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:
Jul. 15, 2008
Filed:
Sep. 30, 2005
Peter C. Metz, Macungie, PA (US);
Gregory W. Sheets, Bangor, PA (US);
Peter C. Metz, Macungie, PA (US);
Gregory W. Sheets, Bangor, PA (US);
Agere Systems Inc., Allentown, PA (US);
Abstract
Methods and apparatus are provided for delay line control using receive data. A delay in a Delay-Locked-Loop circuit is controlled by obtaining a plurality of samples of one or more received signals for each unit interval; determining a data eye width in the one or more received signals; and adjusting a delay of at least one clock signal based on the data eye width. For example, the measured data eye width can be compared to a predefined value, such as a desired or ideal value. Generally, the delay is not adjusted in accordance with the present invention until the Delay-Locked-Loop circuit has reached a locked condition based on one or more predefined criteria.