CN211406213U - Microphone power supply switching circuit and microphone - Google Patents
Microphone power supply switching circuit and microphone Download PDFInfo
- Publication number
- CN211406213U CN211406213U CN202020135645.7U CN202020135645U CN211406213U CN 211406213 U CN211406213 U CN 211406213U CN 202020135645 U CN202020135645 U CN 202020135645U CN 211406213 U CN211406213 U CN 211406213U
- Authority
- CN
- China
- Prior art keywords
- voltage
- circuit
- microphone
- resistor
- capacitor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Circuit For Audible Band Transducer (AREA)
Abstract
A microphone power supply switching circuit and a microphone are provided, which are connected with a first voltage and a second voltage through an interface component; the voltage stabilizing circuit generates a third voltage according to the first voltage; the power selection switch assembly comprises an input end of the power selection switch assembly, a first output end of the power selection switch assembly and a second output end of the power selection switch assembly, and the input end and the two output ends are switched to be connected according to user operation; the regulating circuit generates a driving voltage according to the second voltage or the third voltage and transmits an audio signal to the bus; the microphone assembly detects ambient sound to generate an audio signal; the coupling circuit carries out blocking processing on the first voltage and communicates the audio signal to the first output end of the power selection switch assembly, and when the voltage corresponding to different input power supplies is achieved, different power supply voltages can be freely switched without additionally connecting a transformer or other equipment, so that the microphone can normally pick up sound.
Description
Technical Field
The utility model belongs to the technical field of microphone equipment, especially, relate to a microphone power supply switching circuit and microphone.
Background
The microphone is also called microphone, a kind of electroacoustic equipment, belongs to microphone, it is a transducer of sound-electricity conversion, and utilizes the sound wave to act on electroacoustic element to produce voltage, then converts it into electric energy, and can be used in various public address equipments. With the explosion of the media age, the demand of live broadcasting is increasing, and the use of microphones is also very popular, and the common microphones are usually configured in 5V or 48V. The microphone has branch wireless microphone or wired microphone, and wireless microphone convenient to carry but tone quality and dynamic effect all are less than wired microphone, so in the live broadcast, in order to ensure better tone quality and dynamic experience, use wired microphone mostly. In the wired use environment, the sound mixing console or the phantom power connecting line is accessed through the cannon head interface.
At present, when a traditional microphone is used, working voltage is fixed to be a certain voltage, namely, the working voltage can only correspond to one kind of working voltage, when the voltage of another kind of input power supply is correspondingly accessed, a transformer or other voltage transformation equipment needs to be additionally accessed, and if the accessed working voltage does not correspond to the working voltage of the microphone, the microphone cannot normally work.
Therefore, the problem that the microphone can only correspond to one type of service voltage in the traditional technical scheme, and the microphone cannot normally work when another type of power voltage is connected and the service voltage of the microphone does not directly correspond to the service voltage of the microphone exists.
SUMMERY OF THE UTILITY MODEL
In view of this, the embodiment of the present invention provides a microphone power switching circuit and a microphone, which aims to solve the problem that a microphone existing in the conventional technical solution can only correspond to one kind of service voltage, and when the microphone is connected to another kind of power voltage and does not directly correspond to the working voltage of the microphone, the microphone cannot normally work.
The utility model provides a first aspect of the embodiment provides a microphone power supply switching circuit, include:
the interface component is configured to be connected with a first voltage and a second voltage;
the voltage stabilizing circuit is configured to generate a third voltage according to the first voltage;
the power selection switch assembly comprises an input end of the power selection switch assembly connected with the interface assembly, a first output end of the power selection switch assembly connected with the voltage stabilizing circuit and a second output end of the power selection switch assembly connected with the bus, and is configured to switch the connection between the input end and the two output ends according to user operation;
the regulating circuit is connected with the voltage stabilizing circuit and the bus, and is configured to generate a driving voltage according to the second voltage or the third voltage and output an audio signal to the bus;
a microphone assembly connected with the adjusting circuit and configured to detect an ambient sound according to the driving voltage to generate the audio signal;
and the coupling circuit is connected with the power selection switch assembly, the voltage stabilizing circuit and the bus, and is configured to perform blocking processing on the first voltage and communicate the audio signal to a first output end of the power selection switch assembly.
In one embodiment, the voltage stabilizing circuit comprises:
a first voltage transformation circuit configured to transform the first voltage to generate a first transformed voltage;
the first voltage stabilizing component is connected with the first voltage transformation circuit and is configured to stabilize the first conversion voltage to generate first stabilized direct current;
and the second voltage transformation circuit is connected with the first voltage stabilization component and is configured to perform voltage conversion on the first stabilized direct current to generate the third voltage.
In one embodiment, the microphone power switching circuit further includes:
a second voltage stabilizing component connected with the second voltage transformation circuit and the bus and configured to stabilize the second voltage and the third voltage;
the adjusting circuit is specifically configured to generate the driving voltage according to the regulated second voltage or the regulated third voltage, and output the audio signal to the bus.
In one embodiment, the microphone power switching circuit further includes:
a first filtering circuit coupled to the conditioning circuit and the microphone assembly and configured to filter and denoise the audio signal.
In one embodiment, the interface assembly includes a cannon head.
In one embodiment, the first transforming circuit includes: the circuit comprises a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, a first resistor, a second resistor, a third resistor and a fourth resistor;
a first end of the first capacitor is connected with a first end of the first resistor and a first end of the second resistor, a second end of the first resistor is connected with a first end of the second capacitor, a second end of the second capacitor and a second end of the first capacitor are connected with a power ground, a second end of the second resistor is connected with a first end of the fourth resistor, a first end of the fourth capacitor and a first end of the third resistor, a second end of the third resistor is connected with a first end of the third capacitor, and a second end of the third capacitor is connected with the power ground;
the first end of the first capacitor and the first end of the third capacitor are jointly formed into a first voltage input end of the first voltage transformation circuit;
and the second end of the fourth resistor is a first conversion voltage output end of the first voltage transformation circuit.
In one embodiment, the first voltage stabilizing assembly includes: the first resistor, the first capacitor, the first diode and the first triode are connected in series;
a first end of the fifth resistor is connected with a collector of the first triode, a second end of the fifth resistor is connected with a base of the first triode, a first end of the fifth capacitor and a cathode of the first diode, and a second end of the fifth capacitor and an anode of the first diode are connected with a power ground;
a first end of the fifth resistor and a collector of the first triode jointly form a first conversion voltage input end of the first voltage stabilizing component;
and the emission electrode of the first triode is the output end of the first voltage-stabilizing direct current of the first voltage-stabilizing component.
In one embodiment, the second transforming circuit comprises: a sixth resistor and a sixth capacitor;
a first end of the sixth resistor is connected with a first end of the sixth capacitor, and a second end of the sixth capacitor is connected with a power ground;
the first end of the sixth resistor is a first voltage-stabilizing direct-current input end of the second voltage transformation circuit;
and the second end of the sixth resistor is a third voltage output end of the second voltage transformation circuit.
In one embodiment, the power selection switch assembly includes: a gating switch;
the second end of the gating switch and the fifth end of the gating switch are jointly formed as the input end of the power supply selection switch component;
the first end of the gating switch and the fourth end of the gating switch are jointly formed into a second output end of the power selection switch assembly;
the third terminal of the gating switch and the sixth terminal of the gating switch are jointly formed into a first output terminal of the power selection switch assembly.
A second aspect of the embodiments of the present invention provides a microphone, the microphone includes the above-mentioned microphone power supply switching circuit.
The microphone power supply switching circuit is connected with a first voltage and a second voltage through an interface component, a voltage stabilizing circuit converts the first voltage into a third voltage, a power supply selection switch component switches the connection of the input end and two output ends of the power supply selection switch component according to the operation of a user, a regulating circuit generates a driving voltage according to the second voltage or the third voltage, the microphone component detects the environmental sound according to the driving voltage to generate an audio signal, the coupling circuit conducts blocking processing on the first voltage and communicates the audio signal to a first output end of the power supply selection switch component, therefore, when the voltage of different input power supplies is realized, a transformer or other equipment does not need to be additionally connected, different power supply voltages can be freely switched, and different input power supplies can be used, so that the microphone can normally pick up sound.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive labor.
Fig. 1 is a schematic structural diagram of a microphone power switching circuit according to an embodiment of the present invention;
fig. 2 is another schematic structural diagram of a microphone power switching circuit according to an embodiment of the present invention;
fig. 3 is another schematic structural diagram of a microphone power switching circuit according to an embodiment of the present invention;
fig. 4 is another schematic structural diagram of a microphone power switching circuit according to an embodiment of the present invention;
fig. 5 is a schematic circuit diagram of an example of a power switching circuit of a microphone according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in 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 invention and are not intended to limit the invention.
Referring to fig. 1, a schematic structural diagram of a microphone power switching circuit according to an embodiment of the present invention shows only the relevant parts of the embodiment for convenience of description, and the details are as follows:
a microphone power switching circuit comprising: an interface assembly 100, a voltage regulator circuit 11, a power selection switch assembly 12, a regulator circuit 13, a microphone assembly 14, and a coupling circuit 15.
An interface component 100 configured to be switched in a first voltage and a second voltage; a voltage stabilizing circuit 11 configured to generate a third voltage from the first voltage; a power selection switch assembly 12, including an input terminal of the power selection switch assembly 12 connected to the interface assembly 100, a first output terminal of the power selection switch assembly 12 connected to the voltage stabilizing circuit 11, and a second output terminal of the power selection switch assembly 12 connected to the bus 01, configured to switch connection between the input terminal and the two output terminals according to a user operation; a regulating circuit 13 connected to the voltage stabilizing circuit 11 and the bus 01, configured to generate a driving voltage according to the second voltage or the third voltage, and output an audio signal to the bus 01; a microphone assembly 14 connected to the adjusting circuit 13 and configured to detect an ambient sound according to the driving voltage to generate an audio signal; and the coupling circuit 15 is connected with the power selection switch assembly 12, the voltage stabilizing circuit 11 and the bus 01, and is configured to perform blocking processing on the first voltage and communicate the audio signal to a first output end of the power selection switch assembly 12.
In a specific implementation, the interface assembly 100 includes a three-core cannon head. The power supply voltage comprises a first voltage and a second voltage; optionally, the first voltage is 48V, and the second voltage is 2.5V.
When a second voltage (2.5V) is connected through the three-core cannon head, the power selection switch assembly 12 is communicated with the input end of the power selection switch assembly 12 and the second output end of the power selection switch assembly 12 and is transmitted to the adjusting circuit 13 through the bus 01, the adjusting circuit 13 generates a driving voltage according to the second voltage, the microphone assembly 14 detects and collects environmental sounds according to the driving voltage, the adjusting circuit 13 adjusts and controls the microphone assembly 14 to detect and collect the environmental sounds to obtain the sensitivity of the audio signals, the adjusting circuit 13 also outputs the audio signals to the bus 01, and then the audio signals are transmitted to the second output end of the power selection switch assembly 12 through the bus 01; when a first voltage (48V) is connected through the three-core cannon head, the power selection switch assembly 12 switches and communicates the input end of the power selection switch assembly 12 and the first output end of the power selection switch assembly 12 according to user operation, the voltage stabilizing circuit 11 converts the first voltage (48V) into a third voltage (for example, 2 to 4V, optionally, the third voltage is 2.5V), the adjusting circuit 13 generates a driving voltage according to the third voltage, the microphone assembly 14 detects and collects environmental sounds according to the driving voltage, the adjusting circuit 13 further outputs an audio signal to the bus 01, and then the first voltage (48V) is subjected to blocking processing through the coupling circuit 15 and communicated with the audio signal to the first output end of the power selection switch assembly 12.
The embodiment of the utility model provides a when corresponding different input power supply's voltage, need not connect transformer or other equipment in addition, alright with freely switch over different mains voltage, can use different input power supply for the normal pickup work of microphone.
Referring to fig. 2, in one embodiment, the voltage regulator circuit 11 includes: a first transformer circuit 111, a first voltage stabilizing component 112 and a second transformer circuit 113.
A first voltage transformation circuit 111 configured to transform a first voltage to generate a first transformed voltage; a first voltage stabilizing component 112 connected to the first transforming circuit 111 and configured to stabilize the first converted voltage to generate a first stabilized dc current; the second transformer circuit 113 is connected to the first voltage stabilizing component 112 and configured to perform voltage conversion on the first stabilized dc power to generate a third voltage.
In specific implementation, the first voltage (e.g., 48V) is converted into a third voltage (e.g., 2.5V) by the first transformer circuit 111, the first voltage stabilizing component 112 and the second transformer circuit 113 to provide a power supply voltage for the microphone to operate, so that power is supplied to the microphone according to the voltages of a plurality of different input power sources, and the practicability and reliability of the microphone power switching circuit are improved.
Referring to fig. 3, in one embodiment, the microphone power switching circuit further includes: a second voltage regulation assembly 16.
A second voltage stabilizing component 16 connected with the second transforming circuit 113 and the bus 01 and configured to stabilize the second voltage and the third voltage; the adjusting circuit 13 is specifically configured to generate a driving voltage from the regulated second voltage or the regulated third voltage, and output the audio signal to the bus 01.
In specific implementation, the second voltage stabilizing component 16 is connected between the bus 01 and the second transformer circuit 113 and the regulating circuit 13, and performs voltage stabilizing processing on the second voltage and the third voltage to protect the regulating circuit 13 and the microphone component 14 from being damaged by high voltage, so that the regulating circuit 13 can stably and reliably provide correct and stable driving voltage for the microphone component 14, so as to drive the microphone component 14 to stably and reliably detect environmental sound, and further obtain a stable and reliable audio signal.
Referring to fig. 4, in one embodiment, the microphone power switching circuit further includes: a first filter circuit 17.
And the first filtering circuit 17 is connected with the adjusting circuit 13 and the microphone assembly 14 and is configured to filter and reduce the noise of the audio signal.
In specific implementation, the first filter circuit 17 performs filtering and noise reduction processing on the audio signal generated by detecting the environmental sound by the sound microphone assembly 14, so that the adjustment circuit 13 transmits the filtered and noise-reduced audio signal to the bus 01, thereby further improving the working precision and reliability of the microphone.
In one embodiment, referring to fig. 5, the interface assembly 100 includes a three-core cannon head J1, two positive terminals (L, P) of the three-core cannon head J1 are connected to the input terminals of the power selection switch assembly 12, and a ground terminal GND of the three-core cannon head J1 is connected to the power ground.
In one embodiment, referring to fig. 5, the power selection switch assembly 12 includes a gate switch K1.
The second terminal 2 of the gate switch K1 and the fifth terminal 5 of the gate switch K1 are jointly configured as an input terminal of the power selection switch assembly 12, the first terminal 1 of the gate switch K1 and the fourth terminal 4 of the gate switch K1 are jointly configured as a second output terminal of the power selection switch assembly 12, and the third terminal 3 of the gate switch K1 and the sixth terminal 6 of the gate switch K1 are jointly configured as a first output terminal of the power selection switch assembly 12.
In an implementation, referring to fig. 5, the coupling circuit 15 includes a dc blocking capacitor C9. When the interface module 100 is connected to the first voltage, the dc blocking capacitor C9 blocks the first voltage, preventing the first voltage from being transmitted to the second output terminal of the power selection switch module 12, and communicating the audio signal to the first output terminal of the power selection switch module, specifically, communicating the audio signal to the third terminal 3 of the gate switch K1, and then transmitting the audio signal to the three-core cannon head J1.
Referring to fig. 5, in one embodiment, the first transforming circuit 111 includes: the circuit comprises a first capacitor C1, a second capacitor C2, a third capacitor C3, a fourth capacitor C4, a first resistor R1, a second resistor R2, a third resistor R3 and a fourth resistor R4.
A first end of a first capacitor C1 is connected to a first end of a first resistor R1 and a first end of a second resistor R2, a second end of the first resistor R1 is connected to a first end of a second capacitor C2, a second end of a second capacitor C2 and a second end of a first capacitor C1 are connected to a power ground, a second end of a second resistor R2 is connected to a first end of a fourth resistor R4, a first end of a fourth capacitor C4 and a first end of a third resistor R3, a second end of a third resistor R3 is connected to a first end of a third capacitor C3, and a second end of a third capacitor C3 is connected to the power ground.
The first terminal of the first capacitor C1 and the first terminal of the third capacitor C3 are commonly configured as a first voltage input terminal of the first transformer circuit 111.
The second end of the fourth resistor R4 is the first converted voltage output end of the first transforming circuit 111.
Referring to fig. 5, in one embodiment, the first voltage stabilizer 112 includes: a fifth resistor R5, a fifth capacitor C5, a first diode D1, and a first transistor Q1.
A first terminal of the fifth resistor R5 is connected to the collector of the first transistor Q1, a second terminal of the fifth resistor R5 is connected to the base of the first transistor Q1, a first terminal of the fifth capacitor C5 and the cathode of the first diode D1, and a second terminal of the fifth capacitor C5 and the anode of the first diode D1 are connected to ground.
A first terminal of the fifth resistor R5 and a collector of the first transistor Q1 together form a first switched voltage input terminal of the first voltage regulation component 112.
The emitter of the first transistor Q1 is the output of the first regulated dc power of the first voltage regulation component 112.
Referring to fig. 5, in one embodiment, the second transforming circuit 113 includes: a sixth resistor R6 and a sixth capacitor C6.
A first terminal of the sixth resistor R6 is connected to a first terminal of the sixth capacitor C6, and a second terminal of the sixth capacitor C6 is connected to ground.
A first end of the sixth resistor R6 is a first regulated dc input end of the second transformer circuit 113; the second terminal of the sixth resistor R6 is the third voltage output terminal of the second transformer circuit 113.
Referring to fig. 5, in one embodiment, the adjusting circuit 13 includes: a seventh capacitor C7, a seventh resistor R7, a second triode Q2 and a potentiometer R01.
The emitter of the second transistor Q2 is a second voltage input of the regulating circuit 13, a third voltage input of the regulating circuit 13, and an audio signal output of the regulating circuit 13.
An emitter of the second transistor Q2 is connected to the sliding end p of the potentiometer R01 and the first end 1 of the potentiometer R01, a base of the second transistor Q2 is connected to a first end of a seventh resistor R7 and a first end of a seventh capacitor C7, a second end of the seventh resistor R7 and a collector of the second transistor Q2 are connected to the power ground, and a second end of the seventh capacitor C7 is connected to the second end 2 of the potentiometer R01.
A second terminal of the seventh capacitor C7 is an audio signal input terminal of the regulating circuit 13 and a driving voltage output terminal of the regulating circuit 13.
In a specific implementation, the first filter circuit 17 includes a filter capacitor C8.
The working principle of the microphone power switching circuit will be briefly described with reference to fig. 5 as follows:
when a second voltage (2.5V) is connected through the three-core cannon head J1, the input end (the second end 2 of the gate switch K1 and the fifth end 5 of the gate switch K1) of the power selection switch assembly 12 is connected with the three-core cannon head J1 and the second output end (the first end 1 of the gate switch K1 and the fourth end 4 of the gate switch K1) of the power selection switch assembly 12, the second output end of the power selection switch assembly 12 transmits the second voltage to the adjusting circuit 13 through the bus 01, the adjusting circuit 13 generates a driving voltage according to the second voltage to support the microphone MIC of the microphone assembly 14 to perform sound pickup operation, and the adjusting circuit 13 further outputs an audio signal to the bus 01 and outputs the audio signal to the three-core cannon head J1 through the second output end of the power selection switch assembly 12; when a first voltage (48V) is applied through the three-core microphone J1, the power selection switch assembly 12 switches the power selection switch assembly 12 to connect the input terminal (the second terminal 2 of the gate switch K1 and the fifth terminal 5 of the gate switch K1) of the power selection switch assembly 12 and the first output terminal (the third terminal 3 of the gate switch K1 and the sixth terminal 6 of the gate switch K1) of the power selection switch assembly 12 according to a user operation, the first voltage transformation circuit 111, the first voltage stabilization assembly 112 and the second voltage transformation circuit 113 perform voltage transformation on the first voltage (48V) and stabilize the voltage to output a third voltage (2.5V) to the adjustment circuit 13, the adjustment circuit 13 generates a driving voltage according to the third voltage (2.5V) to support the microphone MIC of the microphone assembly 14 for sound pickup operation, the adjustment circuit 13 further outputs an audio signal to the bus 01, and connects the audio signal to the first output terminal (the selection switch assembly 12) through the bus 01 and the blocking capacitor C9 The third terminal 3 of the switch K1 is turned on) and then output to the three-core cannon J1; when the voltage of different input power supplies is realized, a transformer or other equipment does not need to be connected additionally, and different input power supplies can be used for supplying power to the microphone so as to enable the microphone to normally pick up sound.
A second aspect of the embodiments of the present invention provides a microphone, which includes the above-mentioned embodiments of the microphone power switching circuit.
The embodiment of the utility model provides a when can realizing corresponding different input power supply's voltage, need not connect transformer or other equipment in addition, alright with freely switch over different mains voltage, can use different input power supply for the normal pickup work of microphone.
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.
It will be clear to those skilled in the art that, for convenience and simplicity of description, the foregoing functional circuits, units and modules are merely illustrated in terms of their division, and in practical applications, the foregoing functional distribution may be implemented by different functional circuits, units and modules as needed, that is, the internal structure of the device may be divided into different functional circuits, units and modules to implement all or part of the above described functions. In addition, specific names of the functional circuits, units and modules are only used for distinguishing one functional circuit from another, and are not used for limiting the protection scope of the present application.
In the above embodiments, the descriptions of the respective embodiments have respective emphasis, and reference may be made to the related descriptions of other embodiments for parts that are not described or illustrated in a certain embodiment.
The above description is only exemplary of the present invention and should not be construed as limiting the present invention, and any modifications, equivalents and improvements made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. A microphone power switching circuit, comprising:
the interface component is configured to be connected with a first voltage and a second voltage;
the voltage stabilizing circuit is configured to generate a third voltage according to the first voltage;
the power selection switch assembly comprises an input end of the power selection switch assembly connected with the interface assembly, a first output end of the power selection switch assembly connected with the voltage stabilizing circuit and a second output end of the power selection switch assembly connected with the bus, and is configured to switch the connection between the input end and the two output ends according to user operation;
the regulating circuit is connected with the voltage stabilizing circuit and the bus, and is configured to generate a driving voltage according to the second voltage or the third voltage and output an audio signal to the bus;
a microphone assembly connected with the adjusting circuit and configured to detect an ambient sound according to the driving voltage to generate the audio signal;
and the coupling circuit is connected with the power selection switch assembly, the voltage stabilizing circuit and the bus, and is configured to perform blocking processing on the first voltage and communicate the audio signal to a first output end of the power selection switch assembly.
2. The microphone power switching circuit of claim 1, wherein the voltage stabilizing circuit comprises:
a first voltage transformation circuit configured to transform the first voltage to generate a first transformed voltage;
the first voltage stabilizing component is connected with the first voltage transformation circuit and is configured to stabilize the first conversion voltage to generate first stabilized direct current;
and the second voltage transformation circuit is connected with the first voltage stabilization component and is configured to perform voltage conversion on the first stabilized direct current to generate the third voltage.
3. The microphone power supply switching circuit according to claim 2, wherein the microphone power supply switching circuit further comprises:
a second voltage stabilizing component connected with the second voltage transformation circuit and the bus and configured to stabilize the second voltage and the third voltage;
the adjusting circuit is specifically configured to generate the driving voltage according to the regulated second voltage or the regulated third voltage, and output the audio signal to the bus.
4. The microphone power switching circuit as claimed in claim 1, wherein the microphone power switching circuit further comprises:
a first filtering circuit coupled to the conditioning circuit and the microphone assembly and configured to filter and denoise the audio signal.
5. The microphone power switching circuit of claim 1 wherein the interface component comprises a three-core cannon head.
6. The microphone power switching circuit of claim 2, wherein the first transforming circuit comprises: the circuit comprises a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, a first resistor, a second resistor, a third resistor and a fourth resistor;
a first end of the first capacitor is connected with a first end of the first resistor and a first end of the second resistor, a second end of the first resistor is connected with a first end of the second capacitor, a second end of the second capacitor and a second end of the first capacitor are connected with a power ground, a second end of the second resistor is connected with a first end of the fourth resistor, a first end of the fourth capacitor and a first end of the third resistor, a second end of the third resistor is connected with a first end of the third capacitor, and a second end of the third capacitor is connected with the power ground;
the first end of the first capacitor and the first end of the third capacitor are jointly formed into a first voltage input end of the first voltage transformation circuit;
and the second end of the fourth resistor is a first conversion voltage output end of the first voltage transformation circuit.
7. The microphone power supply switching circuit of claim 2, wherein the first voltage regulation component comprises: the first resistor, the first capacitor, the first diode and the first triode are connected in series;
a first end of the fifth resistor is connected with a collector of the first triode, a second end of the fifth resistor is connected with a base of the first triode, a first end of the fifth capacitor and a cathode of the first diode, and a second end of the fifth capacitor and an anode of the first diode are connected with a power ground;
a first end of the fifth resistor and a collector of the first triode jointly form a first conversion voltage input end of the first voltage stabilizing component;
and the emission electrode of the first triode is the output end of the first voltage-stabilizing direct current of the first voltage-stabilizing component.
8. The microphone power switching circuit of claim 2, wherein the second transforming circuit comprises: a sixth resistor and a sixth capacitor;
a first end of the sixth resistor is connected with a first end of the sixth capacitor, and a second end of the sixth capacitor is connected with a power ground;
the first end of the sixth resistor is a first voltage-stabilizing direct-current input end of the second voltage transformation circuit;
and the second end of the sixth resistor is a third voltage output end of the second voltage transformation circuit.
9. The microphone power switching circuit as defined in claim 1, wherein the power selection switch assembly comprises: a gating switch;
the second end of the gating switch and the fifth end of the gating switch are jointly formed as the input end of the power supply selection switch component;
the first end of the gating switch and the fourth end of the gating switch are jointly formed into a second output end of the power selection switch assembly;
the third terminal of the gating switch and the sixth terminal of the gating switch are jointly formed into a first output terminal of the power selection switch assembly.
10. A microphone, characterized in that the microphone comprises a microphone power switching circuit according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020135645.7U CN211406213U (en) | 2020-01-20 | 2020-01-20 | Microphone power supply switching circuit and microphone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020135645.7U CN211406213U (en) | 2020-01-20 | 2020-01-20 | Microphone power supply switching circuit and microphone |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211406213U true CN211406213U (en) | 2020-09-01 |
Family
ID=72214928
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020135645.7U Active CN211406213U (en) | 2020-01-20 | 2020-01-20 | Microphone power supply switching circuit and microphone |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211406213U (en) |
-
2020
- 2020-01-20 CN CN202020135645.7U patent/CN211406213U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104469620A (en) | Acoustical product with audio output power adjustable within large range | |
| CN204190934U (en) | The voicefrequency circuit that a kind of power output is adjustable on a large scale and acoustic product | |
| US20140241541A1 (en) | Audio signal adapter device | |
| US20060291672A1 (en) | Condenser microphone | |
| US8873777B2 (en) | Variable directivity condenser microphone | |
| US10382852B2 (en) | Condenser microphone circuit | |
| CN211406213U (en) | Microphone power supply switching circuit and microphone | |
| CN1678134A (en) | Polarization voltage setting of microphones | |
| US20110123047A1 (en) | Audio processing system for an audio output device | |
| US20100254542A1 (en) | Reporter-headset, studio-headset, or broadcast-headset | |
| CN209914063U (en) | Microphone, integrated circuit thereof and electronic equipment | |
| CN208353533U (en) | A kind of microphone circuit and the earphone with decrease of noise functions | |
| CN212992564U (en) | General microphone with volume adjusting function | |
| CN112073885A (en) | Bone conduction hearing aid | |
| CN110324770A (en) | A kind of microphone and its integrated circuit, electronic equipment | |
| CN220043648U (en) | Audio signal amplifying circuit | |
| CN115051624B (en) | Signal acquisition circuit and camera equipment | |
| CN221081521U (en) | Modularized microphone system | |
| US20210120325A1 (en) | Microphone system | |
| CN211061915U (en) | Feedback adjusting circuit for rotary-variable excitation amplitude and electric automobile | |
| CN214481230U (en) | Sound equipment | |
| CN202634680U (en) | Earphone with automatic sensing function | |
| CN216905274U (en) | Microphone circuit | |
| CN211580199U (en) | Sound box parameter adjusting system | |
| CN201131008Y (en) | Television earphone squelch circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |