Electronically controlled multiphase sinusoidal oscillators using current amplifiers

Authors:
George Souliotis;Costas Psychalinos
Affiliations:
Electronics Laboratory, Physics Department, University of Patras, GR-26504 Rio Patras, Greece;Electronics Laboratory, Physics Department, University of Patras, GR-26504 Rio Patras, Greece
Venue:
International Journal of Circuit Theory and Applications
Year:
2009

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Abstract

A novel current-mode multiphase oscillator topology is introduced in this letter. This is realized by employing current amplifiers and only grounded capacitors. Attractive characteristics offered by the new topology are the electronic adjustment of the oscillation frequency, the absence of passive resistors, and the requirement of only grounded capacitors. Comparison with the corresponding already published current follower based structure shows that the proposed topology has better performance in terms of the number of required active elements, the employment of passive resistors, and the ability for electronic adjustment of the oscillation frequency. Copyright © 2008 John Wiley & Sons, Ltd.