NDLI: Mode-Selection and Mode-Feedback Techniques Optimizes VCXO (Voltage Controlled Crystal Oscillator) Performances

Content Provider	IEEE Xplore Digital Library
Author	Rohde, U.L. Poddar, A.K.
Copyright Year	2008
Description	Author affiliation: Synergy Microwave Corp., Paterson, NJ (Rohde, U.L.)
Abstract	Reference signal source requires highly quality factor resonating element, such as micro-machined or piezoelectric crystal that acts as an electro-mechanical resonating module in VCXO circuits. Apart from the apparent advantages of these electro-mechanical resonators they suffer from multi-mode resonance and cross talks. The selection of the desired resonance mode is challenging when the spacing between resonance modes is relatively small. This limits the fabrications of crystal oscillator as a reference sources in modern IC processes. The novel approach (mode-selection and mode-feedback techniques) reported in this paper optimizes the performance of VCXO, even those with relative low Q resonators, for low phase noise and good frequency stability. The typical measured phase noise for 155.6 MHz VCXO is typically -135 dBc/Hz at 100 Hz offset from the carrier, and to author knowledge, this is the best phase noise performance for this class of VCXO so far reported.
Starting Page	1
Ending Page	7
File Size	2221256
Page Count	7
File Format	PDF
ISBN	9781424418435
DOI	10.1109/SARNOF.2008.4520080
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2008-04-28
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Voltage-controlled oscillators Voltage control Resonance Phase noise Q factor Circuits Fabrication Frequency Stability Noise measurement VCXO Electro-Mechanical IC Q
Content Type	Text
Resource Type	Article

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