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Title: A wide tuning range gated varactor
Authors: Wong, Wallace Ming Yip
Hui, Frankie
Chen, Zhiheng
Shen, Keqiang
Lau, Jack
Chan, Philip Ching-Ho
Ko, Ping K.
Keywords: Varactors
Voltage-controlled oscillators
Radio frequency
Circuit tunning
CMOS process
Issue Date: May-2000
Citation: IEEE journal of solid state circuits, v. 35, no. 5, May 2000, p. 773-779
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 ±50%. The new device can be implemented with standard CMOS process without any post-processing. A 2 G Hz prototype VCO is implemented using the new varactor in a 0.35 μm CMOS process. The VCO achieved a sensitivity of 220 M Hz/V.
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