CN213783583U

CN213783583U - Control circuit for microphone

Info

Publication number: CN213783583U
Application number: CN202120067524.8U
Authority: CN
Inventors: 侯守山
Original assignee: Shenzhen Hanqingda Technology Co Ltd
Current assignee: Shenzhen Hanqingda Technology Co Ltd
Priority date: 2021-01-11
Filing date: 2021-01-11
Publication date: 2021-07-23
Anticipated expiration: 2031-01-11

Abstract

The utility model discloses a control circuit for miaow head, including power module, switch module, miaow head received signal module, signal amplification module, circuit oscillation module, signal output module, power module connects switch module, and switch module connects miaow head received signal module, signal amplification module, circuit oscillation module, and miaow head received signal module connects signal amplification module, and signal amplification module connects circuit oscillation module, and circuit oscillation module connects signal output module, compares with prior art, the beneficial effects of the utility model are that: the size of electric capacity in this scheme passes through the switch change oscillating circuit, changes the frequency of the alternating current signal who produces in the circuit to reach the frequency that changes output signal, make the application scope of miaow head wider, the practicality increases.

Description

Control circuit for microphone

Technical Field

The utility model relates to a miaow head circuit specifically is a control circuit for miaow head.

Background

The microphone is an acoustic-to-electrical conversion device (also called transducer or transducer), which is a device directly opposite the horn (electrical → acoustic). The microphone is an input and the loudspeaker is an output. The microphone is also called a microphone, a mike, a microphone, a mike liner and the like. The microphone is classified into a fully directional type (omni directional) and a uni-directional type (omni directional) in which the sensitivity is substantially the same for sounds from different angles. The microphone head is designed by adopting the Pressure-induced principle, and the diaphragm only receives the Pressure from the outside. The method is commonly used in recording projects needing to record the whole environmental sound; or when the sound source moves, the situation that good sound reception is expected to be kept; the type of a neckband microphone worn by the speaker while speaking is also included. The omni-directional type has a disadvantage in that it is easy to receive noise from the surrounding environment. The single directional microphone is mainly designed by using the principle of Pressure Gradient (Pressure Gradient). The vibrating diaphragm receives the pressure of the front side and the back side through a small hole in the back of the microphone cavity. Therefore, the diaphragm is stressed differently in different directions, and the microphone has directivity. And thus, directional microphones all have a near-talk effect.

The existing microphone cannot adjust the frequency of the output audio frequency, so that the microphone only has one frequency, the applicability is low, and improvement is needed.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a control circuit for miaow head to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme:

the utility model provides a control circuit for miaow head, includes power module, switch module, miaow head received signal module, signal amplification module, circuit oscillation module, signal output module, power module connects the switch module, and switch module connects miaow head received signal module, signal amplification module, circuit oscillation module, and miaow head received signal module connects signal amplification module, and signal amplification module connects circuit oscillation module, and signal output module is connected to the circuit oscillation module.

As a further aspect of the present invention: the microphone comprises a power supply module E1, a switch module S1, a resistor R1 and a diode D1, a microphone signal receiving module R2 and a microphone M, a signal amplifying module C1, a resistor R3, an inductor L1, a capacitor C2 and a triode V1, a circuit oscillating module C3, a capacitor C4, a resistor R5, a triode V2, a capacitor C6, a capacitor C7, a capacitor C8, an inductor L2 and a switch S2, and a signal output module C5 and an antenna T.

The positive electrode of a power supply E1 is connected with a switch S1, the other end of the switch S1 is connected with a resistor R1, a resistor R2, a resistor R3, an inductor L1, a capacitor C2, a resistor R4, an inductor L2 and a switch S2, the other end of the resistor R1 is connected with the positive electrode of a diode D1, the negative electrode of a diode D1 is connected with the negative electrode of the power supply E1, the other end of the resistor R2 is connected with a microphone M and a capacitor C1, the other end of the microphone M is connected with the negative electrode of the power supply E1, the other end of the capacitor C1 is connected with the other end of a resistor R3 and the base of a triode V1, the other end of the inductor L1 is connected with the other end of a capacitor C2, the collector of a triode V1 and a capacitor C3, and the emitter of the triode V1 is connected with the negative electrode of the power supply E1.

The other end of the capacitor C3 is connected with the other end of the capacitor C4, the other end of the resistor R4 and the base of the triode V2, the other end of the capacitor C4 is connected with the negative electrode of the power supply E1, the emitter of the triode V2 is connected with the resistor R5 and the capacitor C5, the other end of the resistor R5 is connected with the negative electrode of the power supply E1, the other end of the capacitor C5 is connected with the antenna T, the capacitor C8, the capacitor C7, the capacitor C6, the other end of the inductor L2 and the collector of the triode V2, the other end of the capacitor C6 is connected with the interface No. 1 of the switch S2, the other end of the capacitor C7 is connected with the interface No. 2 of the switch S2, and the other end of the capacitor C8 is connected with the interface No. 3 of the switch S2.

As a further aspect of the present invention: the diode D1 is a light emitting diode.

As a further aspect of the present invention: the triode V1 and the triode V2 are NPN triodes.

As a further aspect of the present invention: the triode V1 amplifies the electric signal output by the microphone, and the triode V2 amplifies the alternating current signals generated by the inductor L2, the capacitor C6, the capacitor C7 and the capacitor C8.

As a further aspect of the present invention: the triode V2, the inductor L2, the capacitor C6, the capacitor C7 and the capacitor C8 form an oscillating circuit.

As a further aspect of the present invention: the capacitance of the capacitor C6 is smaller than that of the capacitor C7, and the capacitance of the capacitor C7 is smaller than that of the capacitor C8.

Compared with the prior art, the beneficial effects of the utility model are that: the size of electric capacity in this scheme passes through the switch change oscillating circuit, changes the frequency of the alternating current signal who produces in the circuit to reach the frequency that changes output signal, make the application scope of miaow head wider, the practicality increases.

Drawings

Fig. 1 is a schematic diagram of a control circuit for a microphone.

Fig. 2 is a circuit diagram of a control circuit for a microphone.

Fig. 3 is a pin diagram of a transistor.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, rather than all embodiments, and all other embodiments obtained by a person of ordinary skill in the art without creative work belong to the protection scope of the present invention based on the embodiments of the present invention.

Example 1: referring to fig. 1, a control circuit for a microphone, a power module for providing a power supply, a switch module for conducting and prompting a circuit, a microphone receiving signal module for receiving a sound signal and converting the sound signal into an electrical signal, a signal amplifying module for amplifying the electrical signal emitted by the microphone, a circuit oscillating module for forming an alternating current by the circuit, and a signal output module for outputting the microphone amplified signal, the power module is connected with the switch module, the switch module is connected with the microphone receiving signal module, the signal amplifying module and the circuit oscillating module, the microphone receiving signal module is connected with the signal amplifying module, the signal amplifying module is connected with the circuit oscillating module, and the circuit oscillating module is connected with the signal output module.

As shown in fig. 2, the power module is composed of a power source E1, the switch module is composed of a switch S1, a resistor R1 and a diode D1, the microphone signal receiving module is composed of a resistor R2 and a microphone M, the signal amplifying module is composed of a capacitor C1, a resistor R3, an inductor L1, a capacitor C2 and a transistor V1, the circuit oscillating module is composed of a capacitor C3, a capacitor C4, a resistor R5, a transistor V2, a capacitor C6, a capacitor C7, a capacitor C8, an inductor L2 and a switch S2, and the signal output module is composed of a capacitor C5 and an antenna T.

The positive electrode of a power supply E1 is connected with a switch S1, the power supply E1 is a direct-current power supply, the other end of a switch S1 is connected with a resistor R1, a resistor R2, a resistor R3, an inductor L1, a capacitor C2, a resistor R4, an inductor L2 and a switch S2, the other end of the resistor R1 is connected with the positive electrode of a diode D1, the diode D1 is a light-emitting diode, a light-emitting display circuit is conducted, the negative electrode of the diode D1 is connected with the negative electrode of the power supply E1, the other end of the resistor R1 is connected with the negative electrode of the microphone M and the capacitor C1, the other end of the capacitor C1 is connected with the negative electrode of the power supply E1, the other end of the capacitor C1 is connected with the other end of the resistor R1 and the base of a triode V1, the other end of the inductor L1 is connected with the collector of the capacitor C1, the collector of the triode V1 and the emitter of the power supply E1 is connected with the cathode of the power supply E1.

The other end of the capacitor C3 is connected with the other end of the capacitor C4 and the other end of the resistor R4, the base of the triode V2, the other end of the capacitor C4 is connected with the negative electrode of the power supply E1, the emitter of the triode V2 is connected with the resistor R5 and the capacitor C5, the other end of the resistor R5 is connected with the negative electrode of the power supply E1, the other end of the capacitor C5 is connected with the antenna T, the capacitor C8, the capacitor C7, the capacitor C6, the other end of the inductor L2 and the collector of the triode V2, the other end of the capacitor C6 is connected with the interface No. 1 of the switch S2, the other end of the capacitor C7 is connected with the interface No. 2 of the switch S2, the other end of the capacitor C8 is connected with the interface No. 3 of the switch S2, the inductor L2, the capacitor C6, the capacitor C7, the capacitor C8 and the triode V2 form an oscillation circuit, and the change of the output frequency of the oscillation circuit is achieved by changing different interfaces of the switch S2.

The utility model discloses a theory of operation is: when the switch S1 is closed, the circuit is conducted, the diode D1 emits light and displays to play a role in prompting, when the switch S2 is on the interface No. 1, the inductor L2 and the capacitor C6 generate induced potential due to instant connection of the circuit, the inductor L2 releases energy to the capacitor C6, the capacitor C6 transmits the part of energy to the inductor L2 again, so that the energy is weakened, the triode V2 is in a state, the part of changed energy passes through the emitter-resistor R5 of the triode V2-the capacitor C4-the base of the triode V2 to amplify the part of energy, finally the part of signal is stabilized to form an oscillation circuit, when a sound signal exists, the microphone M converts the sound signal into an electric signal and outputs the electric signal to the base of the triode V1, the triode V1 amplifies the signal, then the amplified signal is transmitted to the base of the triode V2, and the amplified signal is output to the antenna through the emitter-capacitor C5 of the triode V2 to transmit the antenna, the frequency of the transmitted signal is determined by an inductor L2, a capacitor C6 and a triode V2, and the frequency is changed by changing the interface position of a switch S2.

Example 2, on the basis of example 1, fig. 3 is a pin diagram of a transistor, which is also known as a transistor, which promotes and brings about a "solid state revolution", thereby promoting the worldwide semiconductor electronics industry. As a main component, the communication tool is firstly applied to communication tools in time and generally, and great economic benefits are generated. Since transistors drastically change the structure of electronic circuits, integrated circuits and large-scale integrated circuits have come into play, and it has become practical to manufacture high-precision devices such as high-speed electronic computers.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. A control circuit for a microphone comprises a power supply module, a switch module, a microphone signal receiving module, a signal amplification module, a circuit oscillation module and a signal output module, and is characterized in that the power supply module is connected with the switch module, the switch module is connected with the microphone signal receiving module, the signal amplification module and the circuit oscillation module, the microphone signal receiving module is connected with the signal amplification module, the signal amplification module is connected with the circuit oscillation module, the circuit oscillation module is connected with the signal output module, the power supply module is composed of a power supply E1, the switch module is composed of a switch S1, a resistor R1 and a diode D1, the microphone signal receiving module is composed of a resistor R2 and a microphone M, the signal amplification module is composed of a capacitor C1, a resistor R3, an inductor L1, a capacitor C2 and a triode V1, and the circuit oscillation module is composed of a capacitor C3, a capacitor C4, a resistor R5, a triode V2 and a circuit oscillation module, The signal output module comprises a capacitor C6, a capacitor C7, a capacitor C8, an inductor L2 and a switch S2, and the signal output module comprises a capacitor C5 and an antenna T;

the positive electrode of a power supply E1 is connected with a switch S1, the other end of the switch S1 is connected with a resistor R1, a resistor R2, a resistor R3, an inductor L1, a capacitor C2, a resistor R4, an inductor L2 and a switch S2, the other end of the resistor R1 is connected with the positive electrode of a diode D1, the negative electrode of a diode D1 is connected with the negative electrode of the power supply E1, the other end of the resistor R2 is connected with a microphone M and a capacitor C1, the other end of the microphone M is connected with the negative electrode of the power supply E1, the other end of a capacitor C1 is connected with the other end of a resistor R3 and the base of a triode V1, the other end of an inductor L1 is connected with the other end of a capacitor C2, the collector of a triode V1 and a capacitor C3, and the emitter of the triode V1 is connected with the negative electrode of the power supply E1;

2. The control circuit for a microphone according to claim 1, wherein the diode D1 is a light emitting diode.

3. The control circuit for microphone according to claim 1, wherein the transistor V1 and the transistor V2 are NPN transistors.

4. The control circuit for the microphone according to claim 3, wherein the transistor V1 amplifies the electrical signal outputted from the microphone, and the transistor V2 amplifies the AC signals generated by the inductor L2, the capacitor C6, the capacitor C7 and the capacitor C8.

5. The control circuit for the microphone according to claim 4, wherein the triode V2, the inductor L2, the capacitor C6, the capacitor C7 and the capacitor C8 form an oscillating circuit.

6. The control circuit for microphone according to claim 1, wherein the capacitance of the capacitor C6 is smaller than the capacitance of the capacitor C7, and the capacitance of the capacitor C7 is smaller than the capacitance of the capacitor C8.