A practical method for modeling amplifier nonlinearities

A practical and efficient method to quickly model and evaluate the nonlinearities of an amplifier is presented. The proposed approach is based on "polyfit" function, provided by Matlab. As a demonstration, this method is applied to modeling amplifier nonlinearities in sigma delta modulator...

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Bibliographic Details
Published in2012 19th IEEE International Conference on Electronics, Circuits, and Systems (ICECS 2012) pp. 621 - 624
Main Authors Ali, S., Tanner, S., Farine, P. A.
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.12.2012
Subjects
Amplifier Nonlinearities
Gain
Integrated circuit modeling
Low Voltage
Mathematical model
MATLAB
Modulation
Noise
Polynmial fitting Adaptations
Polynomials
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Summary:A practical and efficient method to quickly model and evaluate the nonlinearities of an amplifier is presented. The proposed approach is based on "polyfit" function, provided by Matlab. As a demonstration, this method is applied to modeling amplifier nonlinearities in sigma delta modulators, however it can be applied to other type of circuits as well. This method provides the designer good accuracy (within a few dBs). At the same time it provides the speed advantage of high level programming environments like Matlab, Simulink etc. Simulation results are presented to validate the concept.
ISBN:1467312614
9781467312615
DOI:10.1109/ICECS.2012.6463670