Calibration technique for power measurement and management over multiple time frames
US7536577B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 22, 2007 |
| Grant date | May 19, 2009 |
| Priority date | — |
| Expiry date | Aug 22, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F1/3203
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.