National Conference On Emerging Trends in Information, Digital & Embedded Systems (NC'e-TIDES -15) Organized by Power Efficient Class AB Op-Amps with High and Symmetrical Slew Rate

ABSTRACT: We introduced various class AB two stage op-amps with high and approximately symmetrical slew rate and very simple architecture are introduced. A combination of adoptive loads and current replicating branch with scaled-down transistors is used to implement a push-pull output stage with maximum output current several times higher than the bias current.post layout simulation and measurement results are presented and verify a 400%-500% slew rate and 80%-100%GB enhancement with only 5% additional quiescent power dissipation and 20% silicon area increase