Title :
Tunable Ferroelectric Capacitor-Based Voltage-Controlled Oscillator
Author :
Jamil, Asad ; Kalkur, Thottam S. ; Cramer, Nicholas
Author_Institution :
Colorado Univ., Colorado Springs, CO
fDate :
2/1/2007 12:00:00 AM
Abstract :
Ferroelectric capacitors made from Ba10.5Sr0.5 TiO3 (BST) are applied as varactors in tunable, high-frequency circuit applications. In this context, a voltage-controlled oscillator (VCO) has been designed and implemented using discrete RF bipolar junction transistor (BJTs) and tunable ferroelectric capacitor. The designed VCO has a tuning range from 205 MHz to 216.3 MHz with a power dissipation of 5.1 mW. The measured phase noise is -90 dBc/Hz at 100 kHz and -140 dBc/Hz at 1 MHz offset
Keywords :
barium compounds; bipolar transistors; ferroelectric capacitors; phase noise; radiofrequency oscillators; strontium compounds; varactors; voltage-controlled oscillators; 100 kHz; 205 to 216.3 MHz; 5.1 mW; VCO; discrete RF bipolar junction transistor; phase noise; power dissipation; tunable ferroelectric capacitor; varactors; voltage-controlled oscillator; Binary search trees; Capacitors; Circuit optimization; Ferroelectric materials; Radio frequency; Strontium; Tunable circuits and devices; Tuning; Varactors; Voltage-controlled oscillators; Computer Simulation; Computer-Aided Design; Electric Capacitance; Electromagnetic Fields; Electronics; Equipment Design; Equipment Failure Analysis; Magnetics; Models, Theoretical; Oscillometry;
Journal_Title :
Ultrasonics, Ferroelectrics, and Frequency Control, IEEE Transactions on
DOI :
10.1109/TUFFC.2007.314503
