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:
Aug. 17, 2004
Filed:
Oct. 08, 1999
Satoru Ishii, Mobara, JP;
Futaba Denshi Kogyo Kabushiki Kaisha, Mobara, JP;
Abstract
A symbol synchronous device is provided that can maintain symbol synchronization in short time in response to synchronous signals. The symbol synchronous device receives a synchronous signal at a signal point with a different phase degree, the synchronous signal in which the phase rotational direction is reversed to said carrier, and then produces a decision timing in synchronous with a symbol of said digital-modulated signal. The differential output unit and the decision unit detect the reverse timing based on the phase angle &dgr; of a digital-modulated signal with respect to the reference frequency signal. The phase angle is produced by the phase angle calculation unit . The XOR integration digital PLL produces clock signals in synchronous with the reverse timing to provide the decision timing.