Sinusoidal oscillators with lower gain requirements at higher frequencies based on an explicit tanh(x) nonlinearity

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Elwakil A. S. , Ozoguz S., SALAMA K. N.

INTERNATIONAL JOURNAL OF CIRCUIT THEORY AND APPLICATIONS, vol.38, no.7, pp.747-760, 2010 (SCI-Expanded)

• Publication Type: Article / Article
• Volume: 38 Issue: 7
• Publication Date: 2010
• Doi Number: 10.1002/cta.592
• Journal Name: INTERNATIONAL JOURNAL OF CIRCUIT THEORY AND APPLICATIONS
• Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
• Page Numbers: pp.747-760
• Istanbul Technical University Affiliated: No

Abstract

Two novel sinusoidal oscillator structures with an explicit tanh(x) nonlinearity are proposed. The oscillators have the attractive feature: the higher the operating frequency, the lower the necessary gain required to start oscillations. A nonlinear model for the two oscillators is derived and verified numerically. Spice simulations using AMS BiCMOS 0.35 mu model parameters and experimental results are shown. Copyright (C) 2009 John Wiley & Sons, Ltd.