Title :
Operational amplifier input stage robust to EMI
Author_Institution :
Dipartimento di Elettronica, Politecnico di Torino, Italy
fDate :
7/19/2001 12:00:00 AM
Abstract :
Radio frequency interference superimposed on the input nominal signals of an operational amplifier excites distortion phenomena in active nonlinear devices. In actual differential input stages, interference generates even-order harmonics and in particular DC offset voltage. A new frequency selective input differential stage is presented, which minimises the generation of DC offset voltage due to distortion phenomena
Keywords :
BiCMOS analogue integrated circuits; harmonic distortion; operational amplifiers; radiofrequency interference; BiCMOS process; DC offset voltage; EMI robustness; RF interference; active nonlinear devices; distortion phenomena; even-order harmonics; folded cascode; frequency selective input differential stage; mixer effect; operational amplifier input stage; parasitic elements;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:20010651
