A preprocessing circuit is designed for analog signal transformation because of large inner impedance of biosensor and bipolar signal.
针对采用的生物传感器内阻高、信号弱、双极性等特点，用预处理电路对模拟信号进行了变换。
2
Simulation confessed: the method has high location precision and fast decomposition rapid, which can be applied to diagnose large-scale analogcircuit fault.
仿真试验表明该方法故障定位精确度高、撕裂迅速，有利于大规模模拟电路故障诊断过程自动化的实现。
3
Abstract: 555 timer which sets the analog, digital in one of the large scale integrated circuit has been widely used.