集成运放参数测量总程序，可以对失调电压，失调电流，抑制比，增益四个参数进行测量，有按键切换功能，实时液晶显示

数字信号处理在自适应滤波中的应用 ——正弦干扰的抑制 -Digital signal processing in the adaptive filtering application- sinusoidal interference suppression

在要求通信距离为几十米到上千米时，广泛采用RS-485串行总线标准。RS-485采用平衡发送和差分接收，因此具有抑制共模干扰的能力。-Requiring communication distance of tens of meters to 1000 meters, it is widely used RS-485 serial bus standard. RS-485 balanced differential transmit and receive, so it has the abili