Design and Evaluation of Two Stage Op-Amp for Biomedical Applications Using 90nm CMOS Technology

In mixed-mode and analog devices, the CMOS operational amplifiers are widely employed as an essential element in recent year. The design and analysis of CMOS-based Functional Amplifiers for medical applications with low power consumption, moderate bandwidth, high gain are the main objectives of this study. With Miller Compensation, the op-amp demonstrated a gain of about 69.6 for 0.8v and 68.3 for 1.6v, bandwidth of approximately 27.9 for 0.8 and 28.5 for 1.6v, and power dissipation of around 289uW for 1.6v and 282uW for 0.8v. The circuit designs were created using the Cadence Virtuoso environment in the GPDK 90-nm CMOS technology.