Design Guidelines for Two-Stage Cascode-Compensated Operational Amplifiers

A new methodology for the design of two-stage cascode-compensated operational amplifiers (opamps) is proposed in this paper. It specifies proper open-loop circuit-level parameters regarding the desired bandwidth and closed-loop stability. As the effect of the zeros of the open-loop transfer function has been taken into account, the presented methodology becomes more accurate than previous methodologies. New capacitor sizing rules for splitting the capacitor of cascode compensation into two capacitors for the implementation of hybrid-cascode compensation is also proposed to make the compensation scheme more efficient.