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:
Nov. 13, 2001
Filed:
Dec. 21, 1999
Applicant:
Inventor:
Daniel V. Camin, Milan, IT;
Assignee:
Istito Nazionale di Fisica Nucleare, Frascati, IT;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01R 3/100 ;
U.S. Cl.
CPC ...
G01R 3/100 ;
Abstract
There is described a direct current meter with passive input and galvanic insulation, particularly for high voltage. The direct current meter is made up of a passive input part and of an active output part that is optically coupled to the passive part and electrically insulated from it. In this way the high voltage present at the input only affects the passive part of the meter, whereas the active part can be supplied with a low voltage and can be made capable to provide an output signal proportional to the current to be measured and substantially independent from the working temperature.