CN204206407U - A kind of high tone quality frequency modulation wireless microphone - Google Patents
A kind of high tone quality frequency modulation wireless microphone Download PDFInfo
- Publication number
- CN204206407U CN204206407U CN201420638262.6U CN201420638262U CN204206407U CN 204206407 U CN204206407 U CN 204206407U CN 201420638262 U CN201420638262 U CN 201420638262U CN 204206407 U CN204206407 U CN 204206407U
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- electric capacity
- resistance
- triode
- power supply
- wireless microphone
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Abstract
The utility model discloses a kind of high tone quality frequency modulation wireless microphone, comprise power supply, push-button switch, antenna, the first electric capacity to the 6th electric capacity, the first resistance to the 5th resistance, inductance, triode and Electret condenser microphone, the modulates audio signals circuit that audio signal forms through triode, the 3rd electric capacity, inductance, electric capacity, the 4th electric capacity, the second resistance, the 5th electric capacity and the 5th resistance is modulated, and the signal after modulation is gone out by antenna transmission.In the utility model, the 5th electric capacity and the 5th resistance composition can suppress the circuit of humorous wave interference in power supply, improve the antijamming capability of this wireless microphone to harmonic wave in power supply, second resistance and the 4th electric capacity can improve the tonequality of audio frequency, the capacitive reactance of the 4th electric capacity is increased with audio frequency and is reduced, therefore carry out attenuates high frequency signals with the 4th electric capacity, relative just improves low frequency signal, and the second resistance is used for suppressing the degree of attenuate high frequency signal volume, improves the acoustical quality of this wireless microphone.
Description
Technical field
The utility model relates to a kind of frequency modulation wireless microphone, particularly relates to a kind of high tone quality frequency modulation wireless microphone.
Background technology
Am radio microphone utilizes microphone that voice signal is become audio electrical signal, the amplitude of modulating high-frequency oscillation signal after amplifying is launched in the form of an electromagnetic wave through antenna again, am radio microphone adopts shortwave to send, frequency modulation wireless microphone by preamplifier, the higher-order of oscillation and amplifier three part form, frequency modulation wireless microphone is widely used in all kinds of amusement equipment, tradition frequency modulation wireless microphone is subject to humorous wave interference in power supply, and also there is the problem of acoustical quality difference.
Utility model content
The purpose of this utility model is just to provide a kind of high tone quality frequency modulation wireless microphone to solve the problem.
In order to achieve the above object, the utility model have employed following technical scheme:
A kind of high tone quality frequency modulation wireless microphone, comprises power supply, push-button switch, antenna, first electric capacity, second electric capacity, 3rd electric capacity, 4th electric capacity, 5th electric capacity, 6th electric capacity, first resistance, second resistance, 3rd resistance, 4th resistance, 5th resistance, inductance, triode and Electret condenser microphone, the positive pole of described power supply is connected with the first end of described push-button switch, the negative pole of described power supply respectively with the first end of described first resistance, the first end of described 3rd electric capacity, the emitter of described triode, the first end of described second resistance, the first end of described 3rd resistance is connected with the first end of described 4th resistance, the second end of described push-button switch respectively with the first end of described first electric capacity, the first end of described inductance, the first end of described 6th electric capacity, the first end of described 5th electric capacity, the first end of described 5th resistance is connected with the second end of described 4th resistance, and the second end of described first electric capacity is connected with the second end of described first resistance, the second end of described inductance respectively with the first end of described second electric capacity, the first end of described 6th electric capacity, second end of described 3rd electric capacity is connected with the collector electrode of described triode, and the second end of described second electric capacity is connected with the signal transmitting terminal of described antenna, the base stage of described triode respectively with the first end of described 4th electric capacity, the first end of described Electret condenser microphone, second end of described 5th electric capacity is connected with the second end of described 5th resistance, and the second end of described 4th electric capacity is connected with the second end of described second resistance, and the second end of described Electret condenser microphone is connected with the second end of described 3rd resistance.
In said structure, 5th electric capacity and the 5th resistance composition can suppress the circuit of humorous wave interference in power supply, improve the antijamming capability of this wireless microphone to harmonic wave in power supply, second resistance and the 4th electric capacity can improve the tonequality of audio frequency, the capacitive reactance of the 4th electric capacity with audio frequency increase and reduce, therefore carry out attenuates high frequency signals with the 4th electric capacity, relative just improves low frequency signal, second resistance is used for suppressing the degree of attenuate high frequency signal volume, improves the acoustical quality of this wireless microphone.
The beneficial effects of the utility model are:
The utility model is a kind of high tone quality frequency modulation wireless microphone, in this wireless microphone, the 5th electric capacity and the 5th resistance composition can suppress the circuit of humorous wave interference in power supply, improve the antijamming capability of this wireless microphone to harmonic wave in power supply, second resistance and the 4th electric capacity can improve the tonequality of audio frequency, the capacitive reactance of the 4th electric capacity with audio frequency increase and reduce, therefore carry out attenuates high frequency signals with the 4th electric capacity, relative just improves low frequency signal, second resistance is used for suppressing the degree of attenuate high frequency signal volume, improves the acoustical quality of this wireless microphone.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of a kind of high tone quality frequency modulation wireless microphone of the utility model.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail:
As shown in Figure 1, a kind of high tone quality frequency modulation wireless microphone of the utility model, comprises power supply E, push-button switch S, antenna Y, first electric capacity C1, second electric capacity C2, 3rd electric capacity C3, 4th electric capacity C4, 5th electric capacity C5, 6th electric capacity C6, first resistance R1, second resistance R2, 3rd resistance R3, 4th resistance R4, 5th resistance R5, inductance L, the positive pole of triode VT and Electret condenser microphone MIC, power supply E is connected with the first end of push-button switch S, the negative pole of power supply E respectively with the first end of the first resistance R1, the first end of the 3rd electric capacity C3, the emitter of triode VT, the first end of the second resistance R2, the first end of the 3rd resistance R3 is connected with the first end of the 4th resistance R4, second end of push-button switch S respectively with the first end of the first electric capacity C1, the first end of inductance L, the first end of the 6th electric capacity C6, the first end of the 5th electric capacity C5, the first end of the 5th resistance R5 is connected with second end of the 4th resistance R4, and second end of the first electric capacity C1 is connected with second end of the first resistance R1, the second end of inductance L respectively with the first end of the second electric capacity C2, the first end of the 6th electric capacity C6, second end of the 3rd electric capacity C3 is connected with the collector electrode of triode VT, and second end of the second electric capacity C2 is connected with the signal transmitting terminal of antenna Y, the base stage of triode VT respectively with the first end of the 4th electric capacity C4, the first end of Electret condenser microphone MIC, second end of the 5th electric capacity C5 is connected with second end of the 5th resistance R5, and second end of the 4th electric capacity C4 is connected with second end of the second resistance R2, and second end of Electret condenser microphone MIC is connected with second end of the 3rd resistance R3.
Operation principle of the present utility model is as follows:
Triode VT is higher-order of oscillation pipe, 3rd electric capacity C3 is positive feedback capacitor, it makes triode VT starting of oscillation work, and produce continuous oscillation, the frequency of oscillation of triode VT is primarily of inductance L, 3rd electric capacity C3, the junction capacitance of the 6th electric capacity C6 and triode VT determines, when sounding facing to Electret condenser microphone MIC, voice signal is become the base stage that audio signal delivers to triode VT by Electret condenser microphone MIC, the emitter junction electric capacity of triode VT is changed with the change of audio signal, through triode VT, 3rd electric capacity C3, inductance L, electric capacity C6, 4th electric capacity C4, second resistance R2, the modulates audio signals circuit that 5th electric capacity C5 and the 5th resistance R5 forms is modulated, signal after modulation is launched by antenna Y, 5th electric capacity C5 and the 5th resistance R5 composition can suppress the circuit of humorous wave interference in power supply, 5th resistance R5 is also as the biasing resistor of triode VT, second resistance R2 and the 4th electric capacity C4 can improve the tonequality of audio frequency, the capacitive reactance of the 4th electric capacity C4 with audio frequency increase and reduce, therefore carry out attenuates high frequency signals with the 4th electric capacity C4, relative just improves low frequency signal, second resistance R2 is used for suppressing the degree of attenuate high frequency signal volume, the acoustical quality of circuit can be improved.
Claims (1)
1. a high tone quality frequency modulation wireless microphone, is characterized in that: comprise power supply, push-button switch, antenna, first electric capacity, second electric capacity, 3rd electric capacity, 4th electric capacity, 5th electric capacity, 6th electric capacity, first resistance, second resistance, 3rd resistance, 4th resistance, 5th resistance, inductance, triode and Electret condenser microphone, the positive pole of described power supply is connected with the first end of described push-button switch, the negative pole of described power supply respectively with the first end of described first resistance, the first end of described 3rd electric capacity, the emitter of described triode, the first end of described second resistance, the first end of described 3rd resistance is connected with the first end of described 4th resistance, the second end of described push-button switch respectively with the first end of described first electric capacity, the first end of described inductance, the first end of described 6th electric capacity, the first end of described 5th electric capacity, the first end of described 5th resistance is connected with the second end of described 4th resistance, and the second end of described first electric capacity is connected with the second end of described first resistance, the second end of described inductance respectively with the first end of described second electric capacity, the first end of described 6th electric capacity, second end of described 3rd electric capacity is connected with the collector electrode of described triode, and the second end of described second electric capacity is connected with the signal transmitting terminal of described antenna, the base stage of described triode respectively with the first end of described 4th electric capacity, the first end of described Electret condenser microphone, second end of described 5th electric capacity is connected with the second end of described 5th resistance, and the second end of described 4th electric capacity is connected with the second end of described second resistance, and the second end of described Electret condenser microphone is connected with the second end of described 3rd resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420638262.6U CN204206407U (en) | 2014-10-30 | 2014-10-30 | A kind of high tone quality frequency modulation wireless microphone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420638262.6U CN204206407U (en) | 2014-10-30 | 2014-10-30 | A kind of high tone quality frequency modulation wireless microphone |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204206407U true CN204206407U (en) | 2015-03-11 |
Family
ID=52664314
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420638262.6U Expired - Fee Related CN204206407U (en) | 2014-10-30 | 2014-10-30 | A kind of high tone quality frequency modulation wireless microphone |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204206407U (en) |
-
2014
- 2014-10-30 CN CN201420638262.6U patent/CN204206407U/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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150311 Termination date: 20151030 |
|
| EXPY | Termination of patent right or utility model |