Electricity: measuring and testing – Impedance – admittance or other quantities representative of... – Lumped type parameters
Reexamination Certificate
2007-08-01
2009-06-23
Gutierrez, Diego (Department: 2831)
Electricity: measuring and testing
Impedance, admittance or other quantities representative of...
Lumped type parameters
C324S691000, C361S091200
Reexamination Certificate
active
07550980
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.
REFERENCES:
patent: 5844759 (1998-12-01), Hirsh et al.
patent: 6753687 (2004-06-01), Nitta et al.
patent: 2006/0017444 (2006-01-01), Fechalos et al.
patent: 2008/0049367 (2008-02-01), Carson et al.
patent: 2008/0291039 (2008-11-01), Picard
Silicon Laboratories, Inc., Si3400/01 Power Over Ethernet PD Controllers, 2007.
National Semiconductor Corporation, LM5071—Power Over Ethernet PD Controller With Auxiliary Power Interface, 2007.
EeProductCenter, Power-Over-Ethernet Controller Extends the IEEE Spec, Apr. 10, 2007.
ThomasNet Industrial NewsRoom, News Story—PoE Controller Suits High Powered Device Applications, Apr. 11, 2007.
National Semiconductor Corporation, Introduces Industry's First Single-Chip, Power Over Ethernet Device Controller Designed for Low-Voltage Auxillary Power Sources, Jan. 16, 2006.
Embedded Star (Online Destiny Ltd.), TI Introduces New Controller IC and Plug-In Power Module, May 18, 2004.
Texas Instruments Incorporated; IEEE 802.3af Power Interface Switch for Power Over Ethernet (PoE) Powered Devices, Aug. 2002—revised Mar. 2004.
Texas Instruments Incorporated, Reference Design, TPS23750 High Efficiency 5V at 2.2A PoE PD, SLVU159—Feb. 2007.
Power Electronics Technology, David Morrison, Power Over Ethernet Nurtures a New Class of Controller Chips, May 1, 2004.
Miller Wilburn M.
Neidorff Robert A.
Picard Jean
Serrano Guillermo J.
Wang Lin
Brady III Wade J.
Gutierrez Diego
Natalini Jeff
Patti John J.
Telecky , Jr. Frederick J.
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