在电子测量技术及微波小信号检测中,往往需要用到毫微伏指零器。它的基本原理是应用相关同步检测技术,在干扰及噪声电平大于信号电平的情况下,把被测的微弱信号检测出来。该仪器可应用于半导体载流子寿命检测,微波小衰减以及大量程衰减的检测等。上海市测试技术研究所试制的全晶体小型毫微伏指零器的主要技术指标如下: In electronic measurement technology and microwave small signal detection, often need to use nano-micro-finger zero device. Its basic principle is the application of synchronous detection technology, the interference and noise levels greater than the signal level, the measured weak signal detected. The instrument can be applied to semiconductor carrier lifetime testing, microwave small attenuation and large-scale attenuation detection. Shanghai Institute of Test Technology trial of all-crystal small nano-zero finger zero the main technical indicators are as follows: