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Wide frequency range sine wave VCO with a tunable inductor and capacitor

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2 Author(s)
M. D. Jensen ; Center for Space Eng., Utah State Univ., Logan, UT, USA ; L. C. Howlett

A voltage-controlled oscillator (VCO) with sine wave output has been built using a tunable inductor along with a tunable capacitor to operate at frequencies ranging from 100 kHz to over 20 MHz. The method of tuning the inductor by changing the permeability of its ferrite core and the ability to extend the frequency response of the core are discussed. Dynamic characteristics of the VCO are explained with examples of a parallel and series tank implementation

Published in:

IEEE Transactions on Instrumentation and Measurement  (Volume:38 ,  Issue: 4 )