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, 1999
Filed:
Jan. 23, 1998
Applicant:
Inventor:
Niels LaWhite, Somerville, MA (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01R / ;
U.S. Cl.
CPC ...
324 7642 ; 324 7644 ; 324 7646 ;
Abstract
A system for determining the fundamental frequency of a digitized AC signal is disclosed. Each signal zero crossing is detected, and in response to each zero crossing, two discrete impulses are generated. In response to the train of generated impulses, the system determines the fundamental frequency of the AC signal.