±0.5 V 15 $\mu$ W Recycling Folded Cascode Amplifier With 34767 MHz·pF/mA FOM

An enhanced super class AB recycling folded cascode (RFC) operational transconductance amplifier is presented. It combines various adaptive biasing and transconductance enhancement techniques. Measurement results of a CMOS 130 nm test chip prototype show an improvement in slew rate and gain-bandwidth product by factors 100 and 27, respectively, compared to the conventional RFC topology for the same supply voltage and bias currents.