Analysis of nonlinear RC op-amp oscillators utilizing phase space techniques

Author

David L. Macintire

Date of Award

8-1985

Degree Type

Thesis

Degree Name

Master of Science

Major

Electrical Engineering

Major Professor

Joseph M. Googe

Committee Members

J. M. Bailey, A. O. Bishop

Abstract

This thesis presents the results of a study of applying phase space and describing function analysis to a class of nonlinear oscillators. The oscillators are nonlinear because they use thyristor elements in the feedback path of the operational amplifier. The op-amp is the active device used in the oscillator model. Phase space analysis is applied directly to second and third-order RC models in conjunction with computer solution of the state equations and computer plots of the output state variable. A fourth-order phase shift model is also considered. A design criterion is developed based upon the peak value of the output state variable and the input resistor to the op-amp. Describing function analysis demonstrates that the linearized differential equation closely follows a linear version of the nonlinear oscillator considered.

Recommended Citation

Macintire, David L., "Analysis of nonlinear RC op-amp oscillators utilizing phase space techniques. " Master's Thesis, University of Tennessee, 1985.
https://trace.tennessee.edu/utk_gradthes/14067