全国产化微弱信号调理电路OA北大核心CSTPCD

A novel multi-channel signal front-end conditioning module is proposed to better process the weak signal.This module not only has programmable gain function,but also can integrate band-pass filter.A design scheme of comprehensive and innovative conditioning module is proposed while ensuring key performances such as high input impedance and low noise.The core of this scheme is the use of programmable gain amplifiers,which can significantly enhance the module's adaptability in amplifying various weak signals.Furthermore,the HC595 series chips are used to precise control the gain.This circuit has a fixed gain of 26 dB and an adjustable gain range of 0 to 84 dB,with the operating bandwidth set between 380 kHz and 420 kHz.After system performance testing,the results show that this conditioning circuit can successfully meet all requirements set out in the design objectives.