A wideband Colpitts VCO with 30% continuous frequency tuning range using a tunable phase shifter

A wideband Colpitts VCO using an analog tunable phase shifter as the frequency tuning component is presented. The tunable phase shifter is used as the resonator in a common collector Colpitts oscillator. An inductor is added in series with one of the feedback capacitors to avoid oscillation at highe...

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Bibliographic Details
Published in2010 IEEE International Conference of Electron Devices and Solid-State Circuits pp. 1 - 4
Main Authors Ying Chen, Mouthaan, K, Geurts, M
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.12.2010
Subjects
Colpitts oscillator
Frequency measurement
Harmonic analysis
Phase shifters
Resonant frequency
tunable phase shifter
Tuning
VCO
Voltage-controlled oscillators
Wideband
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Summary:A wideband Colpitts VCO using an analog tunable phase shifter as the frequency tuning component is presented. The tunable phase shifter is used as the resonator in a common collector Colpitts oscillator. An inductor is added in series with one of the feedback capacitors to avoid oscillation at higher order resonances of the phase shifter. The proposed VCO has a measured continuous frequency tuning range of 30% from 569 MHz to 767 MHz, and a measured phase noise between -117 dBc/Hz and -124 dBc/Hz at 1 MHz offset.
ISBN:9781424499977
1424499976
DOI:10.1109/EDSSC.2010.5713763