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Small VCO-Gain Variation Adding a Bias-Shifted Inversion-Mode MOS Varactor

Title
Small VCO-Gain Variation Adding a Bias-Shifted Inversion-Mode MOS Varactor
Author
윤태열
Keywords
Inversion-mode MOS (I-MOS) varactor; voltage-controlled oscillator (VCO) gain (KVCO); VCO-gain variation (Delta KVCO)
Issue Date
2017-03
Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
Citation
IEEE MICROWAVE AND WIRELESS COMPONENTS LETTERS, v. 27, no. 4, page. 395-397
Abstract
This letter proposes a small voltage-controlled oscillator (VCO)-gain variation (Delta KVCO) technique using the capacitance-slope change of the varactor, which is achieved by adding a bias-shifted inversion-mode MOS varactor in parallel with a conventional accumulation-mode MOS varactor. This technique is investigated via theoretical analysis, which is confirmed by simulation and measurement. The proposed VCO shows a phase noise of -116.4 dBc/Hz at a 1-MHz offset frequency at 2.36 GHz, a figure of merit of -185 dBc/Hz, and a Delta KVCO of less than 8.6% over a frequency tuning range from 1.73 to 2.36 GHz while consuming 0.76 mW from a 0.8-V supply voltage. It was implemented using a 110-nm CMOS process with a chip area of 0.95 mm(2).
URI
https://ieeexplore.ieee.org/document/7884979https://repository.hanyang.ac.kr/handle/20.500.11754/113107
ISSN
1531-1309; 1558-1764
DOI
10.1109/LMWC.2017.2678431
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > ELECTRONIC ENGINEERING(융합전자공학부) > Articles
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