Phase noise of oscillators with unsaturated amplifiers
Abstract
We study the role of amplifier saturation in eliminating feedback noise in self-sustained oscillators. We extend previous works that use a saturated amplifier to quench fluctuations in the feedback magnitude, while simultaneously tuning the oscillator to an operating point at which the resonator nonlinearity cancels fluctuations in the feedback phase. We consider a generalized model which features an amplitude-dependent amplifier gain function. This allows us to determine the total oscillator phase noise in realistic configurations due to noise in both quadratures of the feedback, and to show that it is not necessary to drive the resonator to large oscillation amplitudes in order to eliminate noise in the phase of the feedback.
Additional Information
© 2013 American Physical Society. Received 9 September 2013; published 23 December 2013. The authors wish to thank Stephen Wandzura and Harris P. Moyer for helpful discussions. This research was supported by DARPA through the DEFYS program.Attached Files
Published - PhysRevE.88.062922.pdf
Submitted - 1310.7524.pdf
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Additional details
- Eprint ID
- 43500
- Resolver ID
- CaltechAUTHORS:20140124-082359452
- Defense Advanced Research Projects Agency (DARPA)
- Created
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2014-01-29Created from EPrint's datestamp field
- Updated
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2021-11-10Created from EPrint's last_modified field