Other Articles by Author(s)

Kittipong Tripetch
Nobuhiko Nakano

Author(s) and WSEAS

Kittipong Tripetch
Nobuhiko Nakano

WSEAS Transactions on Electronics

Print ISSN: 1109-9445
E-ISSN: 2415-1513

Volume 9, 2018

Notice: As of 2014 and for the forthcoming years, the publication frequency/periodicity of WSEAS Journals is adapted to the 'continuously updated' model. What this means is that instead of being separated into issues, new papers will be added on a continuous basis, allowing a more regular flow and shorter publication times. The papers will appear in reverse order, therefore the most recent one will be on top.

A Design of Cross-Coupled Oscillator with Approximate 4th Order Polynomial Rooting Formula

AUTHORS: Kittipong Tripetch, Nobuhiko Nakano

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ABSTRACT: It is well known that input impedance of cross-coupled oscillator circuit has a fourth order denominator polynomial in frequency domain. Thus, it is important to design pole frequency by symbolic formula so that it is oscillate as a sinusoidal signal. It should be noted that in order for cross-coupled oscillator to oscillate, all of four pole frequencies should be positions on imaginary axis. The graph of time domain response is plotted by using inverse Laplace’s transform. Four unknowns and four brackets of poles can be factored which were derived by partial fraction expansion. Time domain response of cross-coupled oscillator is plotted by using 0.5 micron CMOS level1 transistor model.

KEYWORDS: CMOS, Cross-Coupled Oscillator, Input impedance


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WSEAS Transactions on Electronics, ISSN / E-ISSN: 1109-9445 / 2415-1513, Volume 9, 2018, Art. #9, pp. 79-84

Copyright © 2018 Author(s) retain the copyright of this article. This article is published under the terms of the Creative Commons Attribution License 4.0

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