公开(公告)号：US10135626B2

公开(公告)日：2018-11-20

申请号：US15098251

申请日：2016-04-13

Applicant: Broadcom Corporation

Inventor： Neven Pischl ,  Ahmad Chini ,  Sesha Panguluri ,  Mehmet Vakif Tazebay ,  Mohammad Tabatabai

IPC: H04B15/00 ,  H04L12/10

Abstract: A circuit for power on data line (PoDL) injection includes a power source, a first and a second coupling component, and an interface. The power source provides one or more DC voltage levels. The first coupling component couples the power source to an interface for coupling to a transmission medium. An Ethernet device is coupled through the second coupling component to the interface. The first coupling component is a balanced component, and the Ethernet device is isolated from the power source via a pair of DC blocking capacitors connected between the first coupling component and the second coupling component.

公开(公告)号：US08872579B2

公开(公告)日：2014-10-28

申请号：US13658769

申请日：2012-10-23

Applicant: Broadcom Corporation

Inventor： Marius Vladan ,  Sesha Panguluri

IPC: G05F1/10 ,  G05F3/02

CPC classification number: H04L12/413

Abstract: Systems and methods are provided for power control. In some implementations, a power control system includes a first transistor having a drain coupled to a first conductor (e.g., first pair of wires of an Ethernet cable), a second transistor having a drain coupled to a second conductor (e.g., second pair of wires of the Ethernet cable), a current sensor coupled to sources of the first and second transistors, and a current management circuit. The current management circuit may detect drain voltages of the first transistor and the second transistor, and adjust gate voltages of the first transistor and the second transistor to keep the drain voltages of the first transistor and the second transistor approximately equal. The current management circuit may detect a current through the current sensor, and adjust the gate voltages of the first transistor and the second transistor to limit the detected current to a current limit.

Abstract translation: 提供系统和方法进行功率控制。 在一些实施方式中，功率控制系统包括具有耦合到第一导体（例如，以太网电缆的第一对导线）的漏极的第一晶体管，具有耦合到第二导体（例如，第二对 以太网电缆的电线），耦合到第一和第二晶体管的源极的电流传感器，以及电流管理电路。 电流管理电路可以检测第一晶体管和第二晶体管的漏极电压，并且调节第一晶体管和第二晶体管的栅极电压，以保持第一晶体管和第二晶体管的漏极电压近似相等。 当前管理电路可以检测通过电流传感器的电流，并且调整第一晶体管和第二晶体管的栅极电压以将检测到的电流限制到电流限制。

公开(公告)号：US20140136874A1

公开(公告)日：2014-05-15

申请号：US14074278

申请日：2013-11-07

Applicant: Broadcom Corporation

Inventor： Wael DIAB ,  Sesha Panguluri

IPC: G06F1/28

CPC classification number: G06F1/28 ,  G01R31/024 ,  H04L12/40045 ,  H04L43/0852 ,  H04L43/50

Abstract: Embodiments of the present disclosure provide systems and methods for reducing discovery time in a power over Ethernet (PoE) system where the nature of a load is known or can be safely assumed. By using prior knowledge of the nature of the load, the discovery procedure can be simplified. A power source device (PSE) controller measures a port voltage to determine if an open circuit exists or if a short circuit exists. If neither an open circuit or a short circuit exists, the system can be safely powered up.

Abstract translation: 本公开的实施例提供了用于减少以太网供电（PoE）系统中的发现时间的系统和方法，其中负载的性质是已知的或可以被安全地假设。 通过使用对负载性质的先验知识，可以简化发现过程。 电源设备（PSE）控制器测量端口电压以确定是否存在开路或者存在短路。 如果没有开路或短路，系统可以安全上电。

公开(公告)号：US20140111180A1

公开(公告)日：2014-04-24

申请号：US13658769

申请日：2012-10-23

Applicant: BROADCOM CORPORATION

Inventor： Marius VLADAN ,  Sesha Panguluri

IPC: G05F3/02

CPC classification number: H04L12/413

Abstract: Systems and methods are provided for power control. In some implementations, a power control system includes a first transistor having a drain coupled to a first conductor (e.g., first pair of wires of an Ethernet cable), a second transistor having a drain coupled to a second conductor (e.g., second pair of wires of the Ethernet cable), a current sensor coupled to sources of the first and second transistors, and a current management circuit. The current management circuit may detect drain voltages of the first transistor and the second transistor, and adjust gate voltages of the first transistor and the second transistor to keep the drain voltages of the first transistor and the second transistor approximately equal. The current management circuit may detect a current through the current sensor, and adjust the gate voltages of the first transistor and the second transistor to limit the detected current to a current limit.

Abstract translation: 提供系统和方法进行功率控制。 在一些实施方式中，功率控制系统包括具有耦合到第一导体（例如，以太网电缆的第一对导线）的漏极的第一晶体管，具有耦合到第二导体（例如，第二对 以太网电缆的电线），耦合到第一和第二晶体管的源极的电流传感器，以及电流管理电路。 电流管理电路可以检测第一晶体管和第二晶体管的漏极电压，并且调节第一晶体管和第二晶体管的栅极电压，以保持第一晶体管和第二晶体管的漏极电压近似相等。 当前管理电路可以检测通过电流传感器的电流，并且调整第一晶体管和第二晶体管的栅极电压以将检测到的电流限制到电流限制。