The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 19, 2006
Filed:
Dec. 04, 2002
Takuya Ohara, Yokohama, JP;
Hidehiko Takara, Yokosuka, JP;
Satoki Kawanishi, Yokohama, JP;
Nippon Telegraph and Telephone Corporation, Tokyo, JP;
Abstract
This optical clock phase-locked loop circuit includes an oscillator, an optical coupler, an optical cross-correlation detection devicethat outputs light containing the correlating components of two lights from the coupled light of optical coupler, an optical band pass filterthat extracts light of a wavelength that contains cross-correlating components, an optical receiver, a phase comparatorthat compares the phases of the output signal of the oscillatorand the cross-correlation signal from the optical receiver, a voltage controlled oscillatorthat changes the oscillation frequency and phase corresponding to the output of the phase comparator, an optical pulse generatorthat generates a optical clock pulse containing an nth harmonic component, an optical couplerthat divides optical clock, and an optical modulatordriven by low-frequency oscillatorthat modulates optical clock from optical coupler
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile