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Convention Paper

Modeling the Nonlinear Behavior of Operational Amplifiers

Authors: Gaskell, Robert-Eric

AES Convention 137 · Paper 9206 · October 2014

Abstract

Due to the gain-bandwidth characteristics of operational amplifiers, their nonlinearities are frequency dependent, showing a rise in distortion at higher frequencies. Depending on the circuit and system implementations, this distortion can be significant to listener perception of sonic character and quality and is therefore relevant to models of op amp-based analog equipment. Power-series models of the harmonic signature of various op amp nonlinearities are developed with and without this frequency dependence. Listening tests are performed to determine the extent to which the distortion characteristic of the model must match that of the real component to create a perceptually similar result.

Details

Published in
AES Convention 137
AES Convention
137
Paper number
9206
Publication date
October 6, 2014
Session subject
Signal Processing
Affiliation
McGill University, Montreal, QC, Canada; GKL Audio Inc., Montreal, QC, Canada (See document for exact affiliation information.)
Type
Convention Paper