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A voltage controlled oscillator using barium strontium titanate (BST) thin film varactor

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8 Author(s)
Victor, A. ; Electr. & Comput. Eng. Dept., North Carolina State Univ., Raleigh, NC, USA ; Nath, J. ; Ghosh, D. ; Boyette, B.
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Barium strontium titanate (BST) has a field-dependent permittivity and can be used as a dielectric in voltage tunable capacitors or varactors. These BST-based varactors are passive devices and have significantly different properties compared to semiconductor varactors. A voltage tunable oscillator using a BST thin film varactor was designed and characterized. The frequency of oscillation varied from 34.8 MHz to 44.5 MHz (28% tuning) upon application of 7 V tuning voltage. The VCO gain was 1.38 MHz/V and the 2nd harmonic was over 23 dB below the fundamental throughout the tuning range.

Published in:
Radio and Wireless Conference, 2004 IEEE

Date of Conference: 19-22 Sept. 2004

Page(s):
91 - 94
Print ISBN:
0-7803-8451-2
INSPEC Accession Number:
8231377
Digital Object Identifier :
10.1109/RAWCON.2004.1389079
Product Type:
Conference Publications

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