Calibration technique for power measurement and management over multiple time frames

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United States of America Patent

PATENT NO 7536577
APP PUB NO 20070294558A1
SERIAL NO

11843104

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Abstract

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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.

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Patent Owner(s)

Patent OwnerAddress
LENOVO INTERNATIONAL LIMITED23/F LINCOLN HOUSE TAIKOO PLACE 979 KING'S ROAD QUARRY BAY

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Desai, Dhruv Manmohandas Cary, US 14 392
Gruendler, Nickolas J Raleigh, US 12 186
Morrell, Carl A Cary, US 15 75
Scollard, Michael Leo Raleigh, US 6 88
Shippy, Gary R Cary, US 17 530
Steinmetz, Michael Joseph Cary, US 3 33
Ware, Malcolm Scott Austin , US 59 968
Wood, Christopher L Austin, US 27 159

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