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. 02, 2008
Filed:
Jan. 12, 2006
Shao-chang Huang, Hsinchu, TW;
Jian-hsing Lee, Hsinchu, TW;
Yi-hsun Wu, HsinChu, TW;
Jiaw-ren Shih, Tsing-chu, TW;
Shao-Chang Huang, Hsinchu, TW;
Jian-Hsing Lee, Hsinchu, TW;
Yi-Hsun Wu, HsinChu, TW;
Jiaw-Ren Shih, Tsing-chu, TW;
Taiwan Semiconductor Manufacturing Co., Ltd., Hsin-Chu, TW;
Abstract
A circuit system is disclosed for protecting a capacitor coupled between a voltage supply node and a complementary voltage supply node from an ESD. The circuit system includes at least one NMOS transistor having a drain coupled to the voltage supply node, a source and a gate together coupled to the complementary voltage supply node, and at least one diode chain having one or more diodes serially coupled between the voltage supply node and the complementary voltage supply node. During an ESD event, the diode chain and the NMOS transistor dissipate an ESD current from the voltage supply node to the complementary voltage supply node, thereby protecting the capacitor from ESD induced damages.