摘要
热释电探测器的输出信号十分微弱,使得其响应率很低,为了提高响应率就一定要和前置放大器连用,因此前置放大器的噪声对响应率的影响很大。本文从热释电探测器对前置放大器的要求入手,从噪声匹配的方法、无源器件的选取以及放大器的屏蔽与接地三个角度提出如何降低前置放大器的噪声以提高响应率。
Pyroelectric detector＇s output signal is very weak,so the response rate is low,the pre-amplifier must be used in conjuction in order to improve the response rate,so pre-amplifier＇noise impact on response rates great.The paper starts from requirements of the pyroelectric detector to the preamplifier and proposes a method that how to reduce the noise of pre-amplifier to improve the response rate from the noise matching method,the selection of passive components and shielding and grounding of the pre-amplifier.
出处
《长春理工大学学报（自然科学版）》
2011年第2期51-53,66,共4页
Journal of Changchun University of Science and Technology(Natural Science Edition)
关键词
热释电探测器
前置放大器
响应率
pyroelectric detector
pre-amplifier
response rate
