Wide tuning range inversion-mode gated varactor and its application on a 2-GHz VCO
|Authors||Wong, Wallace Ming Yip
Chan, Philip Ching-Ho
Ko, Ping K.
|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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