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Patent Agency Ranking
公开(公告)号：US10261477B2
公开(公告)日：2019-04-16
申请号：US15863571
申请日：2018-01-05
Applicant: Linear Technology Corporation
Inventor： David Dwelley , Jeffrey Heath , Kirk Su , Ryan Huff
Abstract: In a method performed by a PoE system, a PSE provides data and operating voltage over Ethernet wires to a PD. Before the full PoE voltage is supplied, the PSE generates a low current signal received by the PD. A circuit in the PD, connected across its input terminals, has a characteristic analog response to the PSE signal corresponding to the PD's PoE requirements, such as whether the PD is a Type 1 or Type 2 PD. The circuit may be a certain value capacitor, zener diode, resistor, or other circuit. The PSE may generate a fixed current, fixed voltage, or time varying signal. Upon the PSE sensing the magnitude of the analog signal response at a particular time, the PSE associates the response with the PoE requirements of the PD. The PSE then applies the full PoE voltage in accordance with the PD's PoE requirements.
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2.发明授权Power over Ethernet system where power sourcing equipment detects actual voltage at powered device 有权以太网供电系统，其中电源设备检测受电设备的实际电压公开(公告)号：US09488997B1
公开(公告)日：2016-11-08
申请号：US14054440
申请日：2013-10-15
Applicant: Linear Technology Corporation
Inventor： David Dwelley , Jeffrey Heath , Ryan Huff
CPC classification number: G05F1/10 , B60R16/03 , G05F1/462 , H04L12/10 , H04L41/0681 , Y02D30/30 , Y02D30/32
Abstract: A Power Over Ethernet (PoE) system, or other power over data lines system, includes Power Sourcing Equipment (PSE) providing combined data and voltage over wires to a Powered Device (PD). Since cable length and PD load currents may not be known, there is a variable voltage drop along the cable between the PSE and PD. Prior to the PD being fully powered up, a test is performed by the PSE to determine the actual resistance or voltage drop of the cable, and the results are stored in a memory accessed by the PSE upon powering up. The PSE uses the stored information to adjust its voltage source to provide a target voltage at the PD input during full power operation. This may obviate the need for a voltage regulator at the PD. The test may only be conducted when the PSE is initially powered up or may be conducted periodically.
Abstract translation: 以太网供电（PoE）系统或其他数据线供电系统包括电源设备（PSE），通过电源将有源数据和电压提供给有源设备（PD）。 由于电缆长度和PD负载电流可能未知，PSE和PD之间沿着电缆存在可变的电压降。 在PD完全上电之前，由PSE执行测试以确定电缆的实际电阻或电压降，并且将结果存储在PSE上电时访问的存储器中。 PSE使用存储的信息来调整其电压源，以在全功率运行期间在PD输入端提供目标电压。 这可以避免在PD处需要电压调节器。 该测试只能在PSE最初上电或定期进行时进行。
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公开(公告)号：US20150091391A1
公开(公告)日：2015-04-02
申请号：US14501517
申请日：2014-09-30
Applicant: Linear Technology Corporation
Inventor： David Dwelley , Jeffrey Heath , Kirk Su , Ryan Huff
CPC classification number: G05B11/01 , H02J3/00 , H04L12/10 , Y10T307/858
Abstract: In a method performed by a PoE system, a PSE provides data and operating voltage over Ethernet wires to a PD. Before the full PoE voltage is supplied, the PSE generates a low current signal received by the PD. A circuit in the PD, connected across its input terminals, has a characteristic analog response to the PSE signal corresponding to the PD's PoE requirements, such as whether the PD is a Type 1 or Type 2 PD. The circuit may be a certain value capacitor, zener diode, resistor, or other circuit. The PSE may generate a fixed current, fixed voltage, or time varying signal. Upon the PSE sensing the magnitude of the analog signal response at a particular time, the PSE associates the response with the PoE requirements of the PD. The PSE then applies the full PoE voltage in accordance with the PD's PoE requirements.
Abstract translation: 在PoE系统执行的方法中，PSE通过以太网线将数据和工作电压提供给PD。 在提供完整的PoE电压之前，PSE产生PD接收到的低电流信号。 连接在其输入端子上的PD中的电路具有对应于PD的PoE要求的PSE信号的特征模拟响应，例如PD是1型或2型PD。 该电路可以是一定值电容器，齐纳二极管，电阻器或其他电路。 PSE可以产生固定电流，固定电压或时变信号。 在PSE感测特定时间的模拟信号响应的幅度时，PSE将响应与PD的PoE要求相关联。 PSE然后根据PD的PoE要求施加完整的PoE电压。
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公开(公告)号：US20180129171A1
公开(公告)日：2018-05-10
申请号：US15863571
申请日：2018-01-05
Applicant: Linear Technology Corporation
Inventor： David Dwelley , Jeffrey Heath , Kirk Su , Ryan Huff
CPC classification number: G05B11/01 , H02J3/00 , H04L12/10 , Y10T307/858
Abstract: In a method performed by a PoE system, a PSE provides data and operating voltage over Ethernet wires to a PD. Before the full PoE voltage is supplied, the PSE generates a low current signal received by the PD. A circuit in the PD, connected across its input terminals, has a characteristic analog response to the PSE signal corresponding to the PD's PoE requirements, such as whether the PD is a Type 1 or Type 2 PD. The circuit may be a certain value capacitor, zener diode, resistor, or other circuit. The PSE may generate a fixed current, fixed voltage, or time varying signal. Upon the PSE sensing the magnitude of the analog signal response at a particular time, the PSE associates the response with the PoE requirements of the PD. The PSE then applies the full PoE voltage in accordance with the PD's PoE requirements.
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公开(公告)号：US09897981B2
公开(公告)日：2018-02-20
申请号：US14501517
申请日：2014-09-30
Applicant: Linear Technology Corporation
Inventor： David Dwelley , Jeffrey Heath , Kirk Su , Ryan Huff
CPC classification number: G05B11/01 , H02J3/00 , H04L12/10 , Y10T307/858
Abstract: In a method performed by a PoE system, a PSE provides data and operating voltage over Ethernet wires to a PD. Before the full PoE voltage is supplied, the PSE generates a low current signal received by the PD. A circuit in the PD, connected across its input terminals, has a characteristic analog response to the PSE signal corresponding to the PD's PoE requirements, such as whether the PD is a Type 1 or Type 2 PD. The circuit may be a certain value capacitor, zener diode, resistor, or other circuit. The PSE may generate a fixed current, fixed voltage, or time varying signal. Upon the PSE sensing the magnitude of the analog signal response at a particular time, the PSE associates the response with the PoE requirements of the PD. The PSE then applies the full PoE voltage in accordance with the PD's PoE requirements.
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