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:
Jul. 26, 2011
Filed:
Jul. 09, 2009
Applicant:
Bart Sorgeloos, Pittem, BE;
Inventor:
Bart Sorgeloos, Pittem, BE;
Assignee:
Sofics BVBA, Gistel, BE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02H 9/00 (2006.01); H01C 7/12 (2006.01); H02H 1/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
An ESD protection circuit including an SCR having at least a PNP transistor and at least a NPN transistor such that said PNP transistor is coupled to an anode and the NPN transistor is coupled to a cathode. The circuit also includes a first resistor coupled between the anode and the base of the pnp transistor and a second resistor coupled between the cathode and the base of the npn transistor. A parasitic distributed bipolar transistor is formed between said first and second transistor to control triggering of the SCR.