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:
Dec. 25, 2001
Filed:
May. 12, 2000
Applicant:
Inventors:
Assignee:
Nortel Networks Limited, Montreal, CA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03L 7/07 ;
U.S. Cl.
CPC ...
H03L 7/07 ;
Abstract
A method and apparatus for filtering phase noise or jitter from a reference signal that may be of any arbitrary rate. By using a synthesizer to convert a signal at the output of a low noise signal source to a signal with frequency similar to a high speed output rate with desired relationship to the reference signal, a limitation normally caused by the narrow tuning range of a VCXO (a typical low noise signal source) can be overcome. Conversely, the desired high speed output rate may be converted to one similar to the VCXO frequency.