Mute circuit of microphone

Abstract

The utility model relates to a microphone mute circuit. The microphone mute circuit comprises a plug-in module 100, a first switch module, a voltage division module, a second switch module, a main control port and a module to be powered, the first switch module comprises a triode Q15, a triode Q6, a first microphone interface and a second microphone interface, the triode Q15 is electrically connected with the first microphone interface, the triode Q6 is electrically connected with the second microphone interface, and the triode Q6 is electrically connected with the main control port. The first microphone interface and the second microphone interface are electrically connected with the plug-in module respectively; the voltage dividing module is electrically connected with the triode Q15 and the triode Q6 respectively; the second switch module is electrically connected with the voltage dividing module, and the main control port is electrically connected with the second switch module; the to-be-powered module is electrically connected with the first microphone interface and the second microphone interface. According to the scheme provided by the invention, the microphone can be muted, and meanwhile, the power can be supplied to the microphone.

Description

Technical Field

[0001] The utility model relates to the technical field of microphones, in particular to a microphone mute circuit. Background Art

[0002] Audio systems generate noise when they power on, off, or switch between standby and shutdown modes. This noise is called pop-on-pick (POP) noise. In certain applications, such as conference rooms, microphones lack built-in power supplies and require a XLR cable to connect to the audio system. However, once connected, the microphone is powered on, meaning its indicator lights and other electronic components are turned on. If the microphone is not in use, pop-on noise will be emitted, disrupting its usability. Utility Model Content

[0003] The purpose of the utility model is to overcome the deficiencies in the prior art and provide a microphone mute circuit that can mute the microphone and provide power to the microphone at the same time.

[0004] The purpose of this utility model is achieved through the following technical solutions:

[0005] In a first aspect, the present application provides a microphone mute circuit, comprising: a plug-in module; a first switch module, the first switch module comprising a transistor Q15, a transistor Q6, a first microphone interface and a second microphone interface, the transistor Q15 being electrically connected to the first microphone interface, the transistor Q6 being electrically connected to the second microphone interface, the first microphone interface and the second microphone interface being electrically connected to the plug-in module respectively; a voltage divider module, the voltage divider module being electrically connected to the transistor Q15 and the transistor Q6 respectively; a second switch module, the second switch module being electrically connected to the voltage divider module, a main control port, the main control port being electrically connected to the second switch module; and a module to be powered, the module to be powered being electrically connected to the first microphone interface and the second microphone interface respectively.

[0006] The second switch module includes a resistor R8, a resistor R4, a transistor Q4 and a resistor R30. The first end of the resistor R8 is electrically connected to the main control port, the second end of the resistor R8 is electrically connected to the first end of the resistor R4, the second end of the resistor R8 is also electrically connected to the transistor Q4, the second end of the resistor R4 is grounded, and the transistor Q4 is electrically connected to the first end of the resistor R30.

[0007] The voltage divider module includes a resistor R24 ​​and a resistor R9. The first end of the resistor R24 ​​is electrically connected to the second end of the resistor R30. The second end of the resistor R24 ​​is electrically connected to the first end of the resistor R9. The second end of the resistor R9 is electrically connected to the transistor Q6.

[0008] The voltage divider module further includes a resistor R23 and a resistor R10, wherein a first end of the resistor R23 is electrically connected to a second end of the resistor R30, a second end of the resistor R23 is electrically connected to a first end of the resistor R10, and a second end of the resistor R10 is electrically connected to the transistor Q15.

[0009] The voltage divider module further includes a capacitor C45 , a first end of the capacitor C45 is electrically connected to the second end of the resistor R30 , and a second end of the capacitor C45 is grounded.

[0010] The plug-in module includes a resistor R50 and a resistor R57. A first end of the resistor R50 is electrically connected to the first microphone interface, and a first end of the resistor R57 is electrically connected to the second microphone interface.

[0011] The plug-in module further includes an audio interface, which is electrically connected to the second end of the resistor R57 and the second end of the resistor R50 respectively.

[0012] The module to be powered includes a resistor R38 and a resistor R36 . A first end of the resistor R38 is electrically connected to the first microphone interface, and a first end of the resistor R36 is electrically connected to the second microphone interface.

[0013] The power supply module also includes a voltage regulator tube Z1 and a capacitor C60. The first end of the voltage regulator tube Z1 is electrically connected to the second end of the resistor R38 and the second end of the resistor R36 respectively, and the second end of the voltage regulator tube Z1 is grounded. The first end of the capacitor C60 is electrically connected to the first end of the voltage regulator tube Z1, and the second end of the capacitor C60 is grounded.

[0014] The module to be powered further includes a power supply interface, and the power supply interface is electrically connected to the first end of the capacitor C60.

[0015] Compared with the prior art, the present invention has at least the following advantages:

[0016] The main control port can be connected to an external chip, which can be electrically connected to a mechanical switch or a touchpad. When the main control port receives an operation from the mechanical switch or the touchpad, a high potential will be generated to turn on the second switch module. After the action of the voltage divider module, the transistor Q15 and the transistor Q6 will be turned on, thereby causing a signal short circuit between the first microphone interface and the second microphone interface, thereby muting the microphone while also powering the microphone. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following briefly introduces the drawings required for use in the embodiments.

[0018] Figure 1Schematic diagram of the structure of a microphone mute circuit in one embodiment of the present invention;

[0019] Figure 2 2 is a structural diagram of another implementation of a microphone mute circuit in an embodiment of the present invention. DETAILED DESCRIPTION

[0020] The following describes embodiments of the present application in more detail with reference to the accompanying drawings. Although the accompanying drawings illustrate embodiments of the present application, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments described herein. Rather, these embodiments are provided to make the present application more thorough and complete, and to fully convey the scope of the present application to those skilled in the art.

[0021] It should be understood that although the terms "first", "second", "third", etc. may be used in this application to describe various information, this information should not be limited to these terms. These terms are only used to distinguish information of the same type from each other. For example, without departing from the scope of this application, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0022] Unless otherwise expressly specified or limited, the terms "mounted," "connected," "connect," "fixed," and the like should be interpreted broadly. For example, they may refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0023] The technical solutions of the embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0024] See also Figure 1 and Figure 2A microphone mute circuit includes: a plug-in module 100, a first switch module 200, a voltage divider module 300, a second switch module 400, a main control port 500 and a power supply module 600. The first switch module 200 includes a transistor Q15, a transistor Q6, a first microphone interface and a second microphone interface. The transistor Q15 is electrically connected to the first microphone interface, the transistor Q6 is electrically connected to the second microphone interface, and the first microphone interface and the second microphone interface are respectively electrically connected to the plug-in module 100; the voltage divider module 300 is electrically connected to the transistor Q15 and the transistor Q6; the second switch module 400 is electrically connected to the voltage divider module 300, and the main control port 500 is electrically connected to the second switch module 400; the power supply module 600 is electrically connected to the first microphone interface and the second microphone interface.

[0025] It should be noted that the polarity of the first microphone interface is negative, and the polarity of the second microphone interface is positive. The main control port can be connected to an external chip, which can be electrically connected to a mechanical switch or touchpad. When the main control port receives an operation of the mechanical switch or touchpad, it generates a high potential to turn on the second switch module. After the voltage divider module works, transistors Q15 and Q6 are turned on, thereby short-circuiting the signals of the first and second microphone interfaces. This can achieve the purpose of muting the microphone while also providing power to the microphone.

[0026] See also Figure 2 In one embodiment, the second switch module 400 includes a resistor R8, a resistor R4, a transistor Q4 and a resistor R30, a first end of the resistor R8 is electrically connected to the main control port, a second end of the resistor R8 is electrically connected to the first end of the resistor R4, the second end of the resistor R8 is also electrically connected to the transistor Q4, the second end of the resistor R4 is grounded, and the transistor Q4 is electrically connected to the first end of the resistor R30.

[0027] It should be noted that the resistors R8, R4 and R30 are bias resistors. Furthermore, the external chip of the main control port will output a high potential to turn on the transistor Q4.

[0028] See also Figure 2In one embodiment, the voltage divider module 300 includes a resistor R24 ​​and a resistor R9. The first end of the resistor R24 ​​is electrically connected to the second end of the resistor R30, the second end of the resistor R24 ​​is electrically connected to the first end of the resistor R9, and the second end of the resistor R9 is electrically connected to the transistor Q6. Specifically, the voltage divider module 300 also includes a resistor R23 and a resistor R10. The first end of the resistor R23 is electrically connected to the second end of the resistor R30, the second end of the resistor R23 is electrically connected to the first end of the resistor R10, and the second end of the resistor R10 is electrically connected to the transistor Q15. Specifically, the voltage divider module 300 also includes a capacitor C45. The first end of the capacitor C45 is electrically connected to the second end of the resistor R30, and the second end of the capacitor C45 is grounded.

[0029] It should be noted that the resistors R24, R9, R23 and R10 are all voltage divider resistors to turn on the transistors Q15 and Q6. The capacitor C45 is a filter capacitor.

[0030] See also Figure 2 In one embodiment, the plug-in module 100 includes a resistor R50 and a resistor R57 , wherein a first end of the resistor R50 is electrically connected to the first microphone interface, and a first end of the resistor R57 is electrically connected to the second microphone interface.

[0031] It should be noted that the resistor R50 and the resistor R57 play the role of voltage division and current limiting.

[0032] See also Figure 2 In one embodiment, the plug-in module 100 further includes an audio interface, which is electrically connected to the second end of the resistor R57 and the second end of the resistor R50 respectively.

[0033] It should be noted that the audio interface is a 48V phantom XLR interface for external speakers.

[0034] See also Figure 2 In one embodiment, the module to be powered 600 includes a resistor R38 and a resistor R36 , a first end of the resistor R38 is electrically connected to the first microphone interface, and a first end of the resistor R36 is electrically connected to the second microphone interface.

[0035] It should be noted that the resistors R38 and R36 serve to protect the circuit.

[0036] See also Figure 2 In one embodiment, the power supply module further includes a voltage regulator tube Z1 and a capacitor C60, the first end of the voltage regulator tube Z1 is electrically connected to the second end of the resistor R38 and the second end of the resistor R36 respectively, the second end of the voltage regulator tube Z1 is grounded, the first end of the capacitor C60 is electrically connected to the first end of the voltage regulator tube Z1, and the second end of the capacitor C60 is grounded.

[0037] It should be noted that the voltage regulator Z1 plays the role of stabilizing the voltage and protecting the circuit.

[0038] See also Figure 2 In one embodiment, the module to be powered 600 further includes a power supply interface, which is electrically connected to the first end of the capacitor C60.

[0039] It should be noted that the power supply interface is used for electronic components such as the indicator light on the external microphone.

[0040] The principle of this circuit is explained below:

[0041] For example, when the microphone is temporarily unavailable, you can press the mechanical switch or touchpad to cause the main control port external chip to generate a high voltage, turning on transistor Q4. The voltage divider then turns on transistors Q15 and Q6, short-circuiting the signals between the first and second microphone interfaces, thus eliminating the need for sound. Because the signal is short-circuited, current is still output to the power module, turning on electronic components such as the indicator light on the microphone.

[0042] The scheme of the present application has been described in detail above with reference to the accompanying drawings. In the above embodiments, the descriptions of each embodiment have their own emphasis. For parts that are not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments. Those skilled in the art should also be aware that the actions and modules involved in the description are not necessarily required for this application. In addition, it is understood that the steps in the method of the embodiment of the present application can be adjusted in order, combined and deleted according to actual needs, and the modules in the device of the embodiment of the present application can be combined, divided and deleted according to actual needs.

[0043] The embodiments of the present application have been described above. The above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is selected to best explain the principles of the embodiments, their practical applications, or improvements to the technology in the market, or to enable other persons skilled in the art to understand the embodiments disclosed herein.

Claims

1. A microphone mute circuit, characterized in that: include: Plug-in modules; a first switch module, the first switch module including a transistor Q15, a transistor Q6, a first microphone interface, and a second microphone interface, the transistor Q15 being electrically connected to the first microphone interface, the transistor Q6 being electrically connected to the second microphone interface, and the first microphone interface and the second microphone interface being electrically connected to the plug-in module respectively; A voltage dividing module, the voltage dividing module is electrically connected to the transistor Q15 and the transistor Q6 respectively; a second switch module, the second switch module being electrically connected to the voltage dividing module; a main control port, the main control port being electrically connected to the second switch module; A module to be powered is electrically connected to the first microphone interface and the second microphone interface respectively.

2. The microphone mute circuit according to claim 1, wherein: The second switch module includes a resistor R8, a resistor R4, a transistor Q4 and a resistor R30. The first end of the resistor R8 is electrically connected to the main control port, the second end of the resistor R8 is electrically connected to the first end of the resistor R4, the second end of the resistor R8 is also electrically connected to the transistor Q4, the second end of the resistor R4 is grounded, and the transistor Q4 is electrically connected to the first end of the resistor R30.

3. The microphone mute circuit according to claim 2, wherein: The voltage divider module includes a resistor R24 ​​and a resistor R9. The first end of the resistor R24 ​​is electrically connected to the second end of the resistor R30. The second end of the resistor R24 ​​is electrically connected to the first end of the resistor R9. The second end of the resistor R9 is electrically connected to the transistor Q6.

4. The microphone mute circuit according to claim 2, wherein: The voltage divider module further includes a resistor R23 and a resistor R10, wherein a first end of the resistor R23 is electrically connected to a second end of the resistor R30, a second end of the resistor R23 is electrically connected to a first end of the resistor R10, and a second end of the resistor R10 is electrically connected to the transistor Q15.

5. The microphone mute circuit according to claim 2, wherein: The voltage divider module further includes a capacitor C45 , a first end of the capacitor C45 is electrically connected to the second end of the resistor R30 , and a second end of the capacitor C45 is grounded.

6. The microphone mute circuit according to claim 1, wherein: The plug-in module includes a resistor R50 and a resistor R57. A first end of the resistor R50 is electrically connected to the first microphone interface, and a first end of the resistor R57 is electrically connected to the second microphone interface.

7. The microphone mute circuit according to claim 6, wherein: The plug-in module further includes an audio interface, which is electrically connected to the second end of the resistor R57 and the second end of the resistor R50 respectively.

8. The microphone mute circuit according to claim 1, wherein: The module to be powered includes a resistor R38 and a resistor R36 . A first end of the resistor R38 is electrically connected to the first microphone interface, and a first end of the resistor R36 is electrically connected to the second microphone interface.

9. The microphone mute circuit according to claim 8, wherein: The power supply module also includes a voltage regulator tube Z1 and a capacitor C60. The first end of the voltage regulator tube Z1 is electrically connected to the second end of the resistor R38 and the second end of the resistor R36 respectively, and the second end of the voltage regulator tube Z1 is grounded. The first end of the capacitor C60 is electrically connected to the first end of the voltage regulator tube Z1, and the second end of the capacitor C60 is grounded.

10. The microphone mute circuit according to claim 9, wherein: The module to be powered further includes a power supply interface, and the power supply interface is electrically connected to the first end of the capacitor C60.

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