NDLI: More on the <formula formulatype=inline><tex>$1/{rm f}^{2}$</tex> </formula> Phase Noise Performance of CMOS Differential-Pair <emphasis>LC</emphasis>-Tank Oscillators

Content Provider	IEEE Xplore Digital Library
Author	Andreani, P. Fard, A.
Copyright Year	1966
Abstract	This paper presents a rigorous phase noise analysis in the 1/f² region for the differential CMOS LC-tank oscillator with both nMOS and pMOS switch pairs. A compact, closed-form phase noise equation is obtained, accounting for the noise contributions from both tank losses and transistors currents, which allows a robust comparison between LC oscillators built with either one or two switch pairs. The fabricated oscillator prototype is tunable between 2.15 and 2.35 GHz, and shows a phase noise of -144 dBc/Hz at 3 MHz offset from the 2.3 GHz carrier for a 4 mA bias current. The phase noise figure-of-merit is practically constant across the tuning range, with a minimum of 191.5 dBc/Hz. A reference single-switch-pair oscillator has been implemented and tested as well, and the difference between the phase noise levels displayed by the two oscillators is very nearly the one expected from theory
Sponsorship	IEEE Solid-State Circuits Society IEEE Electron Devices Society IEEE Circuits and Systems Society Japan Society of Applied Physics (JSAP) IEEE Microwave Theory and Techniques Society IEEE San Francisco Section Bay Area Council Univ. PA IEEE
Starting Page	2703
Ending Page	2712
Page Count	10
File Size	1034268
File Format	PDF
ISSN	00189200
Volume Number	41
Issue Number	12
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2006-12-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Phase noise Oscillators Switches MOS devices Equations Noise robustness Prototypes Noise measurement Tuning Testing VCOs CMOS LC oscillators phase noise
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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