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. 06, 1999
Filed:
Nov. 05, 1997
Applicant:
Inventor:
Maya Suresh, Santa Clara, CA (US);
Assignee:
Hewlett Packard Company, Palo Alto, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03L / ;
U.S. Cl.
CPC ...
327-3 ; 327-2 ; 327-8 ; 331 25 ;
Abstract
An asynchronous digital phase detector. The digital phase detector includes an asynchronous state machine which simulates an edge triggered J-K flip flop. Additionally, the digital phase detector includes a reset line. The asynchronous state machine is implemented with logic which provides for optimal phase detector sensitivity and minimal dead zone. The logic within the digital phase detector is implemented with pass-transistors. The channel widths of the pass-transistors are selectively widened or narrowed to further increase the sensitivity of the phase detector.