Sliding-Mode Amplitude Control Techniques for Harmonic Oscillators

This paper investigates both theoretical and implementation-level aspects of switching-feedback control strategies for the development of harmonic oscillators. We use sliding-mode compensation based on various norms of the system state to achieve amplitude control over a wide-tuning range. A 7.6-MHz...

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Bibliographic Details
Published in:IEEE transactions on circuits and systems. II, Express briefs Express briefs, 2007-11, Vol.54 (11), p.1014-1018
Main Authors: Marquart, C.A., Zourntos, T., Magierowski, S., Mathai, N.J.
Format: Article
Language:English
Subjects:
Amplitude control
Amplitudes
analog circuits
Circuits
Control systems
Degradation
Frequency measurement
harmonic distortion
Harmonic oscillators
Noise measurement
nonlinear systems
Norms
Oscillators
Phase measurement
Phase noise
Sliding mode control
Strategy
Testing
Tuning
voltage-controlled oscillator (VCO)
wide tuning range
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Summary:This paper investigates both theoretical and implementation-level aspects of switching-feedback control strategies for the development of harmonic oscillators. We use sliding-mode compensation based on various norms of the system state to achieve amplitude control over a wide-tuning range. A 7.6-MHz I/Q LC oscillator is developed and tested. Measurements show that implementation of the proposed switch-based amplitude controller provides accurate amplitude control over the entire frequency tuning range while inducing only a minor phase noise degradation (of less than 2 dBc/Hz).
ISSN:1549-7747
1558-3791
DOI:10.1109/TCSII.2007.903793