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, 2024
Filed:
Feb. 17, 2022
Tamura Corporation, Tokyo, JP;
TAMURA CORPORATION, Tokyo, JP;
Abstract
A drive circuit is provided. When the switching element is in turn-on state and a collector-emitter voltage of the switching element is equal to or higher than a first predetermined voltage value, the first diode is turned on; the first transistor and the second transistor are turned on; and, after a mask time in which a first capacitor is started to be charged with a current from a current source and a voltage value at two ends becomes equal to or higher than a second predetermined voltage value higher than the first predetermined voltage value, an abnormality detection signal is output to the control unit. The control unit stops an output of the pulse signal to the switching element in response to the abnormality detection signal.