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:
Sep. 14, 2004
Filed:
Aug. 12, 2002
Applicant:
Inventors:
Krishna Shenai, Naperville, IL (US);
Erik A. McShane, Lockport, IL (US);
Assignee:
Shakti Systems, Inc., Lisle, IL (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01R 2/728 ; H01H 3/102 ;
U.S. Cl.
CPC ...
G01R 2/728 ; H01H 3/102 ;
Abstract
A system and method for detecting, measuring, and reporting a time derivate of a current signal (di/dt). A sensing element detects current from a load. The sensing element includes an inductor. The inductor is located in series with the load and includes associated parasitic resistance. A differential potential develops across the inductor and the parasitic resistance. The differential potential is amplified and converted to a single-ended value. The single-ended value is then fed to an analog to digital converter that provides an output representative of di/dt.