P4.4 - Investigations on Noise Level in AC- and DC-Bridge Circuits for Sensor Measurement Systems
M. Asif Khan, Gerrit Dumstorff, Charles Winkelmann, W. Lang · Tagungsband · 2016
Reducing noise in measurement is an important challenge in resistive sensing.This paper presents a system based on AC-excitation and lock-in amplification.In order to evaluate the circuit ability to perform precise measurement, noise level in AC-and DC-excitation is measured.Experimental results show a promising read-out system that is capable of high noise level reduction in noisy environments.Using AC bridge excitation and lock-in amplification, the noise level is reduced by 1:55 compared with DC-excitation.