presses the key switch, the first switch module and the second switch module are switched off in a delayed mode due to the arrangement of the delay module, so that the microphone can enter a mute state stably. Therefore, the time delay module is added, so that the mute function can be smoothly used during the call; and the two parties in the conversation can not hear puff sound, thereby improving the experience of the user.
Description
Technical Field
The present application belongs to the technical field of electronic circuits, and in particular, to a microphone muting circuit and system for eliminating pop sound of an earphone.
Background
The conventional earphone microphone mute circuit is generally implemented by the following two ways: 1. the microphone circuit is connected in series by adopting the toggle switch, and the microphone circuit is disconnected by manually controlling the toggle switch, so that the function of muting is achieved; 2. the microphone circuit and the ground wire are connected in parallel after the toggle switch is connected in series with the electrolytic capacitor of hundreds of microfarads, and when the toggle switch is switched off, an alternating current signal generated by the microphone is subjected to alternating current grounding by the electrolytic capacitor, so that the effect of silence is achieved.
However, in the first method, when the toggle switch is connected in series to the microphone circuit for the mute function, pop sound is generated at the moment when the toggle switch is turned on and off. In the second mode, when the toggle switch and the large-capacity electrolytic capacitor are connected in series and then are combined between the microphone circuit and the ground wire, the mode can also generate puff sound, although the noise is small, the noise signal can be generated when the volume is particularly large, and the silencing is not thorough; and the large-capacity electrolytic capacitor has larger volume, which is not beneficial to the miniaturization of the earphone.
Therefore, the existing microphone mute circuit technology has the problems that pop sound can be generated at the moment when the toggle switch is switched on and off, and complete mute cannot be realized.
SUMMERY OF THE UTILITY MODEL
In view of this, the present disclosure provides a microphone muting circuit for eliminating pop sound of an earphone, and aims to solve the problem that the pop sound generated at the moment when a toggle switch is turned on and off cannot be completely muted in the conventional microphone muting circuit technology.
A first aspect of the embodiments of the present application provides a microphone muting circuit for eliminating pop sound of earphones, connected to an audio device, the microphone muting circuit comprising:
a coupling module connected to the audio device and configured to receive and transmit a supply voltage;
the voltage division module is connected with the connection module and is configured to output a conducting voltage after voltage division processing is carried out on the power supply voltage;
the first switch module is connected with the voltage division module, is configured to receive the conducting voltage and conducts the first switch module;
the delay module is connected with the voltage division module and the first switch module and is configured to transmit the breakover voltage when the first switch module is turned on;
the second switch module is connected with the time delay module and the microphone and is configured to receive the conducting voltage and conduct the second switch module, so that the audio equipment is in communication connection with the microphone after sequentially passing through the connection module, the voltage division module and the second switch module; and
the key switch is connected with the voltage division module and is configured to be turned on or off according to whether a user presses the key switch;
the time delay module is further configured to turn off the first switch module and the second switch module in a time delay manner when the key switch is pressed by a user, so that the microphone can enter a mute state stably.
Preferably, the microphone muting circuit further comprises:
and the energy storage module is connected with the connecting module and the voltage dividing module, and is configured to receive the conducting voltage output by the connecting module and charge the conducting voltage when a user presses the key switch.
Preferably, the coupling module comprises a plug for plugging with a plug of the audio device in a socket manner.
Preferably, the voltage dividing module includes:
the circuit comprises a first resistor, a second resistor, a fourth resistor, a fifth resistor and a seventh resistor;
the first resistor, the second resistor, the fifth resistor, the fourth resistor and the seventh resistor are connected in sequence, the first resistor is connected with the first switch module, and the seventh resistor is connected with the connection module.
Preferably, the first switch module includes:
a first triode and a second capacitor;
the first end of the second capacitor and the base electrode of the first triode are connected with the voltage division module, the emitting electrode of the first triode is connected with the second end of the second capacitor, and the collecting electrode of the first triode is connected with the time delay module.
Preferably, the delay module includes:
a first capacitor and a third resistor;
the first end of the first capacitor is connected with the first switch module, the second end of the first capacitor is connected with the first end of the third resistor, and the second end of the third resistor is connected with the second switch module.
Preferably, the second switch module includes:
a second triode and a ninth resistor;
the base electrode of the second triode and the first end of the ninth resistor are connected with the delay module, the emitting electrode of the second triode is connected with the second end of the ninth resistor, and the collecting electrode of the second triode is connected with the microphone.
Preferably, the energy storage module comprises:
a sixth resistor, a fifth capacitor and a sixth capacitor;
the first end of the sixth resistor is connected with the connection module, the second end of the sixth resistor, the first end of the fifth capacitor and the first end of the sixth capacitor are grounded, and the second end of the fifth capacitor is connected with the second end of the sixth capacitor.
A second aspect of the present application provides a microphone muting system for eliminating pop sound of earphones, comprising:
an audio device configured to output a supply voltage; and
and a microphone mute circuit as described above, coupled to the audio device.
Preferably, the audio device comprises a personal computer, a tablet computer, a mobile phone and a sound box.
The microphone mute circuit comprises a connection module, a voltage division module, a first switch module, a delay module, a second switch module and a key switch, is connected with audio equipment through the connection module to receive power supply voltage, and outputs conducting voltage to sequentially conduct the first switch module and the second switch module after the voltage division module divides the power supply voltage, so that the audio equipment is in communication connection with the microphone after sequentially passing through the connection module, the voltage division module and the second switch module; and when a user presses the key switch, the first switch module and the second switch module are turned off in a delayed mode, so that the microphone can enter a mute state stably. Therefore, the time delay module is added, so that the mute function can be smoothly used during the call; and the sound can not be heard and popped by both parties of the conversation, the experience of the user is improved, and the problems that the sound can be popped and cannot be completely muted at the moment of switching on and off of a toggle switch in the conventional microphone muting circuit technology are solved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic block diagram illustrating a microphone muting circuit for eliminating pop sound of an earphone according to an embodiment of the present application;
fig. 2 is a schematic block diagram illustrating a microphone muting circuit for eliminating pop sound of an earphone according to another embodiment of the present application;
fig. 3 is a circuit diagram illustrating an exemplary microphone muting circuit for eliminating pop sound of the earphones corresponding to fig. 2.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
The microphone mute circuit comprises a connection module, a voltage division module, a first switch module, a delay module, a second switch module and a key switch, is connected with audio equipment through the connection module to receive power supply voltage, and outputs conducting voltage to sequentially conduct the first switch module and the second switch module after the voltage division module divides the power supply voltage, so that the audio equipment is in communication connection with the microphone after sequentially passing through the connection module, the voltage division module and the second switch module; and when a user presses the key switch, the first switch module and the second switch module are turned off in a delayed mode, so that the microphone can enter a mute state stably. Therefore, the time delay module is added, so that the mute function can be smoothly used during the call; and the two parties in the conversation can not hear puff sound, thereby improving the experience of the user.
Referring to fig. 1, a schematic block diagram of a microphone muting circuit for eliminating pop sound of an earphone according to an embodiment of the present application shows only portions related to the embodiment for convenience of description, and is described as follows:
a microphone mute circuit for eliminating pop sound of an earphone is connected with an audio device 20, and comprises a connection module 101, a voltage division module 102, a first switch module 103, a delay module 104, a second switch module 105 and a key switch 106.
The link module 101 is connected to the audio device 20, and is configured to receive and transmit a supply voltage. The audio device 20 includes a personal computer, a tablet computer, a mobile phone, and a sound box, and when the connection module 101 is electrically connected to the audio device 20, the audio device 20 outputs a power supply voltage to the connection module 101, so that the connection module 101 transmits the power supply voltage to other functional modules of the microphone mute circuit.
The voltage dividing module 102 is connected to the connection module 101, and configured to output a turn-on voltage after performing voltage dividing processing on the power supply voltage.
For example, the voltage dividing module 102 is configured to divide the power supply voltage, and output a turn-on voltage to turn on the first switch module 103.
The first switch module 103 is connected to the voltage dividing module 102, and configured to receive a turn-on voltage and turn on itself.
The delay module 104 is connected to the voltage dividing module 102 and the first switch module 103, and configured to transmit the on-state voltage when the first switch module 103 is turned on.
And, the delay module 104 is further configured to delay the first switch module 103 and the second switch module 105 to turn off when the user presses the key switch 106, so as to smoothly enter the microphone 30 into the mute state.
Specifically, when the key switch 106 is turned off, the first switch module 103 and the second switch module 105 are in a conducting state, and the microphone 30 is in communication connection with the audio device 20; once the user presses the key switch 106, the first switch module 103 and the second switch module 105 are turned off in a delayed manner by the delay module 104, so that the microphone 30 is stably switched to the mute state and no pop sound is generated.
The second switch module 105 is connected to the delay module 104 and the microphone 30, and configured to receive the turn-on voltage and turn on itself, so that the audio device 20 is connected to the microphone 30 through the connection module 101, the voltage dividing module 102, and the second switch module 105 in sequence.
The key switch 106 is connected to the voltage divider module 102 and configured to be turned on or off according to whether a user presses it.
Specifically, when the key switch 106 is pressed, the key switch 106 is closed; when the key switch 106 is not pressed, the key switch 106 is turned off.
In the module structure schematic of the microphone muting circuit 10 shown in fig. 1, the audio device 20 is connected to receive a power supply voltage through the connection module 101, and outputs a conducting voltage to conduct the first switch module 103 and the second switch module 105 in sequence after the power supply voltage is divided by the voltage dividing module 102, and then the audio device 20 is in communication connection with the microphone 30 after passing through the connection module 101, the voltage dividing module 102, and the second switch module 105 in sequence; and when the user presses the key switch 106, the first switch module 103 and the second switch module 105 are turned off in a delayed manner due to the arrangement of the delay module 104, so that the microphone 30 is smoothly turned into a mute state. Therefore, the delay module 104 is added, so that the mute function can be smoothly used during the call; and the two parties in the conversation can not hear puff sound, thereby improving the experience of the user.
As an alternative embodiment, the audio device 20 is a mobile phone, and after signal conversion by the microphone mute circuit, the microphone 30 can accurately implement two-way conversation with an external communication device through the audio device 20, and the microphone mute circuit 10 can be universally applied to different industrial technologies by using a mute function during conversation.
As an alternative embodiment, the audio device 20 is a sound box; the audio device 20 can realize an audio playing function, so that the microphone mute circuit and the audio device 20 realize a multifunctional communication function, and can ensure that the microphone 30 cannot generate puff sound when being connected to the audio device 20, thereby improving the audio playing quality of the audio device 20.
As an alternative implementation, fig. 2 shows another module structure of a microphone muting circuit for eliminating pop sound of earphones according to another embodiment of the present application, and compared with the module structure of the microphone muting circuit shown in fig. 1, the microphone muting circuit in fig. 2 further includes: an energy storage module 107.
The energy storage module 107 is connected to the connection module 101 and the voltage dividing module 102, and configured to receive the on-state voltage output by the connection module 101 and perform charging when the user presses the key switch 106.
Fig. 3 shows an exemplary circuit diagram of a microphone muting circuit for canceling pop sound of the earphone corresponding to fig. 2, wherein for convenience of illustration, only the parts related to the embodiment are shown and detailed as follows:
as an embodiment of the present application, the above-mentioned connection module 101 includes a plug for plugging with the audio device 20 by means of a socket. Specifically, the audio device 20 employs a 3.5mm plug and the link module 101 employs a 3.5 receptacle, and thus, the 3.5 receptacle is plug-connected with the 3.5mm plug.
As an embodiment of the present invention, the voltage dividing module 102 includes a first resistor R1, a second resistor R2, a fourth resistor R4, a fifth resistor R5, and a seventh resistor R7;
the first resistor R1, the second resistor R2, the fifth resistor R5, the fourth resistor R4 and the seventh resistor R7 are connected in sequence, the first resistor R1 is connected to the first switch module 103, and the seventh resistor R7 is connected to the link module 101.
As an embodiment of the present application, the first switch module 103 includes a first transistor Q1 and a second capacitor C2;
the first end of the second capacitor C2 and the base of the first transistor Q1 are connected to the voltage divider module 102, the emitter of the first transistor Q1 is connected to the second end of the second capacitor C2, and the collector of the first transistor Q1 is connected to the delay module 104.
As an embodiment of the present application, the delay module 104 includes a first capacitor C1 and a third resistor R3;
the first end of the first capacitor C1 is connected to the first switch module 103, the second end of the first capacitor C1 is connected to the first end of the third resistor R3, and the second end of the third resistor R3 is connected to the second switch module 105.
As an embodiment of the present application, the second switching module 105 includes a second transistor Q2 and a ninth resistor R9;
the base of the second triode Q2 and the first end of the ninth resistor R9 are connected to the delay module 104, the emitter of the second triode Q2 is connected to the second end of the ninth resistor R9, and the collector of the second triode Q2 is connected to the microphone 30.
As an embodiment of the present application, the key switch 106 is implemented by a mechanical switch SW 6.
As an embodiment of the present invention, the energy storage module 107 includes a sixth resistor R6, a fifth capacitor C5, and a sixth capacitor C6;
the first end of the sixth resistor R6 is connected to the link module 101, the second end of the sixth resistor R6 is connected to the ground of the first end of the fifth capacitor C5 and the first end of the sixth capacitor C6, and the second end of the fifth capacitor C5 is connected to the second end of the sixth capacitor C6.
The microphone mute circuit cancels a large-capacity electrolytic capacitor, adopts a multilayer ceramic capacitor with very small volume, and can save more volume; and the pop sound generated at the moment of switching on and switching off by using a mute switch is removed by utilizing a delay module consisting of a resistance capacitor and a triode.
The application also provides a microphone silence system that the earphone is popped out sound, includes:
an audio device 20 configured to output a supply voltage; and
connected to the audio device 20 is a microphone mute circuit as described above.
Specifically, the audio device 20 includes a personal computer, a tablet computer, a mobile phone, and a speaker.
The operation principle of the above-mentioned microphone muting circuit and system for eliminating pop sound of earphones is described below with reference to fig. 1 to 3 as follows:
when the 3.5 jack is plugged into the audio jack of the computer, the mechanical switch SW6 is initially off and the circuit is in mute off mode. At this time, the computer provides a voltage of about 2V to the J1pin4 through the microphone pin on the 3.5mm plug, and the voltage pulls the base voltage of the first transistor Q1 high through the seventh resistor R7, the fourth resistor R4, the fifth resistor R5, the second resistor R2 and the first resistor R1, so that the collector of the first transistor Q1 is pulled low, which makes the emitter of the second transistor Q2 forward biased with respect to the base, and the second transistor Q2 is also turned on. Therefore, the J1pin4 is connected to the microphone 30 through the seventh resistor R7 and the second transistor Q2, and the microphone 30 operates normally.
When the mechanical switch SW6 changes from off to off. The base of the first transistor Q1 is pulled low through a first resistor R1 and a second resistor R2. However, due to the second capacitor C2, the fall time of the base stage of the first transistor Q1 is delayed, and the base stage is pulled low, causing the first transistor Q1 to turn off. The J1pin4 charges the first capacitor C1 through the seventh resistor R7, the ninth resistor R9 and the third resistor R3, so that the collector voltage of the first triode Q1 gradually increases, and the second triode Q2 gradually cuts off. The voltage of the J1pin4 gradually increases, and the sixth capacitor C6 and the fifth capacitor C5 are charged through the fourth resistor R4 in the process of increasing. The rising process of the J1pin4 is changed into a slower process, the circuit changes the mute switch into a level which changes instantly in the whole process, the delayed switch circuit is changed into a gradually changed voltage, and the puff generated by the transient change of the direct current level caused by the switching is greatly reduced.
Therefore, in the embodiment of the microphone muting circuit and the system for eliminating the puff sound of the earphone, the microphone muting circuit includes the connection module, the voltage dividing module, the first switch module, the delay module, the second switch module and the key switch, the connection module is connected with the audio device to receive the power supply voltage, the voltage dividing module divides the power supply voltage, the conduction voltage is output to sequentially conduct the first switch module and the second switch module, and then the audio device is in communication connection with the microphone through the connection module, the voltage dividing module and the second switch module sequentially; when a user presses the key switch, the first switch module and the second switch module are switched off in a delayed mode due to the arrangement of the delay module, so that the microphone can enter a mute state stably. Therefore, the time delay module is added, so that the mute function can be smoothly used during the call; the two parties in the conversation can not hear puff sound, thereby improving the experience of the user; in addition, the microphone mute circuit cancels a large-capacity electrolytic capacitor, adopts a multilayer ceramic capacitor with a very small volume, can save more volume, and solves the problems that the existing microphone mute circuit technology generates puff sound at the moment of switching on and off a toggle switch and cannot realize thorough mute.
Various embodiments are described herein for various devices, circuits, apparatuses, systems, and/or methods. Numerous specific details are set forth in order to provide a thorough understanding of the overall structure, function, manufacture, and use of the embodiments as described in the specification and illustrated in the accompanying drawings. However, it will be understood by those skilled in the art that the embodiments may be practiced without such specific details. In other instances, well-known operations, components and elements have been described in detail so as not to obscure the embodiments in the description. It will be appreciated by those of ordinary skill in the art that the embodiments herein and shown are non-limiting examples, and thus, it can be appreciated that the specific structural and functional details disclosed herein may be representative and do not necessarily limit the scope of the embodiments.
Reference throughout the specification to "various embodiments," "in an embodiment," "one embodiment," or "an embodiment," etc., means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment. Thus, appearances of the phrases "in various embodiments," "in some embodiments," "in one embodiment," or "in an embodiment," or the like, in places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. Thus, a particular feature, structure, or characteristic illustrated or described in connection with one embodiment may be combined, in whole or in part, with features, structures, or characteristics of one or more other embodiments without presuming that such combination is not an illogical or functional limitation. Any directional references (e.g., plus, minus, upper, lower, upward, downward, left, right, leftward, rightward, top, bottom, above …, below …, vertical, horizontal, clockwise, and counterclockwise) are used for identification purposes to aid the reader's understanding of the present disclosure, and do not create limitations, particularly as to the position, orientation, or use of the embodiments.
Although certain embodiments have been described above with a certain degree of particularity, those skilled in the art could make numerous alterations to the disclosed embodiments without departing from the scope of this disclosure. Joinder references (e.g., attached, coupled, connected, and the like) are to be construed broadly and may include intermediate members between a connection of elements and relative movement between elements. Thus, connection references do not necessarily imply that two elements are directly connected/coupled and in a fixed relationship to each other. The use of "for example" throughout this specification should be interpreted broadly and used to provide non-limiting examples of embodiments of the disclosure, and the disclosure is not limited to such examples. It is intended that all matter contained in the above description or shown in the accompanying drawings shall be interpreted as illustrative only and not limiting. Changes in detail or structure may be made without departing from the disclosure.
The present invention is not intended to be limited to the particular embodiments shown and described, but is to be accorded the widest scope consistent with the principles and novel features herein disclosed.
Claims (10)
1. A microphone muting circuit for eliminating pop sound of an earphone, connected to an audio device, the microphone muting circuit comprising:
a coupling module connected to the audio device and configured to receive and transmit a supply voltage;
the voltage division module is connected with the connection module and is configured to output a conducting voltage after voltage division processing is carried out on the power supply voltage;
the first switch module is connected with the voltage division module, is configured to receive the conducting voltage and conducts the first switch module;
the delay module is connected with the voltage division module and the first switch module and is configured to transmit the breakover voltage when the first switch module is turned on;
the second switch module is connected with the time delay module and the microphone and is configured to receive the conducting voltage and conduct the second switch module, so that the audio equipment is in communication connection with the microphone after sequentially passing through the connection module, the voltage division module and the second switch module; and
the key switch is connected with the voltage division module and is configured to be turned on or off according to whether a user presses the key switch;
the time delay module is further configured to turn off the first switch module and the second switch module in a time delay manner when the key switch is pressed by a user, so that the microphone can enter a mute state stably.
2. The microphone muting circuit according to claim 1, characterized in that the microphone muting circuit further comprises:
and the energy storage module is connected with the connecting module and the voltage dividing module, and is configured to receive the conducting voltage output by the connecting module and charge the conducting voltage when a user presses the key switch.
3. The microphone muting circuit according to claim 1, characterized in that the coupling module comprises a plug for plugging with a plug of the audio device in the manner of a socket.
4. The microphone muting circuit according to claim 1, characterized in that the voltage dividing module comprises:
the circuit comprises a first resistor, a second resistor, a fourth resistor, a fifth resistor and a seventh resistor;
the first resistor, the second resistor, the fifth resistor, the fourth resistor and the seventh resistor are connected in sequence, the first resistor is connected with the first switch module, and the seventh resistor is connected with the connection module.
5. The microphone muting circuit according to claim 1, characterized in that the first switching module comprises:
a first triode and a second capacitor;
the first end of the second capacitor and the base electrode of the first triode are connected with the voltage division module, the emitting electrode of the first triode is connected with the second end of the second capacitor, and the collecting electrode of the first triode is connected with the time delay module.
6. The microphone muting circuit according to claim 1, characterized in that the delay module comprises:
a first capacitor and a third resistor;
the first end of the first capacitor is connected with the first switch module, the second end of the first capacitor is connected with the first end of the third resistor, and the second end of the third resistor is connected with the second switch module.
7. The microphone muting circuit according to claim 1, characterized in that the second switching module comprises:
a second triode and a ninth resistor;
the base electrode of the second triode and the first end of the ninth resistor are connected with the delay module, the emitting electrode of the second triode is connected with the second end of the ninth resistor, and the collecting electrode of the second triode is connected with the microphone.
8. The microphone muting circuit according to claim 2, characterized in that the energy storage module comprises:
a sixth resistor, a fifth capacitor and a sixth capacitor;
the first end of the sixth resistor is connected with the connection module, the second end of the sixth resistor, the first end of the fifth capacitor and the first end of the sixth capacitor are grounded, and the second end of the fifth capacitor is connected with the second end of the sixth capacitor.
9. A microphone mute system for eliminating puff sound of earphones, comprising:
an audio device configured to output a supply voltage; and
connected to said audio device, a microphone muting circuit according to any one of the preceding claims 1-8.
10. The microphone muting system according to claim 9, characterized in that the audio devices comprise a personal computer, a tablet computer, a mobile phone and a loudspeaker box.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921367700.9U CN210202051U (en) | 2019-08-21 | 2019-08-21 | Microphone mute circuit and system for eliminating puff sound of earphone |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921367700.9U CN210202051U (en) | 2019-08-21 | 2019-08-21 | Microphone mute circuit and system for eliminating puff sound of earphone |
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| CN210202051U true CN210202051U (en) | 2020-03-27 |
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| CN201921367700.9U Active CN210202051U (en) | 2019-08-21 | 2019-08-21 | Microphone mute circuit and system for eliminating puff sound of earphone |
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