Super current recycling folded cascode amplifier with ultra-high current efficiency

Abstract An ultra-high current efficiency current recycling folded cascode amplifier is presented in this paper. To improve the current efficiency of conventional recycling folded cascode amplifier, it utilizes adaptive biasing class-AB input stage and local common-mode feedback techniques, leading to a boost in gain-bandwidth and slew rate. Both conventional and proposed recycling folded cascode amplifiers are designed on CSMC 180 nm process. Simulation results demonstrate that the proposed current recycling amplifier achieves 3.2 times the gain-bandwidth and 7.7 times the slew rate that of traditional counterpart with only 25% additional power consumption.