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Wide tuning range inversion-mode gated varactor and its application on a 2-GHz VCO

Authors Wong, Wallace Ming Yip
Hui, Frankie
Chen, Zhiheng
Shen, Keqiang
Lau, Jack
Chan, Philip Ching-Ho
Ko, Ping K.
Issue Date 1999
Source 1999 Symposium on VLSI Circuits. Digest of Papers. Japan Soc. Appl. Phys. , 1999, p. 53-4. Tokyo, Japan
Summary This paper presents a novel inversion-mode three-terminal varactor with a capacitance ranging from 0.7 pF to 2.3 pF, achieving a ±53% variation in the capacitance. The new device is implemented in a 0.35-μm standard CMOS process. The measured quality factor is 22 at 2 GHz. A 2-GHz VCO is designed with this new varactor and is able to achieve a tuning range of 320 MHz with a maximum tuning gain of 220 MHz/V.
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Language English
Format Conference paper
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