Method and apparatus for detecting a cable in a redriver

Details Method and apparatus for detecting a cable in a redriver Method and apparatus for detecting a cable in a redriver

2011-07-26

2011-07-26

Cho, James (Department: 2819)

Electronic digital logic circuitry

Signal sensitivity or transmission integrity

C326S038000, C710S301000

Reexamination Certificate

active

07986159

ABSTRACT:
With conventional redrivers used for external Serial Advanced Technology Attachment (eSATA), there is no ability to indicated to a host that an external device (like a hard disk drive) is not present. As a result, power is consumed by a host because of nearly continual transmission of communication reset signals. Here, a redriver has been provided that includes a cable disconnect terminal and circuitry within a controller that is able to detect whether an external device is present. This redriver enables a host to be powered down or placed in a low power mode while also enabling the use an eSATA compliant connector.

REFERENCES:
patent: 6906549 (2005-06-01), Schoenborn et al.
patent: 7545176 (2009-06-01), Agarwal et al.
patent: 7657686 (2010-02-01), Paquette et al.
patent: 7859299 (2010-12-01), Gay et al.

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