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:
Sep. 05, 2006
Filed:
Jan. 31, 2003
Yasuhiro Fukuda, Tokyo, JP;
Yasuhiro Fukuda, Tokyo, JP;
Oki Electric Industry Co., Ltd., Tokyo, JP;
Abstract
An electrostatic breakdown preventing circuit has first and second conductive lines, a diode, a power clamp circuit and first and second capacitors. The first and second conductive lines are connected to a first potential source and a second potential source, respectively. The internal circuit is connected between the first and second conductive lines. The internal circuit operates in response to an input signal. The diode is connected in a forward direction between an input terminal and the second conductive line. The first capacitor is connected between the node and the first conductive line. The second capacitor is connected between the node and the second power conductive line. The capacitances of the first and second capacitors are set in such a manner that the transistor is brought to an OFF state upon a normal operation and brought to an ON state upon the input of an electrostatic surge.