Electrical transmission or interconnection systems – Superimposed unlike currents – Ac and dc sources
Reexamination Certificate
2010-07-06
2011-10-04
Fleming, Fritz M (Department: 2836)
Electrical transmission or interconnection systems
Superimposed unlike currents
Ac and dc sources
Reexamination Certificate
active
08030795
ABSTRACT:
Increased cable length Power over Ethernet (PoE) systems are provided. Embodiments can be designed for compliance with IEEE 802.3af, IEEE 802.3at, or legacy PoE standards. Embodiments include PSE and PD designs enabled for increased length PoE. Embodiments include example modifications of IEEE 802.3af PSE system rules, including example modifications of PSE port voltage ranges to support IEEE 802.3af compliant PDs across increased cable lengths. Embodiments include example modifications of IEEE 802.3af PD system rules, including example modifications of PD port voltage ranges to enable current IEEE compliant PSEs to support increased cable length PoE. Embodiments include PDs having increased voltage process and/or added voltage protection circuitry to support increased length PoE. Modifications of PSE system rules and PD system rules can be performed independently of each others, so that modified PSEs can be made to work with existing PDs, or vice versa.
REFERENCES:
patent: 6125048 (2000-09-01), Loughran et al.
patent: 7170194 (2007-01-01), Korcharz et al.
patent: 7404091 (2008-07-01), Gere
patent: 2005/0132240 (2005-06-01), Stineman et al.
patent: 2005/0262364 (2005-11-01), Diab et al.
patent: 2008/0172564 (2008-07-01), Diab et al.
patent: 2008/0276104 (2008-11-01), Hussain et al.
patent: 2008/0315682 (2008-12-01), Hussain
patent: 2011/0004773 (2011-01-01), Hussain et al.
National Semiconductor News Release dated Jan. 16, 2006, “National Semiconductor Introduces Industry's First Single-Chip, Power over Ethernet Device Controller Designed for Low-Voltage Auxiliary Power Sources”, obtained from http://www.national.com
ews on Jun. 23, 2009.
MAXIM MAX5941A/MAX5941B, MAXIM IEEE 802.af-Complaint Power-Over-Ethernet Interface/PWM Controller for Power Devices: 19-3069; Rev 0; Oct. 2003, copyright 2003, MAXIM Integrated Products, Sunnyvale, CA; pp. 1-24.
Texas Instruments IEEE 802.3af POE Powered Device Controllers, SLVS525A-Apr. 2004-Revised Sep. 2004, TPS2375,2376,2377. Copyright 2004, Texas Instruments Incorporated, Dallas, Texas; pp. 1-21.
National Semiconductor LM5071 Power Over Ethernet PD Controller with Auxiliary Power Interface, Apr. 2006, DS201684, Copyright 2006, National Semiconductor Corporation; pp. 1-18.
Hussain Asif
Panguluri Sesha Thalpasai
Broadcom Corporation
Fleming Fritz M
Sterne Kessler Goldstein & Fox P.L.L.C.
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