Frequency noise in current-starved CMOS LC tank oscillators

Conference: NDES 2012 - Nonlinear Dynamics of Electronic Systems
07/11/2012 - 07/13/2012 at Wolfenbüttel, Germany

Proceedings: NDES 2012

Pages: 4Language: englishTyp: PDF

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Anders, Jens; Ortmanns, Maurits (Institute of Microelectronics, University of Ulm, 89081 Ulm, Germany)
Boero, Giovanni (Laboratory of Microsysstems, EPFL, 1015 Lausanne, Switzerland)

In this paper we present analytical expressions for the frequency noise of a current-starved CMOS LC tank oscillator originating from the white noise in the coil resistance and the cross-coupled transistor pair. We derive our results by using a Langevin approach to account for the device noise and subsequently solving the resulting stochastic differential equation with the help of a combination of the Stratonovich stochastic averaging method and linearization around the trajectories of the smoothly averaged system.