Electricity: electrical systems and devices – Safety and protection of systems and devices – Load shunting by fault responsive means
Reexamination Certificate
2006-12-05
2010-12-28
Fureman, Jared J (Department: 2836)
Electricity: electrical systems and devices
Safety and protection of systems and devices
Load shunting by fault responsive means
Reexamination Certificate
active
07859805
ABSTRACT:
A protection circuit according to the present invention includes: a diode (D1) having an anode thereof connected to a gate signal input terminal and a cathode thereof connected to the gate of an output transistor (N1); a resistor (R1) having one end thereof connected to the gate signal input terminal and the other end thereof connected to ground; a PNP bipolar transistor (Qp1) having the emitter, base and collector thereof connected to the gate of the output transistor (N1), the one end of the resistor (R1) and ground, respectively. With this configuration, it is possible to prevent, without the need for electric power, an open-drain output transistor from erroneously turning on as a result of an electrostatic pulse or the like being applied thereto, and thus to protect the output transistor from electrostatic breakdown.
REFERENCES:
patent: 4418291 (1983-11-01), Watson, Jr.
patent: 5644460 (1997-07-01), Clukey
patent: 5946177 (1999-08-01), Miller et al.
patent: 6101077 (2000-08-01), Matsumoto et al.
patent: 6147538 (2000-11-01), Andresen et al.
patent: 6229182 (2001-05-01), Van Lieverloo
patent: 6954098 (2005-10-01), Hsu et al.
patent: 2001/0053054 (2001-12-01), Andoh
patent: 2002/0027755 (2002-03-01), Andresen et al.
patent: 2003/0197543 (2003-10-01), Imai
patent: 2005/0045955 (2005-03-01), Kim et al.
patent: 2005/0200396 (2005-09-01), Hsu et al.
patent: 2005/0231866 (2005-10-01), Mergens et al.
patent: 02-274124 (1990-11-01), None
patent: 05-327456 (1993-12-01), None
patent: 10-224201 (1998-08-01), None
patent: 11-054711 (1999-02-01), None
patent: 2003-316455 (2003-11-01), None
patent: 429588 (2001-04-01), None
patent: 520563 (2003-02-01), None
patent: 1220312 (2004-08-01), None
patent: 1240406 (2005-09-01), None
patent: 1241010 (2005-10-01), None
Brooks Angela
Fish & Richardson P.C.
Fureman Jared J
Rohm & Co., Ltd.
LandOfFree
Electrostatic breakdown protection circuit and semiconductor... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Electrostatic breakdown protection circuit and semiconductor..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Electrostatic breakdown protection circuit and semiconductor... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4238355