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. 08, 2012
Filed:
Sep. 10, 2008
Gary J. Verdun, Georgetown, TX (US);
Gary J. Verdun, Georgetown, TX (US);
Dell Products L.P., Round Rock, TX (US);
Abstract
Accurate power usage for a portable information handling system is provided using input power measurement circuitry. A calibration step is performed when the portable information handling system is powered down and charging. The calibration step includes obtaining a battery charge measurement from a battery, and then using this measurement to calibrate an input power measurement made with respect to power being provided by the AC/DC adapter. Known losses from other sources within the system can also be considered in the auto-calibration of the input power measurement. Subsequently, when the portable information handling system is powered on and operating on power provided by the AC/DC adapter, power usage can be determined and reported using the auto-calibrated input power measurement as an indication of the power usage of the portable information handling system.