a wireless microphone

Abstract

The invention discloses a wireless microphone, which comprises an audio transmitter and an audio receiver, wherein a first signal processing circuit of the audio transmitter consists of a CC8520 first radio frequency chip and a first peripheral circuit, a second signal processing circuit of the audio receiver consists of a CC8520 second radio frequency chip and a second peripheral circuit, the first signal processing circuit is used for receiving a digital audio signal outputted by the analog to digital converter, converting the digital audio signal into a radio frequency signal, and inputting the radio frequency signal into a power amplifier, the power amplifier is used for performing power amplification on the radio frequency signal, and transmitting the radio frequency signal via a wireless transmission antenna, a wireless receiving antenna is used for receiving the radio frequency signal, a low-noise amplifier is used for amplifying the radio frequency signal, and then inputting the radio frequency signal into the second signal processing circuit, the second signal processing circuit is used for converting the radio frequency signal into the digital audio signal, and the analog to digital converter is used for converting the digital audio signal into an analog signal, and then outputting the analog signal. The wireless microphone has the advantages that the cost is lower, and the size is smaller.

Description

Technical field [0001] The invention relates to a microphone, in particular to a wireless microphone. Background technique [0002] The audio transmitter includes a capsule for picking up external sounds, an audio amplifier, an audio compressor, an audio modulator and a radio frequency power amplifier, a wireless transmitting antenna and a first power management module. The capsule is connected to the audio amplifier, and the audio amplifier is connected to the audio The compander circuit is connected, the audio compander circuit is connected to the power amplifier, and the power amplifier is connected to the wireless transmitting antenna, and the first power management module is used to provide the working voltage required by the audio receiver. The audio receiver includes wireless receiving antenna, low noise amplifier, audio demodulator, audio compressor, audio amplifier, second power management module, wireless receiving antenna and low noise amplifier connected, low noise am...

AI Technical Summary

Problems solved by technology

[0004] However, the above-mentioned wireless microphones have the following problems: low-noise amplifier, audio demodulator, audio compander, and audio amplifier are used as the core circuit of the audio receiver, and the audio amplifier, audio compander, audio modulator, and radio frequency power amplifier are used as audio transmitters. The core circuit of the device, and these two parts of the core computer are realized by pure hardware discrete components, there are many components and the circuit volume is large, resulting in high overall cost, and the volume of the audio receiver and audio transmitter is relatively large. Big

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