Amplitude modulation wireless microphone for computer

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...

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

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