CN210670431U - Wireless microphone - Google Patents
Wireless microphone Download PDFInfo
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- CN210670431U CN210670431U CN201921825606.3U CN201921825606U CN210670431U CN 210670431 U CN210670431 U CN 210670431U CN 201921825606 U CN201921825606 U CN 201921825606U CN 210670431 U CN210670431 U CN 210670431U
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Abstract
The utility model relates to a wireless microphone, which comprises a sound pickup circuit, a high-frequency oscillation circuit and a buffer high-discharge circuit; the high-frequency oscillation circuit generates carrier frequency signals of an FM frequency band, the sound pickup circuit converts the sound signals into electric signals and modulates the carrier frequency signals, and the buffer high-discharge circuit amplifies the modulated carrier frequency signals and transmits the amplified signals to the air through an antenna so as to be used by audio playing equipment with an FM frequency band sound receiving function for sound receiving and playing; an electric signal output by the electret microphone is coupled by a first capacitor and then output to a high-frequency oscillation circuit so as to separate a low-frequency signal and improve the tone quality, the first resistor and the second resistor are used for pulling up, and the second capacitor is used for decoupling; the realization circuit is simple, the cost is high, the volume is small, and the applicability is wide.
Description
Technical Field
The utility model relates to a microphone technical field, more specifically say, relate to a wireless microphone.
Background
When a microphone needs to be used at a longer distance, a microphone transmitter is usually inserted into the existing microphone, and a microphone receiver is inserted into terminal playing equipment, so that the point-to-point wireless use of the microphone is realized; however, the mode needs to be used in a matched mode, the microphone emitter and the microphone receiver need to be configured in advance, and the use of a user is very inconvenient; and the terminal playing device usually has a broadcast function of receiving FM frequency band, most of the existing microphones can not be directly wirelessly connected with the terminal playing device with FM frequency band radio receiving function, and further the cost is high.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model lies in, to the above-mentioned defect of prior art, provide a circuit simply, with low costs, small can carry out wireless connection's wireless microphone with the terminal playback device who has FM frequency channel radio reception function.
The utility model provides a technical scheme that its technical problem adopted is:
a wireless microphone is constructed to include a sound pickup circuit and a high-frequency oscillation circuit, and a buffer high-discharge circuit; wherein the sound pickup circuit is connected with the high-frequency oscillation circuit, and the high-frequency oscillation circuit is connected with the buffer high-discharge circuit; the high-frequency oscillation circuit is used for generating carrier frequency signals in an FM frequency band, the sound pickup circuit is used for converting sound signals into electric signals and modulating the carrier frequency signals, and the buffer high-discharge circuit is used for amplifying the modulated carrier frequency signals and transmitting the carrier frequency signals through an antenna;
the sound pickup circuit comprises a resident microphone and a first capacitor; a pin 1 of the electret microphone is connected with the first capacitor and the first resistor, and the other end of the first resistor is connected with the anode of a power supply; the other end of the first capacitor is connected with a second capacitor and a second resistor, the other end of the second capacitor is grounded, and the other end of the second resistor is connected with the positive electrode of the power supply; the other end of the first capacitor is connected with the high-frequency oscillation circuit.
The wireless microphone of the present invention, wherein the high frequency oscillating circuit includes a first triode, an adjustable capacitor, a third capacitor and an inductor; the base electrode of the first triode is connected with the other end of the first capacitor, the collector electrode of the first triode is connected with the adjustable capacitor, the other end of the adjustable capacitor is connected with the positive electrode of the power supply, the third capacitor is connected with the collector electrode and the emitter electrode of the first triode in parallel, the emitter electrode of the first triode is connected with a third resistor, and the other end of the third resistor is grounded; the 1 pin of the inductor is connected with the collector of the first triode, the 2 pins of the inductor are connected with the positive electrode of the power supply and are also connected with a fourth capacitor, the other end of the fourth capacitor is grounded, and the 3 pins of the inductor are connected with the buffer high-discharge circuit.
The wireless microphone of the present invention, wherein the buffer high-discharge circuit includes a second triode and a fifth capacitor; the base electrode of the second triode is connected with the fifth capacitor and is also connected with a fourth resistor, the other end of the fifth capacitor is connected with the 3 pins of the inductor, and the other end of the fourth resistor is connected with the anode of the power supply; and the collector of the second triode is connected with a fifth resistor and the antenna, the other end of the fifth resistor is connected with the anode of the power supply, and the emitter of the second triode is grounded.
Wireless microphone, wherein, the power is the battery, the battery still is connected with sixth electric capacity, sixth electric capacity with the positive pole and the negative pole of battery are parallelly connected.
The beneficial effects of the utility model reside in that: the high-frequency oscillation circuit generates carrier frequency signals of an FM frequency band, the sound pickup circuit converts the sound signals into electric signals and modulates the carrier frequency signals, and the buffer high-discharge circuit amplifies the modulated carrier frequency signals and transmits the amplified signals to the air through an antenna so as to be used by audio playing equipment with an FM frequency band sound receiving function for sound receiving and playing; an electric signal output by the electret microphone is coupled by a first capacitor and then output to a high-frequency oscillation circuit so as to separate a low-frequency signal and improve the tone quality, the first resistor and the second resistor are used for pulling up, and the second capacitor is used for decoupling; the realization circuit is simple, the cost is high, the volume is small, and the applicability is wide.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the present invention will be further described below with reference to the accompanying drawings and embodiments, wherein the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained without inventive work according to the drawings:
fig. 1 is a circuit diagram of a wireless microphone according to a preferred embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, a clear and complete description will be given below with reference to the technical solutions of the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.
The wireless microphone of the preferred embodiment of the present invention is shown in fig. 1; comprises a sound pick-up circuit 10, a high-frequency oscillation circuit 20 and a buffer high-discharge circuit 30; the sound pickup circuit 10 is connected to the high-frequency oscillation circuit 20, and the high-frequency oscillation circuit 20 is connected to the buffer high-discharge circuit 30; the high-frequency oscillation circuit 20 is configured to generate a carrier frequency signal in an FM band, the sound pickup circuit 10 is configured to convert a sound signal into an electrical signal and modulate the carrier frequency signal, and the buffer high-frequency discharge circuit 30 amplifies the modulated carrier frequency signal and emits the amplified carrier frequency signal through the antenna ANT;
the sound pickup circuit 10 includes a resident microphone U1 and a first capacitance C1; a pin 1 of the electret microphone U1 is connected with a first capacitor C1 and a first resistor R1, and the other end of the first resistor R1 is connected with the anode of a power supply; the other end of the first capacitor C1 is connected with a second capacitor C2 and a second resistor R2, the other end of the second capacitor C2 is grounded, and the other end of the second resistor R2 is connected with the anode of a power supply; the other end of the first capacitor C1 is connected to the high-frequency oscillation circuit 20;
the high-frequency oscillation circuit 20 generates carrier frequency signals in an FM frequency band, the sound pickup circuit 10 converts the sound signals into electric signals and modulates the carrier frequency signals, and the buffer high-voltage circuit 30 amplifies the modulated carrier frequency signals and transmits the amplified carrier frequency signals to the air through an antenna ANT for audio playing equipment with an FM frequency band sound receiving function to perform sound receiving and playing; the electrical signal output by the electret microphone is coupled by a first capacitor C1 and then output to the high-frequency oscillation circuit 20 to separate low-frequency signals and improve the sound quality, a first resistor R1 and a second resistor R2 are used for pulling up, and a second capacitor C2 is used for decoupling; the realization circuit is simple, the cost is high, the volume is small, and the applicability is wide.
As shown in fig. 1, the high-frequency oscillation circuit 20 includes a first transistor Q1, an adjustable capacitor VC1, a third capacitor C4, and an inductor L1; the base electrode of the first triode Q1 is connected with the other end of the first capacitor C1, the collector electrode of the first triode Q1 is connected with the adjustable capacitor VC1, the other end of the adjustable capacitor VC1 is connected with the positive electrode of the power supply, the third capacitor C4 is connected with the collector electrode and the emitter electrode of the first triode Q1 in parallel, the emitter electrode of the first triode Q1 is connected with a third resistor R3, and the other end of the third resistor R3 is grounded; a pin 1 of the inductor L1 is connected with a collector of the first triode Q1, a pin 2 of the inductor L1 is connected with the positive electrode of the power supply and is also connected with a fourth capacitor C5, the other end of the fourth capacitor C5 is grounded, and a pin 3 of the inductor L1 is connected with the buffer high-discharge circuit 30; the circuit is simple, the cost is low, and the volume is small; the center frequency can be changed by adjusting the adjustable capacitor VC1, and the adjustment is carried out within the range of 88-108 MHz of the FM frequency band.
As shown in fig. 1, the buffer high-discharge circuit 30 includes a second transistor Q2 and a fifth capacitor C6; the base of the second triode Q2 is connected with a fifth capacitor C6 and also connected with a fourth resistor R4, the other end of the fifth capacitor C6 is connected with pin 3 of an inductor L1, and the other end of the fourth resistor R4 is connected with the anode of the power supply; a collector of the second triode Q2 is connected with a fifth resistor R5 and an antenna ANT, the other end of the fifth resistor R5 is connected with the positive electrode of the power supply, and an emitter of the second triode Q2 is grounded; the circuit is simple, the cost is low, and the volume is small.
As shown in fig. 1, the power supply is a battery BAT1, the battery BAT1 is further connected with a sixth capacitor C7, and the sixth capacitor C7 is connected in parallel with the positive electrode and the negative electrode of the battery BAT 1; the requirement of using the microphone wirelessly is met.
It will be understood that modifications and variations can be made by persons skilled in the art in light of the above teachings and all such modifications and variations are considered to be within the scope of the invention as defined by the following claims.
Claims (4)
1. A wireless microphone includes a sound pickup circuit, a high frequency oscillation circuit, and a buffer high-discharge circuit; wherein the sound pickup circuit is connected to the high frequency oscillation circuit, and the high frequency oscillation circuit is connected to the buffer high-discharge circuit; the high-frequency oscillation circuit is used for generating carrier frequency signals in an FM frequency band, the sound pickup circuit is used for converting sound signals into electric signals and modulating the carrier frequency signals, and the buffer high-discharge circuit is used for amplifying the modulated carrier frequency signals and transmitting the carrier frequency signals through an antenna;
the sound pickup circuit comprises a resident microphone and a first capacitor; a pin 1 of the electret microphone is connected with the first capacitor and the first resistor, and the other end of the first resistor is connected with the anode of a power supply; the other end of the first capacitor is connected with a second capacitor and a second resistor, the other end of the second capacitor is grounded, and the other end of the second resistor is connected with the positive electrode of the power supply; the other end of the first capacitor is connected with the high-frequency oscillation circuit.
2. The wireless microphone according to claim 1, wherein the high-frequency oscillation circuit includes a first transistor, an adjustable capacitor, a third capacitor, and an inductor; the base electrode of the first triode is connected with the other end of the first capacitor, the collector electrode of the first triode is connected with the adjustable capacitor, the other end of the adjustable capacitor is connected with the positive electrode of the power supply, the third capacitor is connected with the collector electrode and the emitter electrode of the first triode in parallel, the emitter electrode of the first triode is connected with a third resistor, and the other end of the third resistor is grounded; the 1 pin of the inductor is connected with the collector of the first triode, the 2 pins of the inductor are connected with the positive electrode of the power supply and are also connected with a fourth capacitor, the other end of the fourth capacitor is grounded, and the 3 pins of the inductor are connected with the buffer high-discharge circuit.
3. The wireless microphone of claim 2, wherein the buffer high-discharge circuit comprises a second triode and a fifth capacitor; the base electrode of the second triode is connected with the fifth capacitor and is also connected with a fourth resistor, the other end of the fifth capacitor is connected with the 3 pins of the inductor, and the other end of the fourth resistor is connected with the anode of the power supply; and the collector of the second triode is connected with a fifth resistor and the antenna, the other end of the fifth resistor is connected with the anode of the power supply, and the emitter of the second triode is grounded.
4. The wireless microphone according to any one of claims 1 to 3, wherein the power source is a storage battery, and a sixth capacitor is connected to the storage battery and is connected in parallel with a positive electrode and a negative electrode of the storage battery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921825606.3U CN210670431U (en) | 2019-10-28 | 2019-10-28 | Wireless microphone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921825606.3U CN210670431U (en) | 2019-10-28 | 2019-10-28 | Wireless microphone |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210670431U true CN210670431U (en) | 2020-06-02 |
Family
ID=70819801
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921825606.3U Active CN210670431U (en) | 2019-10-28 | 2019-10-28 | Wireless microphone |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210670431U (en) |
-
2019
- 2019-10-28 CN CN201921825606.3U patent/CN210670431U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 518000 Guangdong city of Shenzhen province Futian District Che Kung Temple Tairan nine road Haisong building B-1303 Patentee after: Shenzhen smart Micro Intelligent Technology Co., Ltd Address before: 518000 Guangdong city of Shenzhen province Futian District Che Kung Temple Tairan nine road Haisong building B-1303 Patentee before: JWIPC TECHNOLOGY DEVELOPMENT Ltd. |
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| CP01 | Change in the name or title of a patent holder |