A wide tuning range gated varactor

descriptionPublicationkeyboard_double_arrow_right Article 01 May 2000Publisher:Institute of Electrical and Electronics Engineers (IEEE)Journal:IEEE Journal of Solid-State Circuits, volume 35, pages 773-779 (issn: 0018-9200, eissn: 1558-173X,

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Authors: Wallace Ming Yip Wong; Ping Shing Hui; Zhiheng Chen; Keqiang Shen; Jack Lau; Philip C. H. Chan; Ping Keung Ko;

doi: 10.1109/4.841506

A wide tuning range gated varactor

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Abstract

A wide tuning range gated varactor for radio frequency (RF) applications is described in this paper. The gated varactor is a three-terminal device. The third terminal helps achieve an improved tuning range. The measured tuning range of the varactor exceeds /spl plusmn/50%. The new device can be implemented with a standard CMOS process without any post-processing. A 2 GHz prototype voltage-controlled oscillator (VCO) is implemented using the new varactor in a 0.35-/spl mu/m CMOS process. The VCO achieved a sensitivity of 220 MHz/V.

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Hong Kong Polytechnic University
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