Compact Power-Efficient Static Class-AB Miller Op-amp with Enhanced Large and Small Signal Figures of Merit
2021
A class-AB Miller op-amp with symmetrical and significantly enhanced slew-rate and accurately controlled output quiescent current is introduced. It can drive a wide range of resistive and capacitive loads. The output currents can be a factor 16 times higher than the total op-amp quiescent current. Power-efficient static class-AB operation is achieved by including a simple low-power auxiliary amplifier with resistive local common-mode feedback. It has the small-signal figure of merit FOM SS of 28 and 27 for R L =1MΩ and 200Ω.
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