CN104618824A - Wireless microphone with changeable amplitude - Google Patents
Wireless microphone with changeable amplitude Download PDFInfo
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- CN104618824A CN104618824A CN201310545528.2A CN201310545528A CN104618824A CN 104618824 A CN104618824 A CN 104618824A CN 201310545528 A CN201310545528 A CN 201310545528A CN 104618824 A CN104618824 A CN 104618824A
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- resistance
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Abstract
The invention discloses a wireless microphone with changeable amplitude. The wireless microphone comprises a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor, a tenth resistor, a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, a fifth capacitor, a sixth capacitor, a seventh capacitor, an eighth capacitor, a ninth capacitor, a first audion, a second audion, a third audion, a fourth audion, a first inductor, a second inductor, a potentiometer, a microphone, a switch, a power supply and an antenna. The first end of the first capacitor is connected with the first end of the first resistor, the first end of the first inductor, the collector of the second audion, the first end of the seventh capacitor, the first end of the switch, the first end of the sixth resistor, the first end of the eighth resistor and the emitting electrode of the fourth audion. After the microphone receives the voice, the resistors and capacitors modulate the voice, the audions amplify the voice, the inductors reduce the noise of the voice, then the antenna transits the voice signal, and the voice signal is received by a receiver arranged at a loudspeaker, is processed and then is played by the loudspeaker. The wireless microphone has a simple structure, is easy to maintain, and has popularization value.
Description
Technical field
The present invention relates to a kind of wireless microphone, particularly relate to a kind of wireless microphone of width-adjustable.
Background technology
Multimedia teaching adopts multiple electronic medium as integrated use and classroom instructions such as magic lantern, projection, recording, video recordings, developing rapidly and popularizing along with computer technology, multimedia computer progressively instead of the comprehensive use status of Multiform Teaching Media in the past, but teacher remains the main body of teaching, popularizing simultaneously because of multimedia teaching, make a teacher can teach more student, but classroom is larger, the student of rear row may not hear the content of teachers, therefore needs to use the sound of loudspeaker to teacher and amplifies.
Summary of the invention
Object of the present invention is just the wireless microphone providing a kind of width-adjustable in order to solve the problem.
The present invention is achieved through the following technical solutions above-mentioned purpose:
A wireless microphone for width-adjustable, comprises the first resistance to the tenth resistance, first electric capacity is to the 9th electric capacity, first triode is to the 4th triode, first inductance, second inductance, potentiometer, microphone, switch, power supply and antenna, the first end of described first electric capacity respectively with the first end of described first resistance, the first end of described first inductance, the collector electrode of described second triode, the first end of described 7th electric capacity, the first end of described switch, the first end of described 6th resistance, the first end of described 8th resistance is connected with the emitter of described 4th triode, the second end of described 6th resistance respectively with the first end of described 9th electric capacity, the first end of described 7th resistance is connected with the base stage of described 3rd triode, and the second end of described 9th electric capacity is connected with the first end of described microphone, the second end of described microphone respectively with the second end of described 7th resistance, the first end of described 9th resistance, the first end of described 8th electric capacity is connected with the first end of described potentiometer and ground connection, second end of described 9th resistance is connected with the second end of described 8th electric capacity and the emitter of described 3rd triode respectively, the collector electrode of described 3rd triode is connected with the second end of described 8th resistance and the base stage of described 4th triode respectively, the described collector electrode of the 4th triode is connected with the second end of described potentiometer, the second end of described first resistance respectively with the first end of described second resistance, the first end of described second electric capacity is connected with the base stage of described first triode, the collector electrode of described first triode respectively with the second end of described first inductance, the first end of described 4th electric capacity is connected with the first end of described 3rd electric capacity, the emitter of described first triode respectively with the first end of described 3rd resistance, the first end of described 5th electric capacity is connected with the second end of described 4th electric capacity, second end of described 3rd electric capacity is connected with the first end of described tenth resistance and the base stage of described second triode respectively, second end of described tenth resistance is connected with the sliding end of described potentiometer, the emitter of described second triode is connected with the first end of described 4th resistance and the first end of described 6th electric capacity respectively, the second end of described 6th electric capacity respectively with the first end of described second inductance, the first end of described 5th resistance is connected with described antenna, and the second end of described switch is connected with the positive pole of described power supply, the second end of described first electric capacity respectively with the second end of described second resistance, second end of described second electric capacity, second end of described 3rd resistance, second end of described 5th electric capacity, second end of described 4th resistance, second end of described second inductance, second end of described 5th resistance, second end of described 7th electric capacity is connected with the negative pole of described power supply and ground connection.
Beneficial effect of the present invention is:
The present invention is by after acoustic reception, after the noise reduction of the modulation of Resistor-Capacitor Unit, the amplification of triode and inductance, by antenna, voice signal is launched again, loudspeaker end is provided with receiving system, play after audible signal reception process by loud speaker, structure of the present invention is simple, for ease of maintenaince, has the value promoted the use of.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of the wireless microphone of width-adjustable of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described:
As shown in Figure 1, the wireless microphone of width-adjustable of the present invention, comprises the first resistance R1 to the tenth resistance R10, first electric capacity C1 is to the 9th electric capacity C9, first triode T1 is to the 4th triode T4, first inductance L 1, second inductance L 2, potentiometer RP, microphone MIC, K switch, the first end of power supply U and antenna ANT, the first electric capacity C1 respectively with the first end of the first resistance R1, the first end of the first inductance L 1, the collector electrode of the second triode T2, the first end of the 7th electric capacity C7, the first end of K switch, the first end of the 6th resistance R6, the first end of the 8th resistance R8 is connected with the emitter of the 4th triode T4, second end of the 6th resistance R6 respectively with the first end of the 9th electric capacity C9, the first end of the 7th resistance R7 is connected with the base stage of the 3rd triode T3, and second end of the 9th electric capacity C9 is connected with the first end of microphone MIC, second end of microphone MIC respectively with second end of the 7th resistance R7, the first end of the 9th resistance R9, the first end of the 8th electric capacity C8 is connected with the first end of potentiometer RP and ground connection, second end of the 9th resistance R9 is connected with second end of the 8th electric capacity C8 and the emitter of the 3rd triode T3 respectively, the collector electrode of the 3rd triode T3 is connected with second end of the 8th resistance R8 and the base stage of the 4th triode T4 respectively, the collector electrode of the 4th triode T4 is connected with second end of potentiometer RP, second end of the first resistance R1 respectively with the first end of the second resistance R2, the first end of the second electric capacity C2 is connected with the base stage of the first triode T1, the collector electrode of the first triode T1 respectively with the second end of the first inductance L 1, the first end of the 4th electric capacity C4 is connected with the first end of the 3rd electric capacity C3, the emitter of the first triode T1 respectively with the first end of the 3rd resistance R3, the first end of the 5th electric capacity C5 is connected with second end of the 4th electric capacity C4, second end of the 3rd electric capacity C3 is connected with the first end of the tenth resistance R10 and the base stage of the second triode T2 respectively, second end of the tenth resistance R10 is connected with the sliding end of potentiometer RP, the emitter of the second triode T2 is connected with the first end of the 4th resistance R4 and the first end of the 6th electric capacity C6 respectively, second end of the 6th electric capacity C6 respectively with the first end of the second inductance L 2, the first end of the 5th resistance R5 is connected with antenna ANT, and the second end of K switch is connected with the positive pole of power supply U, second end of the first electric capacity C1 respectively with second end of the second resistance R2, second end of the second electric capacity C2, second end of the 3rd resistance R3, second end of the 5th electric capacity C5, second end of the 4th resistance R4, second end of the second inductance L 2, second end of the 5th resistance R5, second end of the 7th electric capacity C7 is connected with the negative pole of power supply U and ground connection.
The wireless microphone of width-adjustable of the present invention passes through microphone MIC by after acoustic reception, after the noise reduction of the modulation of Resistor-Capacitor Unit, the amplification of triode and inductance, by antenna ANT, voice signal is launched again, loudspeaker end is provided with receiving system, is sent after audible signal reception process by loud speaker.
Claims (1)
1. a wireless microphone for width-adjustable, is characterized in that: comprise the first resistance to the tenth resistance, first electric capacity is to the 9th electric capacity, first triode is to the 4th triode, first inductance, second inductance, potentiometer, microphone, switch, power supply and antenna, the first end of described first electric capacity respectively with the first end of described first resistance, the first end of described first inductance, the collector electrode of described second triode, the first end of described 7th electric capacity, the first end of described switch, the first end of described 6th resistance, the first end of described 8th resistance is connected with the emitter of described 4th triode, the second end of described 6th resistance respectively with the first end of described 9th electric capacity, the first end of described 7th resistance is connected with the base stage of described 3rd triode, and the second end of described 9th electric capacity is connected with the first end of described microphone, the second end of described microphone respectively with the second end of described 7th resistance, the first end of described 9th resistance, the first end of described 8th electric capacity is connected with the first end of described potentiometer and ground connection, second end of described 9th resistance is connected with the second end of described 8th electric capacity and the emitter of described 3rd triode respectively, the collector electrode of described 3rd triode is connected with the second end of described 8th resistance and the base stage of described 4th triode respectively, the described collector electrode of the 4th triode is connected with the second end of described potentiometer, the second end of described first resistance respectively with the first end of described second resistance, the first end of described second electric capacity is connected with the base stage of described first triode, the collector electrode of described first triode respectively with the second end of described first inductance, the first end of described 4th electric capacity is connected with the first end of described 3rd electric capacity, the emitter of described first triode respectively with the first end of described 3rd resistance, the first end of described 5th electric capacity is connected with the second end of described 4th electric capacity, second end of described 3rd electric capacity is connected with the first end of described tenth resistance and the base stage of described second triode respectively, second end of described tenth resistance is connected with the sliding end of described potentiometer, the emitter of described second triode is connected with the first end of described 4th resistance and the first end of described 6th electric capacity respectively, the second end of described 6th electric capacity respectively with the first end of described second inductance, the first end of described 5th resistance is connected with described antenna, and the second end of described switch is connected with the positive pole of described power supply, the second end of described first electric capacity respectively with the second end of described second resistance, second end of described second electric capacity, second end of described 3rd resistance, second end of described 5th electric capacity, second end of described 4th resistance, second end of described second inductance, second end of described 5th resistance, second end of described 7th electric capacity is connected with the negative pole of described power supply and ground connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310545528.2A CN104618824A (en) | 2013-11-05 | 2013-11-05 | Wireless microphone with changeable amplitude |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310545528.2A CN104618824A (en) | 2013-11-05 | 2013-11-05 | Wireless microphone with changeable amplitude |
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| Publication Number | Publication Date |
|---|---|
| CN104618824A true CN104618824A (en) | 2015-05-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310545528.2A Pending CN104618824A (en) | 2013-11-05 | 2013-11-05 | Wireless microphone with changeable amplitude |
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| Country | Link |
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| CN (1) | CN104618824A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109348368A (en) * | 2018-12-12 | 2019-02-15 | 黄高 | A kind of every class way system for protecting student's sense of hearing |
| CN111343562A (en) * | 2020-03-31 | 2020-06-26 | 郑州工程技术学院 | Music audio signal calibration system |
-
2013
- 2013-11-05 CN CN201310545528.2A patent/CN104618824A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109348368A (en) * | 2018-12-12 | 2019-02-15 | 黄高 | A kind of every class way system for protecting student's sense of hearing |
| CN111343562A (en) * | 2020-03-31 | 2020-06-26 | 郑州工程技术学院 | Music audio signal calibration system |
| CN111343562B (en) * | 2020-03-31 | 2021-09-10 | 郑州工程技术学院 | Music audio signal calibration system |
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| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150513 |