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. 22, 2007
Filed:
Sep. 17, 2004
P. E. Ramesh, Bangalore, IN;
Godfree Coelho, Bangalore, IN;
P. E. Ramesh, Bangalore, IN;
Godfree Coelho, Bangalore, IN;
Tektronix, Inc., Beaverton, OR (US);
Abstract
An oscilloscope performs an in-circuit measurement of voltage across, and current through, a core winding of an inductor, and derives the actual B and H values with n number of turns, receives data indicative of the magnetic length of the circuit, and plots the B_H curve. The oscilloscope then derives the value of Saturation flux density (Bsat), Remnant flux density (Br), Permeability (μ), and Coercivity (Hc) from this B-H plot. Characterizing the operating region of the magnetic component while it operates in a Switch Mode Power Supply (SMPS) under test, provides information concerning the stability of the power supply that was heretofore unavailable.