Frequency noise in current-starved CMOS LC tank oscillators

Conference: NDES 2012 - Nonlinear Dynamics of Electronic Systems
07/11/2012 - 07/13/2012 at Wolfenb├╝ttel, Germany

Proceedings: NDES 2012

Pages: 4Language: englishTyp: PDF

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

Abstract:
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.