We use the principle of lock - in amplifier to amplify the weak singal and send it toA/ Dconversion properly.
为将接收二极管上的微弱信号送到A/D转换器处理,采用锁定放大原理设计接收信号的调理电路。
3
The double integration A/D converter and the electro-optical isolation device are used to reduce the mains noise and motor interference, which can significantly improve the accuracy of A/Dconversion.