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.:

US 6639772 B1

PDF
Full Text
Expired
Date of Patent:
Oct. 28, 2003

Filed:

Jan. 07, 2002
Applicant:
Inventors:

Chien-Hui Chuang, Taipei Hsien, TW;

Kei-Kang Hung, Changhua Hsien, TW;

Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02H 3/00 ;
U.S. Cl.
CPC ...
H02H 3/00 ;
Abstract

An electrostatic discharge (ESD) protection circuit for protecting input and output buffers. The ESD protection circuit is driven by a first voltage source and a second voltage source and coupled to a bonding pad. The ESD protection circuit has a first resistor, a first PMOS transistor, a first NMOS transistor, a first diode series, a second PMOS transistor, a second resistor, a third PMOS transistor, a second NMOS transistor, a second diode series and a third NMOS transistor. The electrical devices combine to form different types of ESD protection circuits, each capable of protecting the input buffer or output buffer against the damaging effects of an electrostatic discharge.


Find Patent Forward Citations

Chuang, Chien-Hui. (2003). Electrostatic discharge protection circuit for protecting input and output buffer (U.S. Patent No. 6639772). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/6639772

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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