Title :
Analysis of low-frequency noise reduction by autozero technique
Author_Institution :
Swiss Federal Institute of Technology, Electronics Laboratory, Lausanne, Switzerland
Abstract :
This letter analyses the low-frequency noise reduction produced by the autozero technique. A very simple model is established, and the output average power spectrum in the case of lowpass filtered white noise and 1/f noise is calculated. This analysis clearly shows the limitation to low-frequency noise reduction introduced by the foldover effect.
Keywords :
CMOS integrated circuits; low-pass filters; operational amplifiers; random noise; white noise; 1/f noises; CMO operational amplifier; autozero technique; foldover effect; low-frequency noise reduction; lowpass filtered white noise; output average power spectrum;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19840652
