A Sinusoidal Nonlinear Oscillator with Adjustable Frequency

Authors

  • Nithima Hanmeng Department of Control Engineering, Faculty of Engineer, King’s Mongkut Institute of Technology Ladkrabang, Bangkok 10520, Thailand.
  • Poramate Pranayanuntana Department of Control Engineering, Faculty of Engineer, King’s Mongkut Institute of Technology Ladkrabang, Bangkok 10520, Thailand.

Keywords:

OTA, describing function, nonlinear oscillator, frequency adjustment

Abstract

A sinusoidal nonlinear oscillator with adjustable frequency was studied. The frequency of oscillation was adjusted via the change of the center frequency of the second order band-pass filter, while keeping the quality factor constant. The describing function method was used to predict the limit cycles and to analyze the stability of oscillation. The proposed circuit consisted of two important parts in the feedback connection configuration: an operational transconductance amplifier (OTA) as a nonlinear element in feedback path; and a bandpass filter in the feedforward path. The experimental results were simulated by the ORCAD CAPTURE and MATLAB computer programs.

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Published

2009-12-31

How to Cite

Nithima Hanmeng, and Poramate Pranayanuntana. 2009. “A Sinusoidal Nonlinear Oscillator With Adjustable Frequency”. Agriculture and Natural Resources 43 (5). Bangkok, Thailand:372-78. https://li01.tci-thaijo.org/index.php/anres/article/view/244845.

Issue

Vol. 43 No. 5 (2009): January-December

Section

Research Article

License

online 2452-316X print 2468-1458/Copyright © 2022. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/),
production and hosting by Kasetsart University of Research and Development Institute on behalf of Kasetsart University.