Interscience paper needed

Hi members,
Kindly upload the following paper:

Modelling and analysis of differential VCOs
Keywords
non-linear circuits ? perturbation methods ? asymptotic methods ? oscillators ? RF circuits ? voltage-controlled oscillators


Abstract
We present a systematic non-linear analysis of differential voltage controlled oscillators (VCOs), both bipolar and MOS. Using the standard device models, we derive the second-order non-linear equation describing the behaviour of these oscillators, which is formulated in a perturbation form. The solution of this equation is obtained as a particular case of the solution of the most general equation of second-order oscillators, which is solved through a suitable perturbation method. Unlike a pure numerical analysis, simple analytical relationships are derived for predicting the steady-state oscillation, its transient behaviour and for ascertaining the existence of a stable oscillation in differential VCOs. These relationships, leading to results which well agree with the SPICE simulations, are useful in both analysis and design. Copyright ? 2004 John Wiley & Sons, Ltd.



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Received: 18 June 2003; Accepted: 16 January 2004
Digital Object Identifier (DOI)


http://doi.wiley.com/10.1002/cta.270


Thanks in advance.[/b]