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Abstract
Op-amps have wide range of applications and are the basic building block in many applications. As we know that most of the signals present in environment are analog signals and when these signals are fed as input signal, the noise which is present in that signal also gets amplified. Therefore op-amp should be designed in such a way that the noise margin should be high so that reliable amplification can be achieved. This paper shows the design analysis of conventional and Miller configuration of two stage Op-amps @ 180nm technology using Cadence Virtuoso and the results of both Op-amps are concluded.