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. 22, 2014
Filed:
Dec. 13, 2011
Yoshiyuki Hamanaka, Kariya, JP;
Tsuneo Maebara, Nagoya, JP;
Junichi Nagata, Okazaki, JP;
Tomoyuki Muraho, Nagoya, JP;
Akito Itou, Kariya, JP;
Yoshiyuki Hamanaka, Kariya, JP;
Tsuneo Maebara, Nagoya, JP;
Junichi Nagata, Okazaki, JP;
Tomoyuki Muraho, Nagoya, JP;
Akito Itou, Kariya, JP;
Denso Corporation, Kariya, JP;
Abstract
A drive circuit supplies a charging current via a charging path to drive the control terminal of a voltage-controlled switching device, with a resistor and a switching device being connected in series in the charging path. A control circuit in an integrated circuit of the drive circuit operates an internal switching device such as to selectively enable/interrupt the charging current and to regulate the voltage drop across the resistor to a fixed value. The switching device connected in the charging path can be readily changed from the internal switching device to an external switching device, in accordance with the operating requirements of the driven switching device.