A 18 µA Rail-to-Rail Class-AB Operational Amplifier with a High-Slew Miller Compensation (HSMC) Technique with 240% Settling Time Reduction in 0.18 µm

This paper presents a rail-to-rail class-AB operation amplifier with a proposed high-slew Miller compensation technique and current limiter for the output stage. Owing to the proposed Miller compensation technique, the amplifier achieves a maximum slew-rate of 30 V/µs while consuming a low quiescent current of 18µA. Among the state-of-the-art devices, the proposed amplifier has the best FOML of 34.72 for average slew-rate and FOMs of 10.11 for unity gain frequency.