A New Class AB Multipath Telescopic-Cascode Operational Amplifier

A novel class AB architecture for single stage multipath differential amplifier is presented. The proposed amplifier combines the flipped voltage follower(FVF) fordifferential input and the nonlinear current mirror for active load. Applying these techniques to telescopic-cascode amplifier increases the unity-gain bandwidth, the DC gain and the slewrate while the same power consumption as the conventional telescopic cascade is achieved.

Keywords:

Operational amplifier , class AB , filliped voltage follower(FVF) , wide swing nonlinear currentmirror , nonlinear current mirror , switched –capacitor circuit