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Design and Study of Weak Signal Conditioning Circuit
Pages: 64-67,84
Year: Issue:  1
Journal: Journal of Southwest University of Science and Technology

Keyword:  微弱信号自动跟踪滤波器可编程增益动态范围;
Abstract: 精确的信号调理技术是测控领域发展的重要方向.基于开关电容滤波器和程控放大器设计了一种新的信号调理电路,采用ATmega 128单片机自适应地调整开关电容的滤波参数和程控放大器的放大倍数.微音器微弱信号检测的实验结果表明,该电路能达到动态范围几微伏到几十毫伏、灵敏度1μV、响应时间优于1 ms的技术指标,具有性能稳定,可靠性高、灵活性强、可编程等特点.
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