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Sliding-Mode Amplitude Control Techniques for Harmonic Oscillators

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4 Author(s)
Marquart, C.A. ; Texas A&M Univ., College Station ; Zourntos, T. ; Magierowski, S. ; Mathai, N.J.

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).

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Circuits and Systems II: Express Briefs, IEEE Transactions on  (Volume:54 ,  Issue: 11 )