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.

Date of Patent:
Mar. 11, 2014

Filed:

Aug. 05, 2011
Applicant:

Yoshinari Tsukada, Tochigi, JP;

Inventor:

Yoshinari Tsukada, Tochigi, JP;

Assignee:
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03B 1/00 (2006.01); H03K 3/00 (2006.01);
U.S. Cl.
CPC ...
Abstract

A semiconductor device () having a switching function of being turned on or off according to a voltage (Vge) of a driving signal supplied to a gate thereof is driven by generating a feedback voltage (V) based on a time change (dI/dt) of a collector current (Ic) of the semiconductor device () and applying the feedback voltage (V) as part of the voltage (Vge) of the driving signal when the semiconductor device () is switched from on to off.


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