NDLI: Optimization and Realization of a 315-MHz Low-Phase-Noise Voltage-Controlled SAW Oscillator

Content Provider	IEEE Xplore Digital Library
Author	Xianhe Huang Yan Wang Wei Fu
Copyright Year	2004
Abstract	In this paper, the formulation of Q_L is derived from the analysis of the Butler common-base surface acoustic wave (SAW) oscillator circuit. The prototype 315-MHz Butler SAW oscillator is designed, and phase-noise results before and after adding voltage-control components are measured. The SAW resonator utilized is R315 with an unloaded quality factor Q₀ of about 1.06×10⁴. The measured results of phase noise without voltage control are -159 dBc/Hz at 10 kHz and better than -165 dBc/Hz at 100 kHz. After adding the low-voltage varactor BB155, the measured phase-noise results with different control voltages are presented. When only one varactor is added in the actual circuit, the voltage-controlled slope is 4.8 kHz/V, and the measured phase-noise results are better than -155 dBc/Hz at 10 kHz and -165 dBc/Hz at 100 kHz with different control voltages of 4, 6, and 8 V. When two varactors in series are used, the voltage-controlled slope is 9.5 kHz/V, and the measured phase-noise results are better than -155 dBc/Hz at 10 kHz and -165 dBc/Hz at 100 kHz with different control voltages of 4, 6, and 8 V. Experimental results show that the phase-noise level of the 315-MHz voltage-controlled SAW oscillator with a wide voltage-controlled range can be ameliorated based on improving Q_L.
Sponsorship	IEEE Circuits and Systems Society
Starting Page	16
Ending Page	19
Page Count	4
File Size	557618
File Format	PDF
ISSN	15497747
Volume Number	59
Issue Number	1
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2012-01-01
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 measurement Voltage control Surface acoustic waves Phase noise Phase measurement Varactors voltage-controlled SAW oscillator (VCSO) Butler oscillator circuit loaded quality factor phase noise SAW
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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