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:
May. 18, 2010
Filed:
Dec. 01, 2006
Chun-hsiang Lai, Taichung, TW;
Chun-Hsiang Lai, Taichung, TW;
Macronix International Co., Ltd., Hsinchu, TW;
Abstract
An ESD protection circuit connected between an input pad and an internal circuit is disclosed. The ESD protection circuit includes a main ESD protection device, a first resistor and a secondary device. The main ESD protection device is connected to the input pad for clamping a voltage of the input pad. The first resistor has a first end connected to the input pad and a second end connected to the internal circuit. The secondary device is connected to the second end of the first resistor and the main ESD protection device for clamping a voltage of the internal circuit. During an ESD event, the secondary device is turned on first to receive an ESD current and accordingly provides a trigger current to turn on the main ESD protection device.