Patent Number: 6,294,942

Title: Method and apparatus for providing self-terminating signal lines

Abstract: A self-terminating module is provided that at least partially terminates a signal line when the self-terminating module is coupled thereto. The self-terminating module comprises an internal non-self-terminating module directly coupled to an internal termination circuit. Preferably an active internal termination circuit is employed. A pass circuit may be coupled between the internal termination circuit and the internal non-self-terminating module so as to pass a received signal therebetween with fewer reflected signal contributions. When a pass circuit is employed, a delay circuit responsive to a trigger signal controls signal transfer between the internal termination circuit and the internal non-self-terminating module. One or more self-terminating modules may be coupled to a signal line and the termination impedance of each module is selected to provide adequate signal line termination without significantly loading the signal line when one or more of the self-terminating modules are coupled thereto.

Inventors: Bertin; Claude L. (South Burlington, VT), Bonaccio; Anthony R. (Shelburne, VT), Kalter; Howard (Colchester, VT), Tonti; William R. (Essex Junction, VT)

Assignee: International Business Machines Corporation

International Classification: H04L 25/02 (20060101); H03K 005/08 (); H03L 005/00 ()

Expiration Date: 09/25/2018