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. 19, 2009
Filed:
Aug. 22, 2007
Dhruv Manmohandas Desai, Cary, NC (US);
Nickolas J. Gruendler, Raleigh, NC (US);
Carl A. Morrell, Cary, NC (US);
Gary R. Shippy, Cary, NC (US);
Michael Leo Scollard, Raleigh, NC (US);
Michael Joseph Steinmetz, Cary, NC (US);
Malcolm Scott Ware, Austin, TX (US);
Christopher L. Wood, Austin, TX (US);
Dhruv Manmohandas Desai, Cary, NC (US);
Nickolas J. Gruendler, Raleigh, NC (US);
Carl A. Morrell, Cary, NC (US);
Gary R. Shippy, Cary, NC (US);
Michael Leo Scollard, Raleigh, NC (US);
Michael Joseph Steinmetz, Cary, NC (US);
Malcolm Scott Ware, Austin, TX (US);
Christopher L. Wood, Austin, TX (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A calibration technique provides for precision calibration of system power measurement. The calibration technique uses a precision reference resistor and voltage reference controlled current source to introduce a voltage drop from the input side of a power supply sense resistor. Calibration measurements are thereby made for voltages substantially equal to the voltage of the power supply output, so that differential measurements are made at substantially the same common-mode voltage by appropriate selection of the relationship of the resistance of the precision reference resistor and the resistance of the sense resistor, where the common-mode voltage of the measurement is substantially equal to the power supply output voltage.