Michael T Paul

US Patent:

61740675, Jan 16, 2001

Filed:

Apr 21, 1998

Appl. No.:

9/064046

Inventors:

Larry E. Thrasher - Camarillo CA
Mihail V. Mateescu - Los Angeles CA
Michael F. Paul - Camarillo CA

Assignee:

PacFab, Inc. - Moorpark CA

International Classification:

F21V 3300

US Classification:

362101

Abstract:

A lighting system (100) comprises a nonconductive niche (110) that is free of ground connections and bond connections, and a lighting fixture (108) having no conductive components, except for a current-carrying circuit (112). Snap fasteners (124) secure the lighting fixture to the niche, and lamp sockets are arranged to radiate multiple light beams from halogen lamps in different directions. An electronic isolation transformer (200), which supplies a two-wire, ungrounded source of power to the halogen lamps, presents a linear load and a conduction path to a dimmer switch, and inhibits switching in the electronic isolation transformer when an AC signal (204) applied to the electronic isolation transformer is within a predetermined range. A nonconductive junction box (600) houses the electronic isolation transformer and physically isolates a high-voltage, low-frequency power source (106) from the low-voltage, high-frequency power source in the junction box.

US Patent:

20220321366, Oct 6, 2022

Filed:

Mar 30, 2022

Appl. No.:

17/708777

Inventors:

Michael T. Paul - Goleta CA, US
Heath Dixton Stewart - Santa Barbara CA, US
Andrew J. Gardner - Santa Clara CA, US

International Classification:

H04L 12/10

Abstract:

A network node device for coupling to a network via a shared link that carries power and data. The network node device includes: one or more data transceivers to transmit and receive data over the shared link; physical layer circuitry (PHY) to transmit and receive data with the one or more data transceivers;and a galvanic isolation barrier coupled between the PHY and the one or more data transceivers, wherein the PHY transmits and receives the data with the one or more data transceivers over the galvanic isolation barrier.

US Patent:

20150326403, Nov 12, 2015

Filed:

May 6, 2015

Appl. No.:

14/705849

Inventors:

- Milpitas CA, US
Jeffrey Heath - Santa Barbara CA, US
Heath Stewart - Santa Barbara CA, US
Michael Paul - Santa Barbara CA, US

International Classification:

H04L 12/10

Abstract:

A PSE includes a PSE controller that performs a handshaking routine with any PDs connected to the data wire pairs and spare wire pairs and applies power to the data wire pairs and spare wire pairs, via a switch, if certain conditions are met. Two different levels of currents are supplied to different terminals of the PSE controller that are connected to the data wire pairs and the spare wire pairs, and the resulting voltages are measured. The voltages are used to determine the PD impedances at the ends of the data wire pairs and spare wire pairs to determine whether a PD is connected to the data wire pair, whether another PD is connected to the spare wire pair, or whether a single PD is connected to both the data wire pairs and the spare wire pairs.

US Patent:

20140372773, Dec 18, 2014

Filed:

Jan 8, 2014

Appl. No.:

14/150150

Inventors:

- Milpitas CA, US
David Dwelley - Santa Barbara CA, US
Heath Dixon Stewart - Santa Barbara CA, US
Michael Thomas Paul - Santa Barbara CA, US

Assignee:

Linear Technology Corporation - Milpitas CA

International Classification:

G06F 1/26

US Classification:

713300

Abstract:

Power Sourcing Equipment (PSE) provides a PoE supply voltage over data wires to a Powered Device (PD). A PSE controller controls a first FET that couples the PoE voltage to the data wire pairs and controls a second FET that couples the data wire pairs to the spare wire pairs. Upon powering up, the PSE controller keeps the two FETs open and performs a detection routine on any devices connected to the data pairs and spare pairs. If a PoE-compatible PD is detected as being coupled to the data pairs, the first switch is closed. If it is determined that the PoE voltage should also be coupled to the spare pairs, the second FET is also closed. The method prevents the PoE voltage from being applied to the spare pairs when the device connected to the spare pairs is not PoE compatible and maintains backwards compliance with IEEE PoE PDs.

US Patent:

20140129850, May 8, 2014

Filed:

Nov 5, 2012

Appl. No.:

13/668943

Inventors:

- Milpitas CA, US
Michael Paul - Santa Barbara CA, US

Assignee:

LINEAR TECHNOLOGY CORPORATION - Milpitas CA

International Classification:

G06F 1/26

US Classification:

713300

Abstract:

A system for combining power to a load in a Powered Device (PD) using Power Over Ethernet (PoE) receives power from a first channel and power from a second channel, via four pairs of wires. A MOSFET bridge for each channel is initially disabled. A bridge controller IC simultaneously senses all the voltages and controls the bridge MOSFETs. The bridge controller IC also contains a first PoE handshaking circuit. A second PoE handshaking circuit is external to the bridge controller IC and operates independently. The body diodes in the MOSFET bridge initially couple the first channel to the second PoE handshaking circuit while isolating the second channel. The second handshaking circuit then couples the first channel to the load. The first handshaking circuit then carries out a PoE handshaking routine for the second channel. Ultimately, the bridge controller controls the bridge MOSFETs to couple both channels to the load.