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.
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