DocumentCode
2521783
Title
A wideband Colpitts VCO with 30% continuous frequency tuning range using a tunable phase shifter
Author
Chen, Ying ; Mouthaan, Koen ; Geurts, Marcel
Author_Institution
Dept. of Electr. & Comput. Eng., Nat. Univ. of Singapore, Singapore, Singapore
fYear
2010
fDate
15-17 Dec. 2010
Firstpage
1
Lastpage
4
Abstract
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.
Keywords
capacitors; inductors; phase shifters; voltage-controlled oscillators; feedback capacitors; frequency 569 MHz to 767 MHz; frequency tuning range; inductor; tunable phase shifter; wideband Colpitts VCO; Frequency measurement; Harmonic analysis; Phase shifters; Resonant frequency; Tuning; Voltage-controlled oscillators; Colpitts oscillator; VCO; Wideband; tunable phase shifter;
fLanguage
English
Publisher
ieee
Conference_Titel
Electron Devices and Solid-State Circuits (EDSSC), 2010 IEEE International Conference of
Conference_Location
Hong Kong
Print_ISBN
978-1-4244-9997-7
Type
conf
DOI
10.1109/EDSSC.2010.5713763
Filename
5713763
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