Provided by: Iosrjournals
Date Added: Oct 2014
In this paper, a humidity sensor readout circuitry using two stage opamp is designed. This circuitry is realized in TSMC 0.18um CMOS technology. Designing of two-stage op-amps is a multi-dimensional-optimization problem where optimization of one or more parameters may easily result into degradation of others. The OPAMP circuit is designed to exhibit a unity gain frequency of 2.02GHz and exhibits a gain of 49.02dB with a 60.50 phase margin and CMRR 39dB, Slew Rate 154dB, UGB (Unity Gain Bandwidth) are in a higher unity gain frequency under the same load condition.