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:
Mar. 19, 2019
Filed:
Mar. 01, 2017
Kabushiki Kaisha Toshiba, Tokyo, JP;
Naoki Wakita, Kawasaki Kanagawa, JP;
Kabushiki Kaisha Toshiba, Tokyo, JP;
Abstract
An ESD protection circuit has a diode that includes an anode connected to a first power-supply line and a cathode connected to a second power-supply line. A metal-oxide-semiconductor (MOS) transistor is connected in series with the diode. A trigger circuit is configured to output a trigger signal to a gate of the MOS transistor in synchronization with a surge on the first power-supply line. A first resistor and a first capacitor are connected in series between the first power-supply line and the second power-supply line. A well region, in which the source and the drain of the MOS transistor are disposed, is connected to a connection point between the first resistor and the first capacitor. A potential of the connection point varies so that a forward voltage is applied to a p-n junction between the well region and the source of the MOS transistor to correspond with the surge.