Title :
Wide frequency range sine wave VCO with a tunable inductor and capacitor
Author :
Jensen, Mark Duane ; Howlett, L. Carl
Author_Institution :
Center for Space Eng., Utah State Univ., Logan, UT, USA
fDate :
8/1/1989 12:00:00 AM
Abstract :
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
Keywords :
inductors; variable-frequency oscillators; 100 kHz to 20 MHz; atmospheric measurement; dynamic characteristics; ferrite core; frequency response; parallel tank circuit; plasma frequency probe; series tank; sine wave output; tunable capacitor; tunable inductor; voltage-controlled oscillator; Active inductors; Capacitors; Circuit optimization; Ferrites; Frequency; Magnetic materials; Plasma density; Plasma measurements; Tunable circuits and devices; Voltage-controlled oscillators;
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on
