A 0.6V 100dB 5.2MHz transconductance amplifier realized in a multi-V/sub T/ process

A fully differential transconductance amplifier (OTA) realized in a standard 0.12/spl mu/m multi-V/sub T/ CMOS process is presented. Its class AB output stage is able to drive large capacitive loads with rail-to-rail signal swing. At 0.6V supply voltage, measured low frequency gain and gain bandwidth product exceed 100dB and 5.2MHz, respectively. Proper operation is achieved for supply voltages between 0.5V and 0.9V.