International Business Machines Corporation

Steven Louis Makow

Todd Edward Takken

Michael Cracraft

Jay Robert Herring

Robert R Livolsi

Joseph M Hoke

Robert James Lynch

Andrew Z Muszynski

Stanley Eckert

A structure is provided for a structure for providing electrical connections across a connection interface is provided. The structure may include one or more signal connections, a plurality of reference connections, and one or more high-pass filters. One or more of the reference connections is configured to connect a first reference voltage in a first region on a first side of the interface with a second reference voltage in a second region on a second side of the interface. One or more of the reference connections in a first class of reference connections is coupled one or more of the reference voltages through the one or more high-pass filters, and low-bandwidth information is communicated across the one or more reference connections in the first class of reference connection.

Daughter card plug detection

A serial attached SCSI (SAS) system may include a host bus adaptor, a bus expander, and a multi-layer data transmission medium coupled between the host bus adaptor and the bus expander. The multi-layer data transmission medium may include a first microstrip structure located at a top surface portion of the multi-layer data transmission medium and a first stripline structure located within a first internal portion of the multi-layer data transmission medium. The microstrip structure provides, among other things, a repeaterless high-speed serial communications link between the host bus adaptor and the bus expander.

High speed differential wiring strategy for serially attached SCSI systems

A transmission line for carrying digital signals is provided with auxiliary line drivers at the receiver end, which are used in combination with the data line driver at the transmitting end to apply a sequence of sets of test voltages onto the line. The voltage resulting at the receiver input is used to detect open signal conductors and/or shorts in the receiver.

Method and apparatus for testing a signal line

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Poughkeepsie, NY, United States of America

Steven Louis Makow