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:
May. 14, 2013
Filed:
Feb. 24, 2011
Takeyoshi Hisada, Hekinan, JP;
Nobutomo Takagi, Okazaki, JP;
Shigekazu Sugimoto, Takahama, JP;
Fukuo Ishikawa, Kariya, JP;
Takeyoshi Hisada, Hekinan, JP;
Nobutomo Takagi, Okazaki, JP;
Shigekazu Sugimoto, Takahama, JP;
Fukuo Ishikawa, Kariya, JP;
Anden Co., Ltd., Anjo, JP;
Abstract
An overcurrent protection circuit includes a load driver for driving a load, a controller for turning ON and OFF the load driver, a current sensor for measuring a load current flowing through the load, and an add/subtract circuit for performing both an addition operation and a subtraction operation on a previous calculation result or for performing only the subtraction operation on the previous calculation result so as to produce a present calculation result. The addition operation uses an added value depending on the presently measured current. The subtraction operation uses a subtracted value depending on the presently measured current. The controller turns OFF the load driver, when the present calculation result of the add/subtract circuit exceeds a predetermined determination value.