Voltage swing detection circuit for hot plug event or device...

Details Voltage swing detection circuit for hot plug event or device... Voltage swing detection circuit for hot plug event or device...

2006-03-07

2006-03-07

Sircus, Brian (Department: 2836)

Electricity: electrical systems and devices

Safety and protection of systems and devices

With specific voltage responsive fault sensor

Reexamination Certificate

active

07009827

ABSTRACT:
In some embodiments, a device detection circuit for detecting whether a device is coupled to a differential link, a transmitter (e.g., a transceiver) including such a circuit, and a system including such a transmitter. Preferably, the device detection circuit includes two branches (each branch including a switch), a current source that causes current to flow through either branch, or to be shared by both branches, depending on the state of each switch, and a voltage swing detector configured to detect the voltage between a node (of one branch) and a node (of the other branch) during a device detection operation. In other embodiments, the invention is a device (e.g., a receiver) including a differential termination that can be coupled to a differential link, and an electrical overstress protection circuit coupled to the termination and configured to protect the device against electrical stress during a hot plug event.

REFERENCES:
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APT Technologies, Inc., et al., “Serial ATA: High Speed Serialized AT Attachment”,Revision 1.0, Aug. 29, 2001, pp. 1-306.

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