摘要
本文介绍了热释电探测器前置放大器的噪声、阻抗匹配和带宽问题 ,指出在保证前置放大器具有较高灵敏度的情况下 。
This paper studies the problems of the pre amplifier noise,impedance matching and the width of frequency band in the pyroelectric detector,and suggests feasible measures to make output noise level reach the minimal range limited by this system under the circumstance that ensures a higher sensity of a pre amplifier.
