System and method for characterizing a load at the end of a cable
US7550980B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 1, 2007 |
| Grant date | Jun 23, 2009 |
| Priority date | — |
| Expiry date | Jan 22, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L12/10
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Apparatus within power sourcing equipment and a method for determining whether a load within a powered device coupled to the power sourcing equipment via a cable is within an acceptable resistance range. If the load is within the acceptable resistance range, a voltage source is coupled to the load. In one embodiment one recharge interval is employed during which a capacitor is charged based, at least in part, on the voltage drop across the load and one discharge interval is employed during which a capacitor is discharged based, at least in part, on the voltage drop across the load. In a second embodiment, first and second recharge and discharge intervals are employed and prior to initiation of the recharge and discharge intervals, settling time periods are provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.