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:
Apr. 25, 2000
Filed:
Jul. 01, 1997
Applicant:
Inventors:
Bin Wu, San Jose, CA (US);
Richard C Walker, Palo Alto, CA (US);
Assignee:
Hewlett-Packard Company, Palo Alto, CA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03D / ;
U.S. Cl.
CPC ...
375375 ; 375374 ; 375376 ; 331 / ; 331 25 ;
Abstract
This invention provides a simple yet robust solution to the phase-locked loop frequency acquisition problem in clock and data recovery circuits by using a frequency detector with a deadband, which is constructed in part with an oversampling rotational frequency detector.