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. 13, 2010
Filed:
Jul. 23, 2008
Tony S. El-kik, Allentown, PA (US);
Tony S. El-Kik, Allentown, PA (US);
Agere Systems Inc., Allentown, PA (US);
Abstract
Methods and apparatus are provided for digital phase detection with improved frequency locking. A phase detector is disclosed for evaluating a phase difference between a clock signal and a reference signal. The disclosed phase detector samples the clock signal and the reference signal on positive edges of one or more of the clock signal and the reference signal, samples the clock signal and the reference signal on negative edges of one or more of the clock signal and the reference signal, and generates one or more error signals indicating a phase difference between the clock signal and the reference signal. A clock signal that is phase aligned with a reference signal can be generated by generating an error signal indicating a phase difference between the clock signal and the reference signal and applying the error signal to an oscillator to produce the clock signal.