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Phase noise of oscillators with unsaturated amplifiers

Kenig, Eyal and Cross, M. C. and Moehlis, Jeff and Wiesenfeld, Kurt (2013) Phase noise of oscillators with unsaturated amplifiers. Physical Review E, 88 (6). Art. No. 062922. ISSN 1539-3755.

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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.

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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.
Funding AgencyGrant Number
Defense Advanced Research Projects Agency (DARPA)UNSPECIFIED
Issue or Number:6
Classification Code:PACS: 05.45.-a, 84.30.Ng, 85.85.+j
Record Number:CaltechAUTHORS:20140124-082359452
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:43500
Deposited By: Tony Diaz
Deposited On:29 Jan 2014 20:13
Last Modified:03 Oct 2019 06:08

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