Title :
Fast response lock-in amplifier
Author :
Banuelos-Saucedo, Miguel A. ; Ozanyan, Krikor B.
Author_Institution :
Sensing Imaging & Signal Process. Group, Univ. of Manchester, Manchester, UK
Abstract :
Lock-in amplifiers are used to recover information from a noisy signal. There is a trade-off between the noise reduction obtained and the speed of response. We present the use of a cumulative average as a low-pass filter element in a lock-in amplifier. This configuration produces faster time responses than standard approaches, but without sacrificing noise reduction. Results are supported by numerical simulations using Simulink.
Keywords :
amplifiers; low-pass filters; numerical analysis; signal processing equipment; Simulink; fast response lock-in amplifier; low-pass filter element; noise reduction; noisy signal; numerical simulations; Amplifiers; Finite impulse response filter; IIR filters; Low pass filters; Noise; Noise reduction; Lock-in amplifier; cumulative averaging; equivalent noise bandwidth; linear averaging;
Conference_Titel :
Instrumentation and Control Technology (ISICT), 2012 8th IEEE International Symposium on
Conference_Location :
London
Print_ISBN :
978-1-4673-2615-5
DOI :
10.1109/ISICT.2012.6291623
