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Prediction of EMI effects in operational amplifiers by a two-input Volterra series model

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2 Author(s)
Fiori, F. ; Electron. Dept., Politecnico di Torino, Turin, Italy ; Crovetti, P.S.

The authors present a new analytical model that describes the nonlinear behaviour of common CMOS operational amplifiers excited by radio-frequency interference (RFI) added to the input nominal signals. The new model is a valid support to analogue integrated circuit designers since it expresses a relationship between circuit parameters, parasitic elements and the amplitude of the RFI induced output offset voltage of a feedback CMOS operational amplifier. The validity of model prediction has been verified through a comparison with experimental and computer simulation results.

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Circuits, Devices and Systems, IEE Proceedings -  (Volume:150 ,  Issue: 3 )