Open-Loop Analysis of Cascode Compensation

This paper presents a new open-loop analysis for cascode compensation scheme which is often used in high speed two-stage CMOS operational amplifiers (opamps). In the proposed analysis, the effect of zeros in the transfer function is also considered. Analytical approaches in this paper show that cascode compensation is more power efficient than conventional Miller compensation especially for large capacitive loads. Circuit-level simulation based on the derived equations is performed to see the accuracy of derived equations