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Active and Passive Electronic Components
Volume 25 (2002), Issue 1, Pages 83-95

Passive On-Chip Components for Fully Integrated Silicon RF VCOs

Microelectronic Circuit Design Group, National Technical University of Athens, Greece

Received 6 November 2001; Revised 3 December 2001

Copyright © 2002 Hindawi Publishing Corporation. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


In this work integrated passive devices used in RF VCOs are presented. The operation of on-chip inductors and variable capacitors is outlined along with simple electrical equivalent circuits suitable for hand calculations. Design examples of passive devices operating at 5 and 6 GHz in a commercial HBT BiCMOS process are also presented. The parallel resonator quality factor is computed as a function of inductor L capacitor C and their respective losses RSL and RSC .