Dual Stage CMOS Operational Amplifier Design in Sky-Water 130nm Technology

A Two stage CMOS OPAMP with frequency compensation has been designed using open source Google’s SkyWater 130nm Technology. This OPAMP operates at 1.8V of Vdd single supply voltage. This circuit has been designed and simulated using eSim open source EDA tool developed by IIT Bombay. Pre-layout simulations of OPAMP gives 62dB of voltage gain with Unity gain bandwidth of 20MHz. Post-layout simulations were carried out using open source MAGIC tool and Ngspice. Post-layout simulations of OPAMP gives 55dB of voltage gain with Unity gain bandwidth of 120MHz with output slew rate of 38 V/µs. It is a low power OPAMP with power consumption of 54µW.