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:
Jul. 04, 2006
Filed:
Sep. 29, 2003
Nobutaka Kitagawa, Machida, JP;
Nobutaka Kitagawa, Machida, JP;
Kabushiki Kaisha Toshiba, Tokyo, JP;
Abstract
An electrostatic discharge protection circuit device is disclosed, which comprises a first electrostatic discharge protection circuit connected between a first external terminal and a first ground terminal, a second electrostatic discharge protection circuit connected between a second external terminal and a second ground terminal, the second electrostatic discharge protection circuit having substantially the same configuration as that of the first electrostatic discharge protection circuit, a trigger signal line which connects to each other output nodes of surge detection circuits of the first and second electrostatic discharge protection circuits, and transfers a surge detection output of the first or second electrostatic discharge protection circuit to the other electrostatic discharge protection circuit as a trigger signal, and a common discharge line connected directly to the first ground terminal, connected to the second ground terminal via a parallel circuit composed of a forward-connected parasitic diode element and a reverse-connected parasitic diode element.