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设计了一种带光电隔离的模/数转换电路，整个电路在PIC单片机控制下运行，用FIFO存储器作为数据缓存器，容易配合在Windows下的可视化编程，实现实时采样与波形显示电路的电气安全性能好，适合于生理信号的采集
A kind of A / D conversion circuit with optoelectronic isolation is designed. The whole circuit runs under the control of PIC microcontroller and FIFO memory is used as data buffer. It is easy to cooperate with visual programming under Windows to realize real-time sampling and waveform display. Good safety performance, suitable for physiological signal acquisition