Title :
Improved operational amplifier settling behaviour using active compensation techniques
Author :
Makris, C.A. ; Toumazou, C.
Author_Institution :
Dept. of Electr. Eng., Imperial Coll. of Sci., Technol. & Med., London, UK
Abstract :
An active compensation technique for two-stage CMOS operational amplifiers is described. The settling response of a two-stage operational amplifier is critically dependent upon an effective capacitance. The introduction of a current follower to the commonly employed voltage follower and capacitor compensation network significantly reduces this capacitance, resulting in a considerable reduction in operational amplifier setting time. Simulated performances using ideal followers indicate ultimate dynamic performance improvements
Keywords :
CMOS integrated circuits; compensation; linear integrated circuits; nonlinear network synthesis; operational amplifiers; active compensation technique; capacitor compensation network; current follower; dynamic performance; effective capacitance; settling response; two-stage CMOS operational amplifiers; voltage follower; CMOS technology; Capacitors; Educational institutions; Equivalent circuits; Operational amplifiers; Parasitic capacitance; Poles and zeros; Radio frequency; Transconductance; Voltage;
Conference_Titel :
Circuits and Systems, 1990., IEEE International Symposium on
Conference_Location :
New Orleans, LA
DOI :
10.1109/ISCAS.1990.112138
