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. 19, 2010
Filed:
Sep. 08, 2004
Rafael Castro, Round Rock, TX (US);
Rafael Castro, Round Rock, TX (US);
National Instruments Corporation, Austin, TX (US);
Abstract
A protection circuit for protecting a device from destructive electrical conditions, such as ESD, over-voltage, and over-current, while keeping the output impedance of the device's I/O lines to a minimum, and self-regulating power dissipation. The device may comprise a first protection circuit and a second protection circuit coupled to each of one or more I/O lines for providing a primary and a secondary level of protection, respectively, for the I/O lines. The first protection circuit of the device may combine the use of Schottky diodes for voltage clamping, with a current limiting device for self-regulating the power dissipation. The current limiting device may be operable to function as a small, low impedance resistor in a normal operating range and as a controlled power dissipater outside the normal operating range. The device may be a data acquisition device comprised in a data acquisition system.