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:
Apr. 13, 1999
Filed:
Jun. 11, 1997
Applicant:
Inventors:
Akira Baba, Shizuoka, JP;
Hiroo Yabe, Shizuoka, JP;
Assignee:
Yazaki Corporation, Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02H / ;
U.S. Cl.
CPC ...
361 87 ; 361 93 ; 361100 ; 361115 ;
Abstract
First threshold corresponding to a large electric current capable of breaking a MOS-FET even if the electric current flows even in a short period is provided for a difference amplifying circuit and second threshold lower than the first threshold is stored in a memory. If a detected electric current value is higher than the first threshold or if a CPU determines that an electric current higher than the second threshold has flowed continuously for a period longer than a predetermined period, the semiconductor switch is switched off.