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:
Oct. 18, 2011
Filed:
Jun. 23, 2009
Daiki Yanagishima, Kyoto, JP;
Toshiyuki Ishikawa, Kyoto, JP;
Daiki Yanagishima, Kyoto, JP;
Toshiyuki Ishikawa, Kyoto, JP;
Rohm Co., Ltd., Kyoto, JP;
Abstract
A power semiconductor drive circuit device includes: an electronic control device generating a control input signal; a signal transfer circuit device having a main path and a self-diagnosis functional block; and a power semiconductor driven by the control output signal from the signal transfer circuit device. The self-diagnosis functional block includes: a feedback pulse transmitter circuit; a second signal transfer circuit; and a second receiver circuit. The second receiver circuit compares the control output signal with the control input signal so as to find out whether the control output signal is matched or unmatched with the control input signal, and then outputs a result to a comparison signal output terminal. A signal outputted to the comparison signal output terminal is transferred to the electronic control device.