High-power infrared emission and reception
(wireless microphone)
Abstract
This design introduces the infrared microphone by the infrared light took the sound signal the carrier, carries on the sound signal the modulation and the demodulation process.Including acoustic pickup, signal modulation and enlargement electric circuit, signal projector, signal receiver, signal return to original state and enlargement electric circuit. The infrared photo tube transforms the electrical signal into the light signal and to the spatial transmission, the light-seeking homing receives this light signal and transforms into the electrical signal transmits again for the signal return to original state and the enlargement electric circuit.The infrared microphone frequency above 3G, the frequency environment is clean, very little has the equipment to radiate the disturbing wave.Uses is reserved a room quantity limit, the versatility is good, keeping secret and so on ,which are incomparable with the radio frequency microphone.
Key word: Modulation demodulation；Infrared communication；Launches；LM567
