Title :
Modified modeling of Miller compensation for two-stage operational amplifiers
Author :
Yang, Howard C. ; Allstot, David J.
Author_Institution :
Chips & Technol. Inc., San Jose, CA, USA
Abstract :
The mechanism of Miller compensation for two-stage operational amplifiers is modified. The analysis shows that both dominant and nondominant poles are with the first stage of the opamp after compensation; the second stage pole is canceled by a Miller zero. That is, the poles do not split during the frequency compensation, as previously thought. This improved understanding results in a new conceptual compensation circuit, which improves the performance of the two-stage op amps
Keywords :
compensation; network analysis; operational amplifiers; poles and zeros; Miller compensation; Miller zero; compensation circuit; dominant poles; frequency compensation; nondominant poles; two-stage operational amplifiers; Capacitors; Circuits; Frequency; Operational amplifiers; Poles and zeros; Predictive models; Resistors; Semiconductor device modeling; Transconductance; Transfer functions;
Conference_Titel :
Circuits and Systems, 1991., IEEE International Sympoisum on
Print_ISBN :
0-7803-0050-5
DOI :
10.1109/ISCAS.1991.176049
