Design of Two Stage Op - Amp
نویسندگان
چکیده
The Operational Amplifier (Op-Amp) is a fundamental building block in Mixed Signal design. Two stage Op-Amp is one of the most commonly used Op-Amp architectures. In this paper an operational amplifier by CMOS is presented whose input depends on bias current which is 30uA and designed using 1 um technology. In sub-threshold region due to unique behaviour of the MOS transistors not only allows a designer to work at low voltage and also at low input bias current. Most CMOS Op-Amps are designed for specific on-chip applications and are only required to drive capacitive loads of a few pf. In this paper design of a two stage fully differential CMOS operational amplifier is presented. The proposed two stage op amp produces gain of 80 dB. Comparator designed from CMOS Op-Amp is also discussed.
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