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:
Jun. 11, 2013
Filed:
Sep. 13, 2010
Eric Modica, San Jose, CA (US);
Edward J. Coyne, Limerick, IE;
Derek F. Bowers, Los Altos Hills, CA (US);
Eric Modica, San Jose, CA (US);
Edward J. Coyne, Limerick, IE;
Derek F. Bowers, Los Altos Hills, CA (US);
Analog Devices, Inc., Norwood, MA (US);
Abstract
Apparatus and methods are disclosed, such as those involving a junction field effect transistor for voltage protection. One such apparatus includes a protection circuit including an input, an output, and a JFET. The JFET has a source electrically coupled to the input, and a drain electrically coupled to the output, wherein the JFET has a pinch-off voltage (Vp) of greater than 2 V in magnitude. The apparatus further includes an internal circuit having an input configured to receive a signal from the output of the protection circuit. The protection circuit provides protection over the internal circuit from overvoltage and/or undervoltage conditions while having a reduced size compared to a JFET having a Vp of smaller than 2 V in magnitude.