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:
Jun. 30, 2015
Filed:
Sep. 16, 2011
Applicant:
Jeong Hwan Yang, Busan, KR;
Inventor:
Jeong Hwan Yang, Busan, KR;
Assignee:
SK INNOVATION CO., LTD., , KR;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01R 27/14 (2006.01); G01R 27/02 (2006.01); B60L 3/00 (2006.01); G01R 31/02 (2006.01);
U.S. Cl.
CPC ...
G01R 27/14 (2013.01); B60L 3/0069 (2013.01); G01R 27/025 (2013.01); G01R 31/025 (2013.01);
Abstract
An insulation resistance measurement circuit in which switching of first and second switches is controlled such that a leakage current may not be generated in measuring insulation resistance, and voltages output through first and second operational amplifiers are measured after opening the first and second switches and closing third and fourth switches for self-testing of the insulation resistance measurement circuit.