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D Matthew Landry, John Gammel: Circuit device and method of current limit-based disconnect detection. Silicon Laboratories, Cesari & Reed, R Michael Reed, May 6, 2014: US08716886 (1 worldwide citation)

In a particular embodiment, a power sourcing equipment (PSE) device includes at least one network port adapted to couple to a powered device to provide power and optionally data to the powered device via a network cable. The PSE device further includes a current limiter circuit coupled to the at lea ...


12
D Matthew Landry, Russell J Apfel: System and method of classification in power over ethernet systems. Silison Laboratories, Cesari & Reed, R Michael Reed, February 12, 2013: US08375231 (1 worldwide citation)

A method is disclosed that includes receiving a classification voltage at a powered device from a network. The classification voltage includes a baseline voltage level that is below an operating voltage range of the powered device and includes a sequence of distinct signal elements derived from the ...


13
D Matthew Landry: Circuit device and method of suppressing a power event. Silicon Laboratories, Cesari & Reed, R Michael Reed, January 5, 2016: US09231402

A circuit device includes a diode bridge having a first power input and a second power input and having a first output terminal and a second output terminal. The diode bridge includes a plurality of diodes and a respective plurality of diode bypass elements associated with the plurality of diodes. T ...


14
D Matthew Landry, Russell J Apfel: System and method of classification in power over ethernet systems. Silicon Laboratories, Westman Champlin & Kelly Pa, July 3, 2008: US20080162973-A1

A power sourcing equipment (PSE) device is disclosed that includes an interface adapted to communicate with a powered device via wire pairs of a cable, a power supply circuit adapted to provide power to the interface, and device detection logic to detect the powered device coupled to the interface. ...


15
Alejandro Velez, D Matthew Landry: Powered device including a multi-use detection resistor. Silicon Laboratories, Westman Champlin & Kelly Pa, January 1, 2009: US20090001956-A1

In a particular embodiment, a method includes receiving a powered device (PD) detection signal at a PD from a powered network and applying the PD detection signal to an external resistor to provide a detection signature to the powered network. Further, the method includes receiving a PD classificati ...


16
D Matthew Landry, Russell J Apfel: System and method of classification in power over Ethernet systems. Silicon Laboratories, Toler Schaffer, December 27, 2007: US20070296394-A1

A method is disclosed that includes receiving a classification voltage at a powered device from a network. The classification voltage includes a baseline voltage level that is below an operating voltage range of the powered device and includes a sequence of distinct signal elements derived from the ...


17
Richard B Webb, D Matthew Landry: System and method of detection of power loss in powered ethernet devices. Silicon Laboratories, Toler Schaffer, December 6, 2007: US20070283173-A1

A powered device includes a power supply input, a diode bridge, and a power loss detector. The power supply input is responsive to an external power source. The diode bridge has an input to receive at least one power supply input. The power loss detector includes an input responsive to the power sup ...


18
D Matthew Landry, Russell J Apfel: Powered device including a detection signature resistor. Silicon Laboratories, Toler Law Group, January 31, 2008: US20080024106-A1

A method is provided that includes receiving a detection voltage at a powered device from a powered network, applying the detection voltage to an external resistor to provide a detection signature to the powered network, and applying a reference voltage to the external resistor to generate a referen ...


19
D Matthew Landry, Russell J Apfel: Powered device including a classification signature resistor. Silicon Laboratories, Toler Schaffer, January 3, 2008: US20080005598-A1

A method is provided that includes receiving a classification voltage at a powered device from a powered network and providing a classification signature to the powered network in response to receiving the classification voltage to specify a power requirement of the powered device. The method furthe ...


20
John Gammel, Richard B Webb, D Matthew Landry: System and method of surge protection in a powered device. Silicon Laboratories, Toler Schaffer, January 17, 2008: US20080013243-A1

A powered device includes a first supply terminal, a second supply terminal, and at least one input pin coupled to the first supply terminal. The powered device further includes an external capacitor having a first terminal coupled to the first supply terminal, a switch coupled to the second supply ...