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US 7,679,878 B2Granted
Capacitor sharing surge protection circuit
AssigneeBroadcom Corporation
InventorLouis Maggiolino
Life of this patent
Estimating the term…
Abstract
A capacitor sharing surge protection circuit for protecting multiple ports from harmful energy surges, such as electrostatic discharge (ESD) and cable discharge events (CDE), is provided. The protection circuit includes a plurality of diodes with respective cathodes and anodes. Each anode of the plurality of diodes is coupled to one of the plurality of ports. A bypass capacitor is coupled between the cathodes of the plurality of diodes and ground. In an embodiment, a bulk capacitor is further coupled between the cathodes of the plurality of diodes and ground.
Claims14
A protection circuit, comprising:
- a plurality of Ethernet ports that each comprise a transmit and receive port;
- a plurality of diodes, each diode including a cathode and an anode, wherein each anode is coupled to only one of the plurality of Ethernet ports;
- a transient-voltage-suppression (TVS) diode coupled between the cathodes of the plurality of diodes and ground and configured to provide a common discharge path for surge events on any one of the plurality of Ethernet ports;
- and
- a bypass capacitor coupled between the cathodes of the plurality of diodes and ground.
2 more elements
A protection circuit, comprising:
- a plurality of ports;
- a plurality of diodes, each diode including a cathode and an anode, wherein each anode is coupled to a single one of the plurality of ports;
- a bulk capacitor coupled between the cathodes of the plurality of diodes and ground;
- and
- a bypass capacitor coupled between the cathodes of the plurality of diodes and ground.
2 more elements
Dependencies are inferred from the claim text.