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Amplitude modulation wireless microphone for computer

A wireless microphone and computer technology, applied in the direction of transducer circuits, sensors, electrical components, etc., can solve the problems of easy over-amplification, poor anti-interference ability, high energy consumption, etc., to improve anti-interference, prevent over-amplitude modulation, The effect of low energy consumption

Inactive Publication Date: 2014-04-02
天津康惠美科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Wireless microphones are widely used in contemporary stage performances, hosting speeches, home entertainment, conference broadcasting and teaching. Compared with wired microphones, they have the advantages of convenient use and elegant appearance. They do not need long cables during use and get rid of wired microphones. In terms of teaching and conference broadcasting, it is necessary to combine wireless microphones and computers, so as to achieve better teaching and conference effects. AM wireless microphones can make audio signals on the carrier signal of AM wireless microphones. Amplitude modulated wireless microphones, traditional AM wireless microphones have poor anti-interference ability, high energy consumption and prone to over-amplitude modulation

Method used

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  • Amplitude modulation wireless microphone for computer

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Embodiment Construction

[0009] The present invention will be further described below in conjunction with accompanying drawing:

[0010] Such as figure 1 As shown, the present invention is an AM wireless microphone for computers, including a power supply E, a switch S, a first resistor R1 to a twelfth resistor R12, a first capacitor C1 to a ninth capacitor C9, an antenna Y, and a first inductor L1 , the second inductance L2, the first transistor VT1 to the fourth transistor VT4, the potentiometer RP and the electret microphone MIC, the positive pole of the power supply E is connected to the first end of the switch S, and the negative pole of the power supply E is respectively connected to the first terminal of the switch S The first terminal of the first resistor R1, the first terminal of the second resistor R2, the first terminal of the first inductor L1, the first terminal of the third resistor R3, the first terminal of the fifth capacitor C5, the first terminal of the fourth resistor R4 One end, t...

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Abstract

The invention discloses an amplitude modulation wireless microphone for a computer. The amplitude modulation wireless microphone comprises a power supply, a switch, a first resistor to a twelfth resistor, a first capacitor to a ninth capacitor, an antenna, a first inductor, a second inductor, a first triode to a fourth triode, a potentiometer and an electret microphone, wherein the second triode, the second inductor, the third inductor, the fourth capacitor, the fifth capacitor, the sixth capacitor, the fourth resistor, the fifth resistor and the seventh resistor form a common-base capacitance three-point oscillator, an oscillation signal transmitted by the common-base capacitance three-point oscillator is used as a carrier signal, an audio signal is used as a modulation signal, and finally an amplitude modulation signal is connected with the antenna through a matching network consisting of the second capacitor, the first inductor and the second resistor and transmitted to the space through the antenna. A be node of the first triode has a nonlinear character, so that the amplitude modulation of the audio signal for the carrier signal can be realized, the interference resistance of the wireless microphone can be improved, the potentiometer is used for adjusting the modulation signal, and the excessive amplitude modulation can be prevented.

Description

technical field [0001] The invention relates to an amplitude modulation wireless microphone, in particular to an amplitude modulation wireless microphone used for computers. Background technique [0002] Wireless microphones are widely used in contemporary stage performances, hosting speeches, home entertainment, conference broadcasting and teaching. Compared with wired microphones, they have the advantages of convenient use and elegant appearance. They do not need long cables during use and get rid of wired microphones. In terms of teaching and conference broadcasting, it is necessary to combine wireless microphones and computers, so as to achieve better teaching and conference effects. AM wireless microphones can make audio signals on the carrier signal of AM wireless microphones. For wireless microphones with amplitude modulation, traditional AM wireless microphones have poor anti-interference ability, high energy consumption and prone to over AM. Contents of the inv...

Claims

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Application Information

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IPC IPC(8): H04R3/00
Inventor 张凌志
Owner 天津康惠美科技有限公司
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