Determination of effective resistance between a power sourcing equipment and a powered device
US7417443B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 7, 2007 |
| Grant date | Aug 26, 2008 |
| Priority date | — |
| Expiry date | Apr 3, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F1/26
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method of determining an effective resistance between a power sourcing equipment and a powered device, the powered device exhibiting an interface and an operational circuitry, the method comprising: prior to connecting power to the operational circuitry of the powered device, impressing two disparate current flow levels (I1, I2) between the power sourcing equipment and the powered device; measuring the voltage at the powered device interface (VPD1, VPD2) responsive to each of the impressed disparate current levels; measuring the voltage at the power sourcing equipment (VPSE1, VPSE2) responsive to each of the impressed disparate current levels; and determining the effective resistance between the power sourcing equipment and the powered device responsive to the VPD1, VPD2, VPSE1, VPSE2, I1 and 12.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.