Abstract

For certain applications, high bandwidth operational amplifiers are required. This necessitates research into the area of op-amp bandwidth expansion without influencing any other parameters significantly. This study presents a CMOS two-stage 0perational amplifier, that operates at 1.8 V power supply in 180 nm technology and has a bias current dependent input terminal. The supply voltage has been reduced to lower the system’s overall power usage. Our primary goal is to reduce power loss, higher gain, and higher difference between maximum voltage and minimum voltage at output port. There is a trade-off between rate, power, and benefit at high supply voltages. The rate, power, and benefit of any circuit determine its performance. This op-amp has low standby power expenditure, with high driving capability, and runs at low voltage, consequential a low-power circuit. The op-amp has a gain of 70.37 decibel, a bandwidth of 53.01 MHz, and a phase margin of 27.83 degree. The operational amplifier power consumption and CMRR are also determined as 523µW and 73.33 decibel, respectively.

Authors

Durgesh Pratap¹,Nishant Singh²,Shiksha Jain³
Dr. Rammanohar Lohia Avadh University, India^1,2,3

Keywords

Low Power, Phase Margin, CMOS, Op-Amp