New! View global litigation for patent families

WO2007084496A3 - Power over ethernet controller integrated circuit architecture - Google Patents

Power over ethernet controller integrated circuit architecture

Info

Publication number
WO2007084496A3
WO2007084496A3 PCT/US2007/001119 US2007001119W WO2007084496A3 WO 2007084496 A3 WO2007084496 A3 WO 2007084496A3 US 2007001119 W US2007001119 W US 2007001119W WO 2007084496 A3 WO2007084496 A3 WO 2007084496A3
Authority
WO
Grant status
Application
Patent type
Prior art keywords
power
pd
pse
dc
over
Prior art date
Application number
PCT/US2007/001119
Other languages
French (fr)
Other versions
WO2007084496A2 (en )
Inventor
Pieter Vorenkamp
Agnes Woo
Anil Tammineedi
Ichiro Fujimori
David Chin
John Perzow
Original Assignee
Broadcom Corp
Pieter Vorenkamp
Agnes Woo
Anil Tammineedi
Ichiro Fujimori
David Chin
John Perzow
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date

Links

Classifications

    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06FELECTRICAL DIGITAL DATA PROCESSING
    • G06F1/00Details of data-processing equipment not covered by groups G06F3/00 - G06F13/00, e.g. cooling, packaging or power supply specially adapted for computer application
    • G06F1/26Power supply means, e.g. regulation thereof
    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06FELECTRICAL DIGITAL DATA PROCESSING
    • G06F1/00Details of data-processing equipment not covered by groups G06F3/00 - G06F13/00, e.g. cooling, packaging or power supply specially adapted for computer application
    • G06F1/26Power supply means, e.g. regulation thereof
    • G06F1/266Arrangements to supply power to external peripherals either directly from the computer or under computer control, e.g. supply of power through the communication port, computer controlled power-strips
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B3/00Line transmission systems
    • H04B3/02Details
    • H04B3/44Arrangements for feeding power to a repeater along the transmission line
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00Data switching networks
    • H04L12/02Details
    • H04L12/10Current supply arrangements
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00Data switching networks
    • H04L12/28Data switching networks characterised by path configuration, e.g. local area networks [LAN], wide area networks [WAN]
    • H04L12/40Bus networks
    • H04L12/40006Architecture of a communication node
    • H04L12/40045Details regarding the feeding of energy to the node from the bus
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00Baseband systems
    • H04L25/02Details ; Arrangements for supplying electrical power along data transmission lines
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10STECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S370/00Multiplex communications
    • Y10S370/908Local area network
    • Y10S370/91Carrier sense multiple access, e.g. ethernet, 10base-t
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T307/00Electrical transmission or interconnection systems
    • Y10T307/50Plural supply circuits or sources
    • Y10T307/724Connecting or disconnecting

Abstract

Power over Ethernet (PoE) communication systems provide power and data communications over the same communications link, where a power source device (PSE) provides DC power (for example, 48 volts DC) to a powered device (PD). The DC power is transmitted simultaneously over the same communications medium with the high speed data from one node to the other node. The PSE typically includes a controller that controls the DC power provided to the PD at the second node of the communications link. The PSE controller measures the voltage, current, and temperature of the outgoing and incoming DC supply lines to characterize the power requirements of the PD. In addition, the PSE controller may detect and validate a compatible PD, determine a power classification signature for the validated PD, supply power to the PD, monitor the power, and reduce or remove the power from the PD when the power is no longer requested or required. During detection, if the PSE finds the PD to be non-compatible, the PSE can prevent the application of power to that PD device, protecting the PD from possible damage.
PCT/US2007/001119 2006-01-17 2007-01-17 Power over ethernet controller integrated circuit architecture WO2007084496A3 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US75898406 true 2006-01-17 2006-01-17
US60/758,984 2006-01-17

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN 200780003043 CN101371492B (en) 2006-01-17 2007-01-17 Power over Ethernet controller and method for detecting and classifying power supply equipment
EP20070716675 EP1980050B1 (en) 2006-01-17 2007-01-17 Power over ethernet controller integrated circuit architecture

Publications (2)

Publication Number Publication Date
WO2007084496A2 true WO2007084496A2 (en) 2007-07-26
WO2007084496A3 true true WO2007084496A3 (en) 2007-09-20

Family

ID=38180685

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2007/001119 WO2007084496A3 (en) 2006-01-17 2007-01-17 Power over ethernet controller integrated circuit architecture

Country Status (5)

Country Link
US (10) US7782094B2 (en)
EP (1) EP1980050B1 (en)
KR (1) KR101008509B1 (en)
CN (1) CN101371492B (en)
WO (1) WO2007084496A3 (en)

Families Citing this family (104)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7545057B1 (en) 2005-01-04 2009-06-09 Marvell International Ltd, Relay circuitry and switching circuitry for power-over-network devices
US7404094B2 (en) * 2005-03-08 2008-07-22 Realtek Semiconductor Corp. Relay set in network device and method thereof
US7977919B1 (en) 2005-04-06 2011-07-12 Rf Micro Devices, Inc. Over-voltage protection accounting for battery droop
US20080048779A1 (en) * 2006-05-16 2008-02-28 Crawley Philip J Active emi suppression circuit
US7782094B2 (en) 2006-01-17 2010-08-24 Broadcom Corporation Apparatus for sensing an output current in a communications device
US7589946B2 (en) * 2006-02-15 2009-09-15 Adc Dsl Systems, Inc. Local access port communications using near field induction
US7974305B2 (en) * 2006-03-24 2011-07-05 Broadcom Corporation Inband management for power over ethernet midspans using an embedded switch
US8205099B2 (en) * 2006-04-07 2012-06-19 Broadcom Corporation Power over Ethernet connector with integrated power source equipment (PSE) controller
US7516340B2 (en) * 2006-06-30 2009-04-07 Silicon Laboratories, Inc. Powered device including a classification signature resistor
US7979168B2 (en) * 2006-07-25 2011-07-12 Silicon Laboratories Inc. Powered device including a multi-use detection resistor
EP1903653A3 (en) * 2006-08-31 2015-04-01 Broadcom Corporation Over-voltage protection for power and data applications
JP4983377B2 (en) * 2007-01-11 2012-07-25 パナソニック株式会社 A voltage detector of the storage element
US7956615B1 (en) 2007-02-27 2011-06-07 Rf Micro Devices, Inc. Utilizing computed battery resistance as a battery-life indicator in a mobile terminal
US7962109B1 (en) * 2007-02-27 2011-06-14 Rf Micro Devices, Inc. Excess current and saturation detection and correction in a power amplifier
CA2681103C (en) * 2007-03-14 2015-06-30 Zonit Structured Solutions, Llc Smart nema outlets and associated networks
US8037324B2 (en) * 2007-03-20 2011-10-11 Broadcom Corporation Power over ethernet connector with integrated power source equipment (PSE) controller supporting high power applications
US20080244129A1 (en) * 2007-03-29 2008-10-02 Aten International Co., Ltd. Master device of two-wire bus providing release function for clock line and method thereof
WO2008136028A1 (en) * 2007-05-08 2008-11-13 Stmicroelectronics S.R.L. Method of discrimination of a device as powerable through a lan line and device for estimating electric parameters of a lan line
US7873845B2 (en) * 2007-07-11 2011-01-18 Cisco Technology, Inc. Classification technique for powered devices using selective frequency filtering
US7994747B2 (en) * 2007-07-13 2011-08-09 Seagate Technology Llc Suppressing phased motor voltage transients on disconnect
US7855474B2 (en) * 2007-08-28 2010-12-21 Broadcom Corporation System and method for pre-detection in a power over ethernet system
JP4683034B2 (en) * 2007-10-31 2011-05-11 ソニー株式会社 Power supply system, the monitoring device, monitoring method and a computer program
US7902694B2 (en) * 2007-11-08 2011-03-08 Cisco Technology, Inc. Dynamic current limits
US7679878B2 (en) * 2007-12-21 2010-03-16 Broadcom Corporation Capacitor sharing surge protection circuit
US20090172656A1 (en) * 2007-12-31 2009-07-02 Silicon Laboratories Inc. Circuit device and method of providing a programmable power supply
US9030976B2 (en) * 2008-03-27 2015-05-12 Silicon Image, Inc. Bi-directional digital interface for video and audio (DIVA)
US7791221B2 (en) * 2008-05-05 2010-09-07 Silicon Laboratories, Inc. Power sourcing equipment device including a serial interface
US8095710B2 (en) * 2008-06-30 2012-01-10 Silicon Laboratories Inc. System and method of providing electrical isolation
US7845984B2 (en) * 2008-07-01 2010-12-07 Pulse Engineering, Inc. Power-enabled connector assembly and method of manufacturing
US20100007334A1 (en) * 2008-07-08 2010-01-14 Silicon Laboratories Inc. Power sourcing equipment device and method of providing a power supply to a powered device
KR101650793B1 (en) * 2008-12-11 2016-08-24 래티스세미컨덕터코퍼레이션 Power delivery over digital interaction interface for video and audio (diiva)
US20100148708A1 (en) * 2008-12-11 2010-06-17 Jorgenson Joel A Voltage scaling of an electric motor load to reduce power consumption
CN102257451B (en) * 2008-12-16 2014-07-09 意法爱立信有限公司 Circuit system and method of controlling power management
US8037352B2 (en) * 2008-12-29 2011-10-11 Moxa Inc. Method for auto power restoration
WO2010083073A3 (en) * 2009-01-13 2010-10-21 Rambus Inc. Protocol including timing calibration between memory request and data transfer
EP2222018A1 (en) * 2009-02-24 2010-08-25 Alcatel Lucent A method of centralized ethernet network shutdown
US8793511B1 (en) * 2009-03-23 2014-07-29 Marvell International Ltd. Power management for power over ethernet (PoE) system based on network communication transmission rate
FR2944661B1 (en) * 2009-04-21 2012-04-13 Peugeot Citroen Automobiles Sa non-intrusive device of fault diagnosis (s) operating in at least one communication network
CN101594236B (en) 2009-06-29 2012-09-05 华为技术有限公司 Method, device and system for realizing power over Ethernet (POE)
CN101998033A (en) * 2009-08-20 2011-03-30 鸿富锦精密工业(深圳)有限公司;鸿海精密工业股份有限公司 Electronic equipment and mother board thereof
US20110051479A1 (en) * 2009-08-27 2011-03-03 Dell Products L.P. Systems and Methods for Controlling Phases of Multiphase Voltage Regulators
US9101028B2 (en) 2009-09-01 2015-08-04 NuLEDs, Inc. Powering and/or controlling LEDs using a network infrastructure
US20110055598A1 (en) * 2009-09-02 2011-03-03 Broadcom Corporation AC Disconnect of Power Over Ethernet Devices
US8898446B2 (en) * 2010-01-05 2014-11-25 Microsemi Corp.—Analog Mixed Signal Group, Ltd. Power over ethernet extender suitable for use with multiple powering arrangements
KR20120123086A (en) 2010-01-12 2012-11-07 시너칩 유에스에이 코포레이션 Video management and control in home multimedia network
CN102714597B (en) 2010-01-31 2015-11-25 惠普发展公司,有限责任合伙企业 A method for reducing the error of the power receiving device detected
KR101611296B1 (en) * 2010-02-09 2016-04-12 엘지전자 주식회사 Method and apparatus for controlling power using a smart device
US20110219244A1 (en) * 2010-03-05 2011-09-08 Hsi-Mien Wu Power extracting system and a splitter
US8412961B2 (en) 2010-04-16 2013-04-02 Silicon Laboratories Inc. Circuit and method for detecting a legacy powered device in a power over Ethernet system
US8321695B2 (en) 2010-04-19 2012-11-27 Broadcom Corporation System and method for physical layer device enabled power over ethernet processing
CN102918798B (en) * 2010-06-04 2016-04-13 皇家飞利浦电子股份有限公司 Cascade Power over Ethernet System
CN102281623B (en) * 2010-06-11 2014-02-19 华为技术有限公司 Method for regulating equipment power, detection control subsystem and equipment system
US8255578B2 (en) * 2010-06-14 2012-08-28 Microsoft Corporation Preventing access to a device from an external interface
JP5589658B2 (en) * 2010-08-12 2014-09-17 富士通株式会社 METHOD clock supply device and a clock supply
US8868946B2 (en) * 2010-09-08 2014-10-21 Texas Instruments Incorporated Maintaining power to a powered device during a low power mode of the powered device
CN103339581B (en) 2010-10-04 2016-01-20 阿沃森特亨茨维尔公司 The remote access device having a backup power system
CN102457384A (en) * 2010-10-28 2012-05-16 鸿富锦精密工业(深圳)有限公司 Power device
CN102136915B (en) * 2010-12-07 2013-04-17 华为技术有限公司 Method and device for strengthening power over Ethernet (POE) security
CN103443735A (en) * 2011-03-18 2013-12-11 阿沃森特亨茨维尔公司 System and method for real time detection and correlation of devices and power outlets
RU2459351C1 (en) * 2011-06-16 2012-08-20 Открытое акционерное общество "Научно-исследовательский институт физических измерений" Device for generating pulses from signals of rotational frequency inductive sensors
KR101229679B1 (en) * 2011-08-01 2013-02-04 옥주헌 Apparatus for relaying composite signal
CN102238052B (en) * 2011-08-05 2014-04-09 杭州电子科技大学 Distributed detection node networking communication terminal
US8839008B2 (en) * 2011-09-23 2014-09-16 Broadcom Corporation System and method for detecting configuration of a power sourcing equipment device connected to a powered device by simultaneously measuring voltage at two terminals of a resistor disposed within the powered device
CN102387022B (en) 2011-10-20 2016-08-31 华为技术有限公司 Power over Ethernet method and apparatus
WO2013061323A1 (en) * 2011-10-27 2013-05-02 Microsemi Corp. - Analog Mixed Signal Group, Ltd. Power sourcing equipment for power over ethernet with low energy standby mode
CN102411393B (en) * 2011-11-02 2013-10-02 四川和芯微电子股份有限公司 A reference current source circuit and system
US8823402B2 (en) * 2011-11-23 2014-09-02 Broadcom Corporation Cable resistance determination in high-power PoE networks
US9152161B2 (en) * 2011-12-20 2015-10-06 Maxim Integrated Products, Inc. Maintain power signature (MPS) powered device (PD)
CN103384199B (en) * 2011-12-31 2017-09-05 华为数字技术(成都)有限公司 A power supply method, the power supply system converter and Ethernet
US20150244535A1 (en) * 2012-01-19 2015-08-27 Telefonaktiebolaget L M Ericsson (Publ) Power over ethernet supervision
US9213049B2 (en) * 2012-01-24 2015-12-15 Microsemi Corp.—Analog Mixed Signal Group, Ltd. Power device interface arranged to detect amount of power available
CN103364654B (en) 2012-03-30 2015-10-28 纬创资通股份有限公司 Test board power supply network apparatus test system and test method
US8930726B2 (en) * 2012-06-13 2015-01-06 Broadcom Corporation Physical layer device auto-adjustment based on power over Ethernet magnetic heating
RU2490787C1 (en) * 2012-07-02 2013-08-20 Открытое акционерное общество "Научно-исследовательский институт физических измерений" Device for generating pulses from signals of rotational frequency inductive sensors
US8558413B1 (en) * 2012-07-09 2013-10-15 Global Green Lighting, LLC Light fixture having power over ethernet power sourcing equipment
US8558577B1 (en) * 2012-07-31 2013-10-15 Hewlett-Packard Development Company, L.P. Systems and methods for bidirectional signal separation
US9548613B2 (en) * 2012-09-27 2017-01-17 Maxim Integrated Products, Inc. Maintain power signature (MPS) from a powered device (PD) while power is drawn from another source
US9640989B2 (en) * 2012-09-27 2017-05-02 Maxim Integrated Products, Inc. Powered device controllers having shared connection interfaces and two-level inrush current limit
US9319101B2 (en) * 2012-09-28 2016-04-19 Siemens Industry, Inc. System and method for ground fault detection in a transformer isolated communication channel of a network device
US9377794B1 (en) * 2012-10-15 2016-06-28 Linear Technology Corporation Rapid power up of Power Over Ethernet equipment system
FR2999028B1 (en) * 2012-11-30 2016-02-05 Schneider Electric Ind Sas Device for protecting against overvoltages on PLC supply.
CN103067182B (en) * 2012-12-26 2015-09-23 上海华为技术有限公司 A way to force the power supply apparatus and power supply method
US9430323B2 (en) * 2013-02-01 2016-08-30 Broadcom Corporation Power mode register reduction and power rail bring up enhancement
DE102013102349B4 (en) 2013-03-08 2016-08-25 Borgwarner Ludwigsburg Gmbh A method for operating a glow plug, and glow plug
US20140277613A1 (en) * 2013-03-14 2014-09-18 Tait Towers Manufacturing, LLC Emergency stop system for an automation and motion control system
US9450419B2 (en) * 2013-03-15 2016-09-20 Microchip Technology Incorporated Combined power supply and input/output system with boost capability
US9240752B2 (en) 2013-03-26 2016-01-19 Stmicroelectronics S.R.L. Power oscillator apparatus with transformer-based power combining
US9306614B2 (en) * 2013-03-26 2016-04-05 Stmicroelectronics S.R.L. Power oscillator apparatus with transformer-based power combining for galvanically-isolated bidirectional data communication and power transfer
CN103399605B (en) * 2013-07-15 2015-04-22 山东紫光比威网络技术有限公司 Intelligent remote constant-voltage POE (power over Ethernet) system
CN104426707A (en) * 2013-08-20 2015-03-18 华为技术有限公司 Method for detecting power over Ethernet and power sourcing equipment
US9897981B2 (en) * 2013-10-01 2018-02-20 Linear Technology Corporation Detection and classification scheme for power over ethernet system
US9369176B2 (en) * 2013-11-11 2016-06-14 Cisco Technology, Inc. Detection, classification and mutual recognition of 4 pair power over Ethernet
US9118651B2 (en) * 2013-11-22 2015-08-25 Hyundai Motor Company Control unit for in-vehicle ethernet and method for controlling thereof
US9747184B2 (en) * 2013-12-16 2017-08-29 Artesyn Embedded Computing, Inc. Operation of I/O in a safe system
EP2930837A1 (en) * 2014-04-10 2015-10-14 GE Energy Power Conversion Technology Ltd Power converters
CN104168121A (en) * 2014-07-14 2014-11-26 杭州华三通信技术有限公司 Port protection method of PSE and PSE
US9806521B2 (en) * 2014-10-29 2017-10-31 Silicon Laboratories Inc. Electrostatic discharge protection for a transformer balun
US9847884B2 (en) * 2014-11-04 2017-12-19 Cisco Technology, Inc. Negotiable PoE voltage for improved efficiency based on cable and powered device losses
US20160156173A1 (en) * 2014-12-01 2016-06-02 Linear Technology Corporation CIRCUIT ARCHITECTURES FOR PROTECTING AGAINST PoDL WIRE FAULTS
US9502830B2 (en) * 2014-12-03 2016-11-22 Commscope, Inc. Of North Carolina Multimedia faceplates having ethernet conversion circuitry
JP2016116110A (en) * 2014-12-16 2016-06-23 富士通株式会社 Communication apparatus
US9735145B2 (en) 2015-02-18 2017-08-15 Silicon Laboratories Inc. Electrostatic discharge protection for a balun
CN104793544B (en) * 2015-04-17 2017-12-15 深圳市东明炬创电子有限公司 One kind of bi-directional Ethernet poe power supply system
CN104991143B (en) * 2015-07-10 2018-01-23 博为科技有限公司 The power detecting circuit apparatus, power detecting apparatus and method of the power device

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030099076A1 (en) * 1999-08-02 2003-05-29 Shimon Elkayam Integral board and module for power over LAN
US20040201931A1 (en) * 2002-10-14 2004-10-14 Dror Korcharz Configurable multiple power source system

Family Cites Families (102)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US155963A (en) * 1874-10-13 Improvement in lockets
US132220A (en) * 1872-10-15 Improvement in breech-loading ordnance
US162202A (en) * 1875-04-20 Improvement in thill-couplings
US3846787A (en) * 1972-08-17 1974-11-05 Itt Time division multiplexer employing digital gates and a digital-to-analog converter
US4215317A (en) * 1978-11-27 1980-07-29 Omni Spectra, Inc. Compensated operational amplifier circuit
NL8503394A (en) * 1985-12-10 1987-07-01 Philips Nv Current-sensing circuit for a power semiconductor device, in particular integrated intelligent power semiconductor switch, in particular for automotive applications.
US5006846A (en) * 1987-11-12 1991-04-09 Granville J Michael Power transmission line monitoring system
GB8913439D0 (en) * 1989-06-12 1989-08-02 Inmos Ltd Current mirror circuit
US4990845A (en) 1989-12-18 1991-02-05 Alfred E. Mann Foundation For Scientific Research Floating current source
US5321849A (en) * 1991-05-22 1994-06-14 Southwestern Bell Technology Resources, Inc. System for controlling signal level at both ends of a transmission link based on a detected valve
US5220207A (en) * 1991-09-03 1993-06-15 Allegro Microsystems, Inc. Load current monitor for MOS driver
US5519310A (en) 1993-09-23 1996-05-21 At&T Global Information Solutions Company Voltage-to-current converter without series sensing resistor
DE69421083T2 (en) 1994-11-17 2000-03-16 St Microelectronics Srl Protection circuit and method for power transistor, and this use Direction Voltage Regulators
US5610486A (en) * 1995-02-28 1997-03-11 Sgs-Thomson Microelectronics, Inc. Current mirror circuit used in a coil driver circuit of a brushless DC motor
KR0166509B1 (en) * 1995-12-29 1999-01-15 김주용 Electrostatic protection circuit
US5838145A (en) * 1996-05-30 1998-11-17 Poon; Franki Ngai Kit Transient load corrector for switching converters
US5939905A (en) * 1996-09-27 1999-08-17 Texas Instruments Incorporated Loop control detection circuit and method for detecting current feedback
US6025746A (en) * 1996-12-23 2000-02-15 Stmicroelectronics, Inc. ESD protection circuits
KR100243004B1 (en) * 1997-02-27 2000-03-02 김영환 Bootstrap charge pump circuit
US5764030A (en) * 1997-03-14 1998-06-09 International Components Corporation Microcontrolled battery charger
DE19825029B4 (en) 1997-06-05 2009-11-26 DENSO CORPORATION, Kariya-shi Current-measuring circuit for measuring a current flowing through an electric load
US6005439A (en) * 1998-07-09 1999-12-21 National Semiconductor Corporation Unity gain signal amplifier
EP0994403B1 (en) * 1998-10-15 2003-05-21 Lucent Technologies Inc. Current mirror
JP3977530B2 (en) * 1998-11-27 2007-09-19 株式会社東芝 Current mirror circuit and the current source circuit
JP3554497B2 (en) * 1998-12-08 2004-08-18 シャープ株式会社 The charge pump circuit
US7612470B2 (en) * 1999-01-12 2009-11-03 Microsemi Corp.—Analog Mixed Signal Group Ltd. System for providing power over Ethernet through a patch panel
US6184659B1 (en) * 1999-02-16 2001-02-06 Microchip Technology Incorporated Microcontroller with integral switch mode power supply controller
GB9908285D0 (en) 1999-04-13 1999-06-02 Koninkl Philips Electronics Nv A power switching circuit
DE19920465C1 (en) * 1999-05-04 2000-11-02 Siemens Ag Method for open-load diagnosis of a switching stage
JP3454186B2 (en) * 1999-05-14 2003-10-06 株式会社日立製作所 Power converter
JP4242006B2 (en) * 1999-06-23 2009-03-18 株式会社ルネサステクノロジ The charge pump circuit and the nonvolatile semiconductor memory device using the same
US6280081B1 (en) * 1999-07-09 2001-08-28 Applied Materials, Inc. Methods and apparatus for calibrating temperature measurements and measuring currents
JP2001068948A (en) * 1999-08-27 2001-03-16 Hitachi Kokusai Electric Inc Mosfet amplifier circuit
FR2798871B1 (en) * 1999-09-24 2001-11-02 Usinor Method for producing carbon steel strips, especially of steel for packaging, and tapes thus produced
US6535983B1 (en) * 1999-11-08 2003-03-18 3Com Corporation System and method for signaling and detecting request for power over ethernet
JP2001244418A (en) * 2000-03-01 2001-09-07 Nec Corp Semiconductor integrated circuit device
US6300749B1 (en) 2000-05-02 2001-10-09 Stmicroelectronics S.R.L. Linear voltage regulator with zero mobile compensation
US6624671B2 (en) * 2000-05-04 2003-09-23 Exar Corporation Wide-band replica output current sensing circuit
US6515489B2 (en) * 2000-07-18 2003-02-04 Samsung Electronics Co., Ltd. Apparatus for sensing position of electrostatic XY-stage through time-division multiplexing
JP3509725B2 (en) * 2000-09-06 2004-03-22 富士通株式会社 Power supply control circuit, the power supply device, the power control method and an electronic apparatus
US6452766B1 (en) * 2000-10-30 2002-09-17 National Semiconductor Corporation Over-current protection circuit
US6717787B2 (en) * 2001-02-22 2004-04-06 Koninklijke Philips Electronics N.V. Current sensing IC with resistive sensing
DE10112304C1 (en) * 2001-03-14 2002-07-18 Siemens Ag Measured value detection and processing unit for small measuring signals uses digital signal processor for compensation of detected background noise
US6597183B1 (en) * 2001-12-28 2003-07-22 Texas Instruments Incorporated Resistance measurement system
KR100404001B1 (en) * 2001-12-29 2003-11-05 주식회사 하이닉스반도체 Charge pump circuit
US6770938B1 (en) * 2002-01-16 2004-08-03 Advanced Micro Devices, Inc. Diode fabrication for ESD/EOS protection
US7061327B2 (en) * 2002-01-24 2006-06-13 Maxim Integrated Products, Inc. Single supply headphone driver/charge pump combination
US7183857B2 (en) * 2002-01-24 2007-02-27 Maxim Integrated Products Inc. Single supply direct drive amplifier
US6924963B2 (en) * 2002-02-14 2005-08-02 Intersil Americas Inc. ESD protection network utilizing precharge bus lines
US6781440B2 (en) * 2002-02-18 2004-08-24 Winbond Electronics Corp. Charge pump circuit with voltage multiplier for boosting clock signal and method thereof
US6853566B2 (en) * 2002-04-18 2005-02-08 Ricoh Company, Ltd. Charge pump circuit and power supply circuit
US6600690B1 (en) 2002-06-28 2003-07-29 Motorola, Inc. Sense amplifier for a memory having at least two distinct resistance states
JP3864864B2 (en) * 2002-07-11 2007-01-10 株式会社デンソー Clamp circuit
US6798182B2 (en) * 2002-09-09 2004-09-28 Koniklijke Philips Electronics N.V. High output impedance current mirror with superior output voltage compliance
US7547619B2 (en) 2002-09-20 2009-06-16 Panasonic Corporation Method of introducing impurity, device and element
US6798177B1 (en) * 2002-10-15 2004-09-28 Arques Technology, Inc. Boost-buck cascade converter for pulsating loads
US7042690B2 (en) * 2002-12-19 2006-05-09 Texas Instruments Incorporated Power-line, differential, isolation loss detector
JP4059077B2 (en) * 2002-12-26 2008-03-12 ソニー株式会社 Charge pump and pll circuit using the same
US20040164619A1 (en) * 2003-02-21 2004-08-26 Parker Timothy J. Connector module with embedded Power-Over-Ethernet functionality
US7362554B2 (en) * 2003-05-08 2008-04-22 Silicon Labs Cp, Inc. Electrostatic discharge (ESD) clamp using output driver
US7372685B2 (en) * 2003-05-20 2008-05-13 On Semiconductor Multi-fault protected high side switch with current sense
US7970003B2 (en) * 2003-05-30 2011-06-28 General Dynamics Advanced Information Systems Inc. Low power telemetry system and method
US7592899B2 (en) * 2004-06-01 2009-09-22 General Dynamics Advanced Information Systems, Inc. Low power telemetry system and method
JP2005064462A (en) * 2003-07-28 2005-03-10 Nec Electronics Corp Multi-finger type electrostatic discharging protective element
US7356588B2 (en) * 2003-12-16 2008-04-08 Linear Technology Corporation Circuits and methods for detecting the presence of a powered device in a powered network
JP4121511B2 (en) * 2004-03-30 2008-07-23 三洋電機株式会社 Power Supply
US7053699B2 (en) * 2004-05-11 2006-05-30 Elantec Semiconductor, Inc. Current output stages
EP1599067B1 (en) * 2004-05-21 2013-05-01 Epcos Pte Ltd Detection and control of diaphragm collapse in condenser microphones
US7161393B1 (en) 2004-06-03 2007-01-09 National Semiconductor Corporation Current regulation circuit
US7262628B2 (en) * 2004-07-02 2007-08-28 Primarion, Inc. Digital calibration with lossless current sensing in a multiphase switched power converter
US7417877B2 (en) * 2004-07-27 2008-08-26 Silicon Laboratories Inc. Digital power supply with programmable soft start
US7657191B2 (en) 2004-08-25 2010-02-02 Vitesse Semiconductor Corporation Variable bandwidth transimpedance amplifier with one-wire interface
US7248097B2 (en) * 2004-09-02 2007-07-24 Micrel, Inc. Voltage-activated, constant current sink circuit
US7408517B1 (en) * 2004-09-14 2008-08-05 Kyocera Wireless Corp. Tunable capacitively-loaded magnetic dipole antenna
US7124041B1 (en) * 2004-09-27 2006-10-17 Siemens Energy & Automotive, Inc. Systems, methods, and devices for detecting circuit faults
US8074084B2 (en) * 2004-11-03 2011-12-06 Cisco Technology, Inc. Powered device classification in a wired data telecommunications network
US20060112285A1 (en) * 2004-11-19 2006-05-25 Linear Technology Corporation Analog power management within power over ethernet system
US7373528B2 (en) 2004-11-24 2008-05-13 Cisco Technology, Inc. Increased power for power over Ethernet applications
JP3833679B2 (en) * 2004-12-02 2006-10-18 ソニー株式会社 Battery pack and charging control method
KR100640615B1 (en) * 2004-12-20 2006-11-01 삼성전자주식회사 Charge pump circuit for generating high voltage
US7613936B2 (en) * 2005-01-25 2009-11-03 Linear Technology Corporation Dual-mode detection of powered device in power over ethernet system
US9769090B2 (en) * 2005-01-25 2017-09-19 Linear Technology Corporation Adjusting current limit thresholds based on power requirement of powered device in system for providing power over communication link
US7281141B2 (en) * 2005-01-31 2007-10-09 Powersdsine, Ltd.-Microsemi Corporation Bypass discharge path for a power sourcing equipment
US7627398B1 (en) * 2005-02-17 2009-12-01 Sifos Technologies, Inc. Apparatus providing power-over-ethernet test instrument
US20060215343A1 (en) * 2005-03-28 2006-09-28 Akros Silicon, Inc. Method for improved ESD performance within power over ethernet devices
US7593747B1 (en) * 2005-07-01 2009-09-22 Cisco Technology, Inc. Techniques for controlling delivery of power to a remotely powerable device based on temperature
US7432696B1 (en) * 2005-07-19 2008-10-07 National Semiconductor Corporation Apparatus and method for low input voltage current mirror circuit
US7492108B2 (en) * 2005-08-11 2009-02-17 Texas Instruments Incorporated System and method for driving light-emitting diodes (LEDs)
US7265628B2 (en) * 2005-09-13 2007-09-04 Analog Devices, Inc. Margin tracking cascode current mirror system and method
US7746608B2 (en) * 2005-11-02 2010-06-29 Texas Instruments Incorporated Methodology to guard ESD protection circuits against precharge effects
US7592809B1 (en) * 2005-11-23 2009-09-22 General Electric Company Hybrid k-t method of dynamic imaging with improved spatiotemporal resolution
US7782094B2 (en) * 2006-01-17 2010-08-24 Broadcom Corporation Apparatus for sensing an output current in a communications device
US7525333B1 (en) * 2006-02-17 2009-04-28 Semiconductor Components Industries, Llc Current sense circuit
US8582266B2 (en) * 2006-02-17 2013-11-12 Broadcom Corporation Current-monitoring apparatus
JP2007258243A (en) * 2006-03-20 2007-10-04 Matsushita Electric Ind Co Ltd Mos transistor characteristics detection device and cmos circuit characteristic automatic adjusting arrangement
JP4707638B2 (en) * 2006-09-30 2011-06-22 三洋電機株式会社 The power supply device for a vehicle
US7547214B2 (en) * 2007-05-22 2009-06-16 Tyco Electronics Corporation Edge-to-edge connector system for electronic devices
US7675273B2 (en) * 2007-09-28 2010-03-09 Qualcomm Incorporated Wideband low dropout voltage regulator
JP5136834B2 (en) 2007-10-16 2013-02-06 株式会社村田製作所 Power supply circuit for controlling the power supply voltage of the Rf power amplifier and rf power amplifier
US7576526B2 (en) * 2008-01-16 2009-08-18 Freescale Semiconductor, Inc Overcurrent detection circuit
US7796437B2 (en) * 2008-09-23 2010-09-14 Sandisk 3D Llc Voltage regulator with reduced sensitivity of output voltage to change in load current
US7868643B2 (en) * 2008-10-29 2011-01-11 Infineon Technologies Ag Proportional regulation for optimized current sensor performance

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030099076A1 (en) * 1999-08-02 2003-05-29 Shimon Elkayam Integral board and module for power over LAN
US20040201931A1 (en) * 2002-10-14 2004-10-14 Dror Korcharz Configurable multiple power source system

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
MENDELSON G: "All You Need To Know About Power over Ethernet (PoE) and the IEEE 802.3af Standard" INTERNET CITATION, [Online] June 2004 (2004-06), XP002372480 Retrieved from the Internet: URL:http://www.powerdsine.com/Documentatio n/WhitePapers/PoE_and_IEEE802_3 af.pdf> [retrieved on 2006-03-16] *

Also Published As

Publication number Publication date Type
US20070170909A1 (en) 2007-07-26 application
US20120250199A1 (en) 2012-10-04 application
KR101008509B1 (en) 2011-01-17 grant
KR20080084915A (en) 2008-09-22 application
US9189043B2 (en) 2015-11-17 grant
US7973567B2 (en) 2011-07-05 grant
WO2007084496A2 (en) 2007-07-26 application
EP1980050B1 (en) 2014-12-17 grant
US20100271005A1 (en) 2010-10-28 application
US20070206774A1 (en) 2007-09-06 application
US20130227313A1 (en) 2013-08-29 application
US7936546B2 (en) 2011-05-03 grant
US8782442B2 (en) 2014-07-15 grant
US7711967B2 (en) 2010-05-04 grant
US20070165345A1 (en) 2007-07-19 application
US8432142B2 (en) 2013-04-30 grant
US20070165548A1 (en) 2007-07-19 application
CN101371492A (en) 2009-02-18 application
US7782094B2 (en) 2010-08-24 grant
US20070174527A1 (en) 2007-07-26 application
US7863871B2 (en) 2011-01-04 grant
US8213141B2 (en) 2012-07-03 grant
EP1980050A2 (en) 2008-10-15 application
CN101371492B (en) 2012-08-15 grant
US20100257381A1 (en) 2010-10-07 application
US20080040625A1 (en) 2008-02-14 application

Similar Documents

Publication Publication Date Title
US20070083668A1 (en) Method and apparatus for facilitating network expansion
US7368798B2 (en) Integrated DC/DC converter substrate connections
US20090125735A1 (en) Active idle communication system
US20110125341A1 (en) Providing power to powered device having multiple power supply inputs
US20060215680A1 (en) Method for high voltage power feed on differential cable pairs
US6912282B2 (en) Enabling Cisco legacy power to support IEEE 802.3 AF standard power
US6715087B1 (en) Method of providing a remote power feed to a terminal in a local area network, and corresponding remote power feed unit, concentrator, repeator, and terminal
US20080311877A1 (en) Determination of wire metric for delivery of power to a powered device over communication cabling
US20070165345A1 (en) Power over Ethernet electrostatic discharge protection circuit
US20090265563A1 (en) Systems and methods operable to allow loop powering of networked devices
US20050085212A1 (en) High power architecture for power over Ethernet
US6546494B1 (en) Providing power to a device over a network transmission medium
US20070260904A1 (en) System and method to detect power distribution fault conditions and distribute power to a network attached power device
US20100042855A1 (en) System employing signaling at a powered communications interface to modify or override a power-withholding policy at a power-sourcing equipment
US20050201306A1 (en) Method and system for supplying power to multiple devices using power-transmitting network connections
US7294940B2 (en) Power over ethernet battery backup
CN101594236A (en) Method, device and system for realizing power over Ethernet (POE)
US20070061056A1 (en) Bypass switch for an ethernet-type network
US20060215343A1 (en) Method for improved ESD performance within power over ethernet devices
US20070133238A1 (en) Power sourcing equipment having bipolar junction transistor for controlling power supply and supporting AC disconnect-detection function
US20070217101A1 (en) Auto-resetting span-power protection
JP2002223210A (en) Device for remote power feeding terminal in telecommunication network and concentrator and repeater including the same
US7449796B2 (en) Power over ethernet controller suitable for multiple modes
US20060218418A1 (en) Method to control current imbalance between differential pairs providing a DC power feed
US7814340B2 (en) Power management mechanism in system for supplying power over communication link

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application
WWE Wipo information: entry into national phase

Ref document number: 200780003043.3

Country of ref document: CN

NENP Non-entry into the national phase in:

Ref country code: DE