关键词：红外通信；发射；光电转换；接收
DENG Bo-wen
Abstract
Infrared communication is a way of communication based on infrared data transmission, the characteristics of infrared communication are simple to control, easy to implement, transfer, high reliability, close, wireless, and cheap, low power consumption, strong confidentiality. But its wavelength is short, the diffraction capability is not strong, so it is just only suitable for short distance, and go on "point to point" data transmission, so this way of communication is widely used in small mobile device.
This project used the analog circuit knowledge and devided the whole system into the infrared emission module and the infrared receiving module. The infrared emission module was made of infrared emission circuit and audio signal input circuit, the infrared receiving module was made of infrared signal receiving circuit and amplification circuit.. Test results show that In the whole system’s input signal is the audio, after through the sending circuit debugging, then the audio receiving by the infrared receiving tube of receiving module and through LM - 386 chips for signal amplification and filter high-pass filter, finally can we hear the voice which input in infrared emission module, and all kinds of performance index can meet the requirements of this design.
