现代电子技术2024，Vol.47Issue(20)：27-32,6.DOI:10.16652/j.issn.1004-373x.2024.20.005
全国产化微弱信号调理电路
Totally-domestic weak signal conditioning circuit
摘要
Abstract
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.关键词
微弱信号处理/调理电路/程控增益/带通滤波器/放大电路/运算放大器Key words
weak signal processing/conditioning circuit/programmable gain/band-pass filter/amplification circuit/operational amplifier分类
电子信息工程引用本文复制引用
赵星灵,张丹,汪桂,刘海龙..全国产化微弱信号调理电路[J].现代电子技术,2024,47(20):27-32,6.基金项目
武汉市科学技术局知识创新专项(2023010201020423) （2023010201020423）
