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:
Oct. 16, 2012
Filed:
Sep. 30, 2009
Rami Labib, Ottawa, CA;
Marcos Vivas, Kanata, CA;
Rami Labib, Ottawa, CA;
Marcos Vivas, Kanata, CA;
Alcatel Lucent, Paris, FR;
Abstract
A method and an apparatus to measure current in power switching supplies are disclosed for simplification of in-circuit measurement. The method and apparatus to measure current include a sensing capacitor, which in series with a resistor, is placed across the output inductor of the power supply in order to utilize the parasitic resistance of the inductor, in conjunction with a measurement controller which performs initial calibration and temperature compensation. Initial and secondary measurements are performed using an adjustable current sink in order to eliminate thermal effects. The method and apparatus to measure current in power switching supplies are particularly useful for overcoming invasive measurement techniques for measuring current known in the art.