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. 14, 2006
Filed:
Feb. 08, 2001
Shi-tron Lin, Taipei, TW;
Wei-fan Chen, Taichung, TW;
Shi-Tron Lin, Taipei, TW;
Wei-Fan Chen, Taichung, TW;
Winbond Electronics Corp., Hsinchu, TW;
Abstract
An output buffer with a pull down circuit. The pull down circuit is coupled between a second power line and a pad, and has a resistor, a diode and an electrostatic discharge protection component. The resistor deposited on the substrate of a first conductivity type includes a well region of a second conductivity type. The resistor and the electrostatic discharge protection component are connected in series between the pad and the second power line. The diode is formed in the well region, construct by the PN junction formed between a first doped region of the first conductivity type and the well region. The first doped region is electrically floated in the well regions. During an electrostatic discharge event, the pad is instantaneously connected to the first doped region which will help to boost the turn-on of the electrostatic discharge circuit, and further enhance the electrostatic protection effect.