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


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) identifier identifier

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.