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. 04, 1997
Filed:
Mar. 18, 1996
Makoto Kadowaki, Tokyo, JP;
Kunimitsu Kurita, Shizuoka, JP;
NEC Corporation, Tokyo, JP;
Abstract
In receiving an optical digital burst signal in an optical communication system, an optical digital burst signal is converted into an electric digital burst signal. A threshold level is determined from the electric digital burst signal. Based on a threshold signal having the determined threshold level whether each of bits of the electric digital burst signal is in a high level or a low level is identified by an identifying circuit. When a sync pattern is detected from the electric digital burst signal, a hunting signal is generated by a synchronization detecting circuit. The duration time of the threshold signal is selected as one of short and long duration times based on whether the hunting signal is significant or insignificant.