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:
May. 17, 2011
Filed:
Feb. 10, 2009
Paul F. Illegems, Tucson, AZ (US);
Paul F. Illegems, Tucson, AZ (US);
Standard Microsystems Corporation, Hauppauge, NY (US);
Abstract
An improved current source may provide an improvement over a typical ΔV-type current source. The improved current source may comprise two branches. A first branch may be configured to generate a PTC (proportional to absolute temperature) current based on a ΔVdeveloped across a resistor. A second branch may be configured to generate an NTC (inversely proportional to absolute temperature) current. The PTC current and NTC current may be combined to obtain a third current having a magnitude that is the sum of the respective magnitudes of the PTC current and the NTC current, and a temperature coefficient that is a combination of the respective temperature coefficients of the PTC current and NTC current. The current source may be configured to generate the NTC current and PTC current to be substantially insensitive to variations in the supply voltage.