Title :
Folded-cascode CMOS operational amplifier with slew rate enhancement circuit
Author :
Sakurai, Satoshi ; Zarabadi, Seyed R. ; Ismail, Mohammed
Author_Institution :
Dept. of Electr. Eng., Ohio State Univ., Columbus, OH, USA
Abstract :
A slew-rate enhancement circuit for improving the nonsymmetric slew rate of the output stages is introduced. A signal-dependent dynamic biasing circuit is incorporated to only activate the slew rate enhancement circuit in large signal transients. This circuit is incorporated in the output stage of a folded-cascode opamp design fabricated in a 2 micron CMOS technology. Experimental results demonstrate the desired operation of the proposed circuit
Keywords :
CMOS integrated circuits; linear integrated circuits; operational amplifiers; 2 micron; CMOS operational amplifier; folded-cascode opamp design; large signal transients; monolithic IC; output stages; signal-dependent dynamic biasing circuit; slew rate enhancement circuit; CMOS technology; Circuit simulation; Degradation; Delay; High speed integrated circuits; Impedance; Operational amplifiers; Performance analysis; Predictive models; Signal processing;
Conference_Titel :
Circuits and Systems, 1990., IEEE International Symposium on
Conference_Location :
New Orleans, LA
DOI :
10.1109/ISCAS.1990.112694
