Title :
1-V power supply CMOS cascode amplifier
Author :
Lehmann, Torsten ; Cassia, Marco
Author_Institution :
Cochlear Ltd., Lane Cove, NSW, Australia
fDate :
7/1/2001 12:00:00 AM
Abstract :
We design a folded cascode operational transconductance amplifier in a standard CMOS process, which has a measured 69-dB DC gain, a 2-MHz bandwidth, and compatible input- and output voltage levels at a 1-V power supply. This is done by a novel, current driven bulk (CDB) technique, which reduces the MOST threshold voltage by forcing a constant current though the transistor bulk terminal. We also look at limitations and improvements of this CDB technique
Keywords :
CMOS analogue integrated circuits; current mirrors; low-power electronics; operational amplifiers; 1 V; 2 MHz; 69 dB; CMOS cascode amplifier; DC gain; bulk bias; compatible I/O voltage levels; constant current; current driven bulk technique; current mirror; differential pair; folded cascode OTA; reduced MOST threshold voltage; standard CMOS process; Bandwidth; CMOS process; Gain measurement; Measurement standards; Operational amplifiers; Power amplifiers; Power measurement; Power supplies; Transconductance; Voltage;
Journal_Title :
Solid-State Circuits, IEEE Journal of
