Title :
Voltage controlled oscillators with ferroelectric capacitors
Author :
Kabir, A. ; Jamil, Asad ; Zhang, Yulan ; Kalkur, T.S.
Author_Institution :
Dept. of Electr. & Comput. Eng., Univ. of Colorado at Colorado Springs, Colorado Springs, CO
Abstract :
Tunable high dielectric constant(K) based on barium strontium titanate (Ba1-xSrxTiO3,x=0.5) varactor was fabricated by RF magnetron sputtering. The varactors have been characterized and a circuit simulation model has been developed. This capacitor has been used as a tunable element in VCO based on Seiler architecture. The VCO has been characterized for tunability and phase noise characteristics.
Keywords :
barium compounds; circuit noise; circuit simulation; circuit tuning; ferroelectric capacitors; permittivity; phase noise; sputtered coatings; strontium compounds; varactors; voltage-controlled oscillators; Ba0.5Sr0.5TiO3; RF magnetron sputtering; Seiler architecture; VCO; barium strontium titanate; circuit simulation model; ferroelectric capacitors; phase noise characteristics; tunable high dielectric constant varactor fabrication; voltage controlled oscillators; Barium; Capacitors; Dielectric constant; Ferroelectric materials; Radio frequency; Strontium; Titanium compounds; Tunable circuits and devices; Varactors; Voltage-controlled oscillators; Ba1−xSrxTiO3; tunable ferroelectric capacitor; varactor; voltage-controlled oscillator (VCO);
Conference_Titel :
Frequency Control Symposium, 2008 IEEE International
Conference_Location :
Honolulu, HI
Print_ISBN :
978-1-4244-1794-0
Electronic_ISBN :
1075-6787
DOI :
10.1109/FREQ.2008.4623030
