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:
Mar. 02, 2004
Filed:
May. 30, 2000
James D. Chlipala, Emmaus, PA (US);
John M. Khoury, Basking Ridge, NJ (US);
Kadaba R. Lakshmikumar, Basking Ridge, NJ (US);
Peter C. Metz, Macungie, PA (US);
Agere Systems Inc., Allentown, PA (US);
Abstract
A method and apparatus for detecting the phase difference between an input data signal and a local clock signal is provided. An input data signal is frequency divided and then fed through a series connection of a pair of data latches. Signals provided at the input and outputs of the pair of the data latches are exclusively-ORed to provide a variable width pulse signal and a reference pulse signal that may be used in a phase-locked loop to align the local clock with the input data signal in a predetermined phase relationship. A re-timed data signal is provided by inputting the input data signal to a data latch clocked with an inverted phase-aligned clock signal.