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:
Jun. 13, 2000
Filed:
Jan. 06, 1998
Applicant:
Inventor:
Osamu Mizuhara, Allentown, PA (US);
Assignee:
Lucent Technologies, Inc., Murray Hill, NJ (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04L / ;
U.S. Cl.
CPC ...
375316 ; 375355 ; 375359 ;
Abstract
In an ultra high speed optical communications system, the clock signal from a data stream in NRZ format is recovered using an inexpensive, low Q filter. Resulting clock jitter is reduced with a clock divider which lowers the speed of the signal by 1/n, where n is a an integer. The divided clock signal is filtered again by a low frequency high Q filter. This invention eliminates the need for a costly high frequency high Q filter, while providing a divided down clock for data de-multiplexing. At the lower speed, an inexpensive D flip flop is used with the divided down clock for data recovery.