Title :
Noise-cancelling switched-capacitor (SC) filtering technique
Author :
Lam, K.K.K. ; Copeland, M.A.
Author_Institution :
Carleton University, Department of Electronics, Ottawa, Canada
Abstract :
A method of reducing the 1/f noise in SC filters is shown using an initialising technique. This technique also removes the input offset of the operational amplifier, and thus gives an offset-free SC building block. Experimental results for a first-order lowpass filter illustrating the above are presented.
Keywords :
active filters; interference suppression; low-pass filters; random noise; switched capacitor networks; switched filters; 1/f noise; active filters; first-order low-pass filter; initialising technique; input offset removal; interference suppression; operational amplifier; random noise; switched capacitor filters;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19830553
