Single Stage Folded-Cascode Operational Amplifier

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Abstract

This paper mainly concentrates on designing a single-stage folded cascode op-amp with UMC 180nm technology. The amplifier operates seamlessly within the confines of a 1.8V power supply, shows a DC gain of 55dB, a phase margin of 66.87 degrees, and the amplifier’s bandwidth is reported at 222kHz (-3dB) for a 1pF load. It works with ICMR range from 1.6V-0.8V. The proposed structure yields medium gain and wide output swing ranging from 300mV to 1.4V.

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Keywords

Current mirror; Folded Cascode; Operation-amplifier (Op-amp); Wide swing.