MATEC Web of Conferences (Jan 2017)
Decrease uncertainty of measuring small differential signal against large common-mode signal
Abstract
Comparators capable of comparing two alternating signals of the similar frequency within a wide dynamic range of frequencies and voltages are lock-in amplifiers with a differential input. The paper presents the methods and means are suggested for reducing the measurements uncertainty conditioned by the finite value of the common-mode rejection ratio in lock-in amplifier with a differential input.