| US 7,593,756 B2 | ||
| Detection for high powered devices | ||
| Alon Ferentz, Bat Yam (Israel); and Roni Blaut, Netanya (Israel) | ||
| Assigned to Microsemi Corp.—Analog Mixed Signal Group Ltd., Hod Hasharon (Israel) | ||
| Filed on Mar. 27, 2006, as Appl. No. 11/277,539. | ||
| Application 11/277539 is a continuation in part of application No. 11/053872, filed on Feb. 10, 2005. | ||
| Application 11/053872 is a continuation in part of application No. 11/036063, filed on Jan. 18, 2005, granted, now 7,299,368. | ||
| Application 11/036063 is a continuation in part of application No. 10/761327, filed on Jan. 22, 2004. | ||
| Claims priority of provisional application 60/512362, filed on Oct. 16, 2003. | ||
| Claims priority of provisional application 60/608874, filed on Sep. 13, 2004. | ||
| Prior Publication US 2006/0171399 A1, Aug. 03, 2006 | ||
| Int. Cl. H04B 1/38 (2006.01); H04M 1/00 (2006.01); H02J 1/10 (2006.01); G06F 1/00 (2006.01) | ||
| U.S. Cl. 455—572 [455/343.1; 455/127.1; 455/423; 455/67.11; 307/43; 307/17; 307/18; 307/12; 713/300; 713/320; 713/340] | 25 Claims |
| 1. A local area network adapted to supply power to a plurality of types of powered devices over communication cabling, the
local area network comprising:
a powered device comprising at least one signature impedance;
a first powering source exhibiting a power output and a return;
a second powering source exhibiting a power output and a return, said second powering source different from said first powering
source; and
communication cabling comprising a plurality of twisted wire pairs arranged to connect said first and second powering source
to said powered device, said communication cabling providing a first power path coupling said power output and said return
of said first powering source to said powered device, said first power path comprising a first set of twisted wire pairs of
said communication cabling and a second power path coupling said power output and said return of said second powering source
to said powered device, said second power path comprising a second set of twisted wire pairs of said communication cabling
between said second powering source and said powered device, said first set being different from said second set,
said first powering source operative to:
apply a plurality of detection voltages to said powered device via said first path so as to attempt to detect a first one
of said at least one signature impedance, and
in the event said first one of said at least one signature impedance is detected, to at least partially classify the power
requirements of said powered device by supplying a classification voltage to said powered device via said first path and measuring
the resultant current flow, said classification voltage level being higher than each of the plurality of detection voltages;
said second powering source operative to apply a detection voltage to said powered device via said second path so as to attempt
to detect a second one of said at least one signature impedance at least partially contemporaneously with said supplied classification
voltage of said first powering source.
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