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US 2012/0250199 A1Published application
Power over ethernet electrostatic discharge protection circuit
AssigneeBroadcom Corporation
InventorAgnes WOO
Life of this patent
Estimating the term…
Abstract
A Power over Ethernet electrostatic discharge protection circuit has a diode with an anode coupled to an Ethernet port and a cathode coupled to a non-collapsible clamp. The non-collapsible clamp is coupled to the cathode and ground. A transistor can be added, with the transistor drain coupled to the diode anode and the transistor source is coupled to ground.
Claims20
A Power over Ethernet (PoE) electrostatic discharge (ESD) protection circuit, comprising:
- an Ethernet port;
- a diode including:
- a cathode;
- and
- an anode coupled to said Ethernet port;
- and
- a non-collapsible clamp coupled between said cathode and ground.
4 more elements
A Power over Ethernet (PoE) electrostatic discharge (ESD) protection circuit, comprising:
- a plurality of Ethernet ports;
- a plurality of diodes, wherein each one of the plurality of diodes is associated with one of the plurality of Ethernet ports, wherein each one of the plurality of diodes comprises a cathode and an anode, and wherein each anode is coupled to its associated Ethernet port;
- a bus connected to the cathode of each one of the plurality of diodes;
- and
- a non-collapsible clamp coupled between the bus and a ground.
2 more elements
A method comprising:
- receiving an electrostatic discharge from an Ethernet port;
- coupling the electrostatic discharge through a diode to a capacitor via a bus;
- and
- limiting, by a non-collapsible clamp, a voltage on the capacitor.
1 more element
Dependencies are inferred from the claim text.