Title :
Three stage amplifier with positive feedback compensation scheme
Author :
Ramos, João ; Steyaert, Michiel
Author_Institution :
ESAT-MICAS, Katholieke Univ., Leuven, Belgium
Abstract :
A CMOS opamp that can drive large capacitive loads is presented. The technique employs a positive feedback compensation (PFC) to improve frequency response as compared to nested Miller compensation (NMC), allowing the circuit to occupy less silicon area and straightforward design. At 1.5 V, the circuit dissipates 275 μW, has more than 100 dB gain, a gain bandwidth of 2.7 MHz and 1.0 V/μs average slew rate while driving a 130 pF load.
Keywords :
CMOS analogue integrated circuits; compensation; feedback amplifiers; frequency response; low-power electronics; operational amplifiers; 1.5 V; 100 dB; 130 pF; 2.7 MHz; 275 muW; CMOS opamp; frequency response improvement; large capacitive loads; positive feedback compensation; three stage amplifier; Bandwidth; Capacitors; Circuits; Feedback; Frequency; Gain; Low voltage; Operational amplifiers; Silicon; Thermal force;
Conference_Titel :
Custom Integrated Circuits Conference, 2002. Proceedings of the IEEE 2002
Print_ISBN :
0-7803-7250-6
DOI :
10.1109/CICC.2002.1012833
