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:
Feb. 01, 2005
Filed:
Dec. 06, 2000
Applicants:
Kazuhisa Kogure, Kawasaki, JP;
Hiroshi Yamada, Kawasaki, JP;
Atsushi Suda, Yokohama, JP;
Inventors:
Assignee:
Fujitsu Limited, Kawasaki, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03D 324 ;
U.S. Cl.
CPC ...
Abstract
A clock regeneration circuit having a PLL circuit which includes a voltage control oscillator; a clock extraction circuit which includes a band passing filter and a harmonic component of a dividing signal of the oscillation frequency signal; a frequency detector; a filter; a bit rate detection circuit; and a frequency selection circuit outputting an oscillation frequency of the voltage control oscillator of the PLL circuit or a frequency signal obtained by dividing the oscillation frequency in response to the bit rate detected by the bit rate detection circuit, as a regeneration clock circuit.