Active biasing of multistage CMOS op-amps for performance enhancement

The technique of active biasing is introduced and applied to a high-gain fu lly differential two-stage CMOS cascode op-amp, in order to enhance its var ious performance metrics such as gain, unity gain frequency, common mode an d power supply rejection ratios, slew rate and settling time. The improved performance is predicted theoretically and substantiated through circuit si mulations.