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Design and Simulation of Full Differential Op-Amp Based on Sample and Hold Circuit

Wuchen Wu

Abstract

In this paper a full differential operational amplifier was designed.It analyzed and verified the AC characteristics and transient characteristics of operational amplifier.The operational amplifier based on the folded cascade structure, SC-CMFB, low voltage and wide out put swing bias circuit to obtain a high unity gain bandwidth, a wide output voltage swing.The simulation and verification were based on Cadence environment and CSMC 0.6um process model.The results show that the properties of operational amplifier completely meet the design requirements.

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Key concepts: Computer science, Operational amplifier, Cadence, Current-feedback operational amplifier, Fully differential amplifier, Op amp integrator, Swing, Input offset voltage