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:
Dec. 28, 2010
Filed:
Dec. 05, 2006
Masanori Tsuchihashi, Kyoto, JP;
Masanori Tsuchihashi, Kyoto, JP;
Rohm Co., Ltd., Kyoto, JP;
Abstract
A protection circuit according to the present invention includes: a diode (D) having an anode thereof connected to a gate signal input terminal and a cathode thereof connected to the gate of an output transistor (N); a resistor (R) having one end thereof connected to the gate signal input terminal and the other end thereof connected to ground; a PNP bipolar transistor (Qp) having the emitter, base and collector thereof connected to the gate of the output transistor (N), the one end of the resistor (R) 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.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile