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:
Aug. 03, 2004
Filed:
Sep. 20, 2000
Brian Lee Abernathy, Poway, CA (US);
Applied Micro Circuits Corporation, San Diego, CA (US);
Abstract
A digital phase detector in accordance with the present invention is capable of stable high speed operation. The phase detector operates in a half-rate manner, i.e., the digital clock frequency is one-half the digital data rate. A phase adjustment signal is generated with digital logic elements in a manner that reduces the timing requirements of the digital devices. The phase adjustment signal contains phase reference pulses having pulsewidths that are greater than or equal to the pulsewidth associated with the digital clock signal. The use of relatively wide phase reference pulses reduces the likelihood of instability and erroneous detection due to circuit speed limitations, thus resulting in an overall increase in detector performance.