In this study, the prototype of CMOS Inverter-Based Differential Amplifier has been developed with ROHM 0.18 mm standard CMOS process. In order to get high DC gain, Nauta’s operational transconductance amplifier (OTA) is adopted as the amplifier stage and nested miller compensation is selected as the phase compensation. The measurement results indicate that power consumption is 18µW, DC Gain is 71dB, input offset voltage is 1.2mV, CMRR is 57dB and PSRR is 83dB at the supply voltage
VDD=1V.
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