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:
Jan. 29, 2008
Filed:
Feb. 12, 2003
Applicant:
Richard Allen Harris, Kawana Downs, AU;
Inventor:
Richard Allen Harris, Kawana Downs, AU;
Assignee:
Fultec Pty Ltd, , AU;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02H 9/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A protection device is enclosed. The device has a first MOSFET (Q), a second MOSFET (Q) and a third JFET (Q) with their conductive paths in series with the JFET (Q) being located between the MOSFETS (QQ). The source of the first MOSFET (Q) is connected to the gate of the second MOSFET (Q) and the source of the second MOSFET (Q) is connected to the gate of the first MOSFET (Q). The MOSFETS (QQ) and JFET (Q) together form a variable resistance circuit block connectable between an input and an output The gate of the JFET (Q) being coupled to the input and the output by respective current sources.