Tunable Ferroelectric Capacitor-Based Voltage-Controlled Oscillator

Ferroelectric capacitors made from Ba 10.5 Sr 0.5 TiO 3 (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 ferroelect...

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Bibliographic Details
Published in:IEEE transactions on ultrasonics, ferroelectrics, and frequency control ferroelectrics, and frequency control, 2007-02, Vol.54 (2), p.222-226
Main Authors: Jamil, A., Kalkur, T.S., Cramer, N.
Format: Article
Language:English
Subjects:
Acoustics
Barium strontium titanates
Binary search trees
Capacitors
Circuit optimization
Circuits
Computer Simulation
Computer-Aided Design
Electric Capacitance
Electromagnetic Fields
Electronics
Equipment Design
Equipment Failure Analysis
Exact sciences and technology
Ferroelectric materials
Ferroelectricity
Fundamental areas of phenomenology (including applications)
General equipment and techniques
Instruments, apparatus, components and techniques common to several branches of physics and astronomy
Magnetics
Models, Theoretical
Oscillometry - instrumentation
Physics
Radio frequency
Strontium
Titanium dioxide
Transducers
Tunable circuits and devices
Tuning
Ultrasonics, quantum acoustics, and physical effects of sound
Varactors
Voltage controlled oscillators
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Description
Summary:Ferroelectric capacitors made from Ba 10.5 Sr 0.5 TiO 3 (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
ISSN:0885-3010
1525-8955
DOI:10.1109/TUFFC.2007.314503