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:
Jul. 06, 2010
Filed:
Sep. 28, 2007
Masazumi Marutani, Kawasaki, JP;
Masazumi Marutani, Kawasaki, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
A clock selection circuit and synthesizer that is capable of selecting an optimum clock signal from among a plurality of clock signals in a short time. A reference-clock counter counts clock pulses in an inputted reference clock signal (REF). A clock counter counts clock pulses in one of the plurality of clock signals which is selected by a selection unit and frequency-divided by a frequency divider. An instruction-signal output unit outputs a plurality of comparison-instruction signals during an interval in which a difference occurs between the counts of two of the plurality of clock signals having the closest frequencies. A comparison unit compares the count of the reference-clock counter and the count of the clock counter. The selection unit selects a clock signal by a binary search according to the result of the comparison.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile