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:
Sep. 09, 2008
Filed:
Jun. 09, 2004
Kazuhisa Suzuki, Hamura, JP;
Kazuhisa Suzuki, Hamura, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
An error rate of a bit synchronous circuit is decreased to a large extent by preventing following excessively the jitters included in input data. A phase detect circuit of a bit synchronous circuit includes a majority decision circuit. The majority decision circuit counts UP0 and DN0 signals as a phase comparison result of comparing phases by a UP0 counter and a DN0 counter for a period of time, and its count number is judged by a magnitude relation determination circuit. The magnitude relation determination circuit outputs an UP signal if the UP0 signal is majority, a DN signal if the DN0 signal is majority, and a FIX signal if the UP0 signal is equal to the DN0 signal. Accordingly, since it is possible to prevent following the jitters included in input data, etc., an error rate for bit synchronization can be reduced to a large extent.