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. 22, 2016
Filed:
Oct. 09, 2015
Fuji Electric Co., Ltd., Kawasaki-shi, JP;
Hidetomo Ohashi, Matsumoto, JP;
Masashi Akahane, Matsumoto, JP;
FUJI ELECTRIC CO., LTD., Kawasaki-Shi, JP;
Abstract
Malfunction can be reliably avoided even when a signal that drives a high side power device is not normally transmitted in a level shift circuit. In a drive circuit, a pulse generator circuit generates a set signal and reset signal that causes a high side power device to be turned on or off. The pulse generator circuit provides set and reset signals, via a level shift circuit, to a high side drive circuit. A high side potential (a high side reference potential or a high side power supply potential) is detected by a high side potential detector circuit. A high side potential determination circuit determines a change in potential that impedes the transmission of the set signal or reset signal in the level shift circuit, and causes the pulse generator circuit to regenerate the set signal or reset signal when the timing of the detection coincides with the timing at which the set signal or reset signal is generated.