A Simple and Accurate Formula for Oscillating Amplitude of CMOS LC Differential Oscillator

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Published: Jan 20, 2015
DOI: https://doi.org/10.37936/ecti-eec.2015131.170938

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Nikorn Hen- ngam
Department of Information Technology, Faculty of Industrial Technology, Ubon Ratchathani Rajabhat University
Jirayuth Mahatanakul
Department of Electronics Engineering, Mahanakorn University of Technology Nongchok

Abstract

The conventional formula for the oscillation amplitude of the CMOS LC differential oscillator was derived under the assumption that the current from sourced coupled pair flowing though LC tank is a square wave. This is not in line with the real situation and the obtained formula is independent of the MOSFET parameters. In this paper, aderivation of a simple and accurate expression for oscillating amplitude of CMOS LC differential oscillator in which the current from sourced coupled pair is assumed to be clipped sinusoid is presented. By comparing to the simulation results, it was found that the new expression of oscillating amplitude is more accurate than the widely used conventional expression.

Article Details

How to Cite
Hen- ngam, N., & Mahatanakul, J. (2015). A Simple and Accurate Formula for Oscillating Amplitude of CMOS LC Differential Oscillator. ECTI Transactions on Electrical Engineering, Electronics, and Communications, 13(1), 18–25. https://doi.org/10.37936/ecti-eec.2015131.170938
Issue
Vol. 13 No. 1 (2015): Regular Issue
Section
Circuits and Systems

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