Electricity: electrical systems and devices – Safety and protection of systems and devices – With specific current responsive fault sensor
Reexamination Certificate
2011-04-26
2011-04-26
Patel, Dharti H (Department: 2836)
Electricity: electrical systems and devices
Safety and protection of systems and devices
With specific current responsive fault sensor
C361S093200, C361S093700, C361S093900, C361S079000
Reexamination Certificate
active
07933105
ABSTRACT:
A switching element driving device has a first transistor that decreases the gate voltage of a power element at a faster rate than during a normal turn-off, and a second transistor that decreases the gate voltage of the power element at a slower rate than during a normal turn-off. If the gate voltage detected by the gate voltage monitoring means when an overcurrent in the power element is detected by overcurrent detection means is greater than a predetermined value, the gate voltage is decreased by the first transistor, and then, while the power element remains on, the gate voltage is decreased by the second transistor. If the gate voltage detected by the gate voltage monitoring means when an overcurrent in the power element is detected by overcurrent detection means is less than or equal to the predetermined value, the gate voltage is decreased only by the second transistor.
REFERENCES:
patent: 6057728 (2000-05-01), Igarashi
patent: 2002/0070772 (2002-06-01), Neacsu et al.
patent: 0 817 381 (1998-01-01), None
patent: A-4-172962 (1992-06-01), None
patent: A-10-070878 (1998-03-01), None
patent: A-11-112313 (1999-04-01), None
patent: A-2000-295838 (2000-10-01), None
patent: A-2002-369495 (2002-12-01), None
patent: A-2003-134797 (2003-05-01), None
patent: A-2003-248318 (2003-10-01), None
patent: A-2005-006381 (2005-01-01), None
patent: B-3649154 (2005-02-01), None
patent: A-2006-109286 (2006-04-01), None
Masahiro Kimata, Semiconductor device drive circuit, Publication Date: Jul. 1, 1998, Drawing 14, col. 23 and col. 24.
G. Castino, et al.: International Rectifier Corporation, Application Notes AN-984J, circa 1990.
Kosugi Hajime
Yamawaki Hideo
Kenyon & Kenyon LLP
Patel Dharti H
Toyota Jidosha & Kabushiki Kaisha
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