CN204206431U - A kind of wireless microphone circuit - Google Patents
A kind of wireless microphone circuit Download PDFInfo
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- CN204206431U CN204206431U CN201420665372.1U CN201420665372U CN204206431U CN 204206431 U CN204206431 U CN 204206431U CN 201420665372 U CN201420665372 U CN 201420665372U CN 204206431 U CN204206431 U CN 204206431U
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Abstract
The utility model discloses a kind of wireless microphone circuit, comprise the first electric capacity, the second electric capacity, the 3rd electric capacity, the 4th electric capacity, the 5th electric capacity, the 6th electric capacity, the 7th electric capacity, the first resistance, the second resistance, the 3rd resistance, the 4th resistance, the 5th resistance, inductance coil, the first triode, the second triode, sound conducting apparatus, power supply, switch and antenna.Wireless communication distance of the present utility model can reach 50 meters, and the slight sound of speech can picked up beyond three meters, microphone, there is highly sensitive, that stable work in work, antijamming capability are strong, applicability is strong and low in energy consumption feature, simultaneously, circuit structure of the present utility model is simple, components and parts used are few, reduce cost of manufacture, are conducive to promoting and using.
Description
Technical field
The utility model relates to a kind of radio communication device, particularly relates to a kind of wireless microphone circuit.
Background technology
For in whole sound system, first important step is exactly microphone, now be widely used in teaching, in radio broadcasting, stage performance, hearing aids and all kinds of voice-operated device, meanwhile, microphone is divided into again cable microphone and wireless microphone, and wherein common wireless microphone also can be divided into two kinds, one is hand-hold wireless microphone, and one is button-shaped microphone; But the price comparison of a lot of top grade of existing wireless microphone kind is expensive, and the sensitivity of low-grade wireless microphone is low, poor anti jamming capability, and permissible call distance is far away not.
Utility model content
The purpose of this utility model is just to provide a kind of wireless microphone circuit to solve the problem.
The utility model is achieved through the following technical solutions above-mentioned purpose:
The utility model comprises the first electric capacity, second electric capacity, 3rd electric capacity, 4th electric capacity, 5th electric capacity, 6th electric capacity, 7th electric capacity, first resistance, second resistance, 3rd resistance, 4th resistance, 5th resistance, inductance coil, first triode, second triode, sound conducting apparatus, power supply, switch and antenna, the first end of described inductance coil simultaneously with the first end of described second electric capacity, the first end of described first resistance, the first end of described second resistance, the first end of described 5th resistance, the first end of described 4th resistance is connected with the first end of described switch, second end of described inductance coil is connected with the first end of described 3rd electric capacity, the tap of described inductance coil is connected with the first end of described first electric capacity, second end of described first electric capacity is connected with described antenna, the second end of described 3rd electric capacity simultaneously with the first end of described 5th electric capacity, the first end of described 3rd resistance is connected with the emitter of described first triode, the collector electrode of described first triode is connected with the second end of described second electric capacity, the base stage of described first triode is connected with the first end of described 4th electric capacity, the second end of described 5th electric capacity simultaneously with the second end of described 3rd resistance, the first end of described 6th electric capacity, the emitter of described second triode, the negative pole of described power supply is connected with the first end of described sound conducting apparatus, second end of described 6th electric capacity is connected with the second end of described first resistance, second end of described 4th electric capacity is connected with the second end of described second resistance and the collector electrode of described second triode simultaneously, the base stage of described second triode is connected with the first end of described 7th electric capacity and the second end of described 5th resistance simultaneously, second end of described 7th electric capacity is connected with the second end of described sound conducting apparatus and the second end of described 4th resistance simultaneously, and the positive pole of described power supply is connected with the second end of described switch.
The beneficial effects of the utility model are:
Wireless communication distance of the present utility model can reach 50 meters, and the slight sound of speech can picked up beyond three meters, microphone, there is highly sensitive, that stable work in work, antijamming capability are strong, applicability is strong and low in energy consumption feature, simultaneously, circuit structure of the present utility model is simple, components and parts used are few, reduce cost of manufacture, are conducive to promoting and using.
Accompanying drawing explanation
Fig. 1 is circuit structure schematic diagram of the present utility model.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail:
As shown in Figure 1: the utility model comprises the first electric capacity C1, second electric capacity C2, 3rd electric capacity C3, 4th electric capacity C4, 5th electric capacity C5, 6th electric capacity C6, 7th electric capacity C7, first resistance R1, second resistance R2, 3rd resistance R3, 4th resistance R4, 5th resistance R5, inductance coil L, first triode VT1, second triode VT2, sound conducting apparatus BM, power supply E, switch S and antenna TX, the first end of inductance coil L simultaneously with the first end of the second electric capacity C2, the first end of the first resistance R1, the first end of the second resistance R2, the first end of the 5th resistance R5, the first end of the 4th resistance R4 is connected with the first end of switch S, second end of inductance coil L is connected with the first end of the 3rd electric capacity C3, the tap of inductance coil L is connected with the first end of the first electric capacity C1, second end of the first electric capacity C1 is connected with antenna TX, second end of the 3rd electric capacity C3 simultaneously with the first end of the 5th electric capacity C5, the first end of the 3rd resistance R3 is connected with the emitter of the first triode VT1, the collector electrode of the first triode VT1 is connected with second end of the second electric capacity C2, the base stage of the first triode VT1 is connected with the first end of the 4th electric capacity C4, second end of the 5th electric capacity C5 simultaneously with second end of the 3rd resistance R3, the first end of the 6th electric capacity C6, the emitter of the second triode VT2, the negative pole of power supply E is connected with the first end of sound conducting apparatus BM, second end of the 6th electric capacity C6 is connected with second end of the first resistance R1, second end of the 4th electric capacity C4 is connected with second end of the second resistance R2 and the collector electrode of the second triode VT2 simultaneously, the base stage of the second triode VT2 is connected with the first end of the 7th electric capacity C7 and second end of the 5th resistance R5 simultaneously, second end of the 7th electric capacity C7 is connected with second end of sound conducting apparatus BM and second end of the 4th resistance R4 simultaneously, and the positive pole of power supply E is connected with the second end of switch S.
As shown in Figure 1: the extraneous sound wave produced changes audio voltage signal into by sound conducting apparatus BM, be coupled to after the second triode VT2 amplifies through the 7th electric capacity C7, the base stage of the first triode VT1 is added to through the 4th electric capacity C4, make the change in voltage of its PN junction, frequency of oscillation also changes thereupon, thus realizing frequency modulation(FM), the high-frequency signal after modulation is coupled to transmitting antenna TX through the first electric capacity C1, and to external radiation; Wherein inductance coil L and the second electric capacity C2 forms resonant tank, changes the number of turn and the spacing of inductance coil L, can change operating frequency.
Claims (1)
1. a wireless microphone circuit, is characterized in that: comprise the first electric capacity, second electric capacity, 3rd electric capacity, 4th electric capacity, 5th electric capacity, 6th electric capacity, 7th electric capacity, first resistance, second resistance, 3rd resistance, 4th resistance, 5th resistance, inductance coil, first triode, second triode, sound conducting apparatus, power supply, switch and antenna, the first end of described inductance coil simultaneously with the first end of described second electric capacity, the first end of described first resistance, the first end of described second resistance, the first end of described 5th resistance, the first end of described 4th resistance is connected with the first end of described switch, second end of described inductance coil is connected with the first end of described 3rd electric capacity, the tap of described inductance coil is connected with the first end of described first electric capacity, second end of described first electric capacity is connected with described antenna, the second end of described 3rd electric capacity simultaneously with the first end of described 5th electric capacity, the first end of described 3rd resistance is connected with the emitter of described first triode, the collector electrode of described first triode is connected with the second end of described second electric capacity, the base stage of described first triode is connected with the first end of described 4th electric capacity, the second end of described 5th electric capacity simultaneously with the second end of described 3rd resistance, the first end of described 6th electric capacity, the emitter of described second triode, the negative pole of described power supply is connected with the first end of described sound conducting apparatus, second end of described 6th electric capacity is connected with the second end of described first resistance, second end of described 4th electric capacity is connected with the second end of described second resistance and the collector electrode of described second triode simultaneously, the base stage of described second triode is connected with the first end of described 7th electric capacity and the second end of described 5th resistance simultaneously, second end of described 7th electric capacity is connected with the second end of described sound conducting apparatus and the second end of described 4th resistance simultaneously, and the positive pole of described power supply is connected with the second end of described switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420665372.1U CN204206431U (en) | 2014-11-10 | 2014-11-10 | A kind of wireless microphone circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420665372.1U CN204206431U (en) | 2014-11-10 | 2014-11-10 | A kind of wireless microphone circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204206431U true CN204206431U (en) | 2015-03-11 |
Family
ID=52664338
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420665372.1U Expired - Fee Related CN204206431U (en) | 2014-11-10 | 2014-11-10 | A kind of wireless microphone circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204206431U (en) |
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2014
- 2014-11-10 CN CN201420665372.1U patent/CN204206431U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20160606 Address after: 510000 Guangdong Province, Guangzhou Baiyun District and the town of West Industrial Zone with Fu Road No. 3 Patentee after: Guangzhou City Hua nobelium Electronic Technology Co. Ltd. Address before: High tech Zone Tianchen road Chengdu City, Sichuan province 610041 No. 88 Patentee before: Chengdu Zhongyuanxin Electronic Technology Co., Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150311 Termination date: 20171110 |