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. 16, 2025
Filed:
Apr. 14, 2022
Vanguard International Semiconductor Corporation, Hsinchu, TW;
Shao-Chang Huang, Hsinchu, TW;
Kai-Chieh Hsu, Taoyuan, TW;
Chi-Hung Lo, Zhudong Township, TW;
Wei-Sung Chen, Zhubei, TW;
Chieh-Yao Chuang, Kaohsiung, TW;
Hsien-Feng Liao, Taichung, TW;
Yeh-Ning Jou, Hsinchu, TW;
VANGUARD INTERNATIONAL SEMICONDUCTOR CORPORATION, Hsinchu, TW;
Abstract
An ESD protection circuit includes a buffer circuit, a driving circuit, and a power-clamping circuit. The buffer circuit includes first and second transistors having a first conductivity type coupled in a cascade configuration between a first node and a first power supply node. A bonding pad is coupled to the first node. The drive circuit determines a state of at least one of the first and second transistors according to a control voltage. The drive circuit includes a third transistor having a second conductivity type, which is coupled between a second power supply node and a gate of the first transistor and is controlled by the control signal. The power-clamping circuit is coupled to the bonding pad and a gate of the third transistor at a second node. The control voltage is generated at the second node and determined by a voltage at the bonding pad.