NDLI: A low phase-noise CMOS VCO with harmonic tuned LC tank

Content Provider	IEEE Xplore Digital Library
Author	Huijung Kim Seonghan Ryu Yujin Chung Jinsung Choi Bumman Kim
Copyright Year	1963
Abstract	This paper presents a phase-noise reduction technique for voltage-controlled oscillators (VCOs) using a harmonic tuned (HT) LC tank. The phase-noise suppression is achieved through almost rectangular-shaped voltage at the switching differential cell, which effectively maximizes the slope of the switching cell output voltage at a zero crossing point. In addition, the proposed technique also suppresses the down-conversion of the noise around the second harmonic frequency by the second harmonic short of the tank. One second HT VCO and two third HT VCOs are designed and implemented to evaluate the concept using a 0.35- and 0.13-/spl mu/m CMOS process. The figure-of-merit (FOM) of the second HT VCO, third HT VCO1, and third HT VCO2 are -180.7, -183.7, and -189.5, respectively. The best FOM performance of the VCO has phase noises of -100.4, -132.0, and -140.8dBc/Hz at 100-kHz, 1-MHz, and 3-MHz offset frequencies at the 2-GHz carrier, respectively. This VCO consumes 3.29 mA from a 1.8-V supply with the silicon area of 500 /spl mu/m/spl times/750 /spl mu/m.
Sponsorship	IEEE Microwave Theory and Techniques Society
Starting Page	2917
Ending Page	2924
Page Count	8
File Size	1192898
File Format	PDF
ISSN	00189480
Volume Number	54
Issue Number	7
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2006-07-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Voltage-controlled oscillators Phase noise Frequency Semiconductor device noise Zero voltage switching 1f noise Silicon CMOS technology Information technology Companies voltage-controlled oscillator (VCO) CMOS harmonic tuned (HT) LC tank low phase noise
Content Type	Text
Resource Type	Article
Subject	Condensed Matter Physics Electrical and Electronic Engineering Radiation

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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