Patent
1995-08-11
1998-01-06
Lim, Krisna
395311, G06F 1340
Patent
active
057064474
ABSTRACT:
A modular computer bus providing a system for automatically maintaining proper bus termination. A module connector is located at on end of the bus. A switch device is located at the end of the bus as close as possible to the connector. The switch device couples a termination device to the end of the bus when the switch device is in an on state. The switch device is in the on state when no module is present in the connector and in an off state when a module, such as a processor module, is present in the connector. When the switch device is in the off state, the termination device is not coupled to the bus. Instead the end of the bus is terminated by a termination device on the module. Thus, computer bus is correctly terminated automatically when a module is inserted into or removed from the connector. Thus a bus structure is provided for implementing a bus standard while providing modularity and automatically maintaining proper bus termination. The superior flexibility, upgradeability and serviceability benefits of a modular bus system are achieved without incurring the increased damage risk, cost, and user confusion disadvantages of prior termination techniques.
REFERENCES:
patent: 5426739 (1995-06-01), Lin et al.
patent: 5454081 (1995-09-01), Thome
patent: 5467453 (1995-11-01), Kocis
patent: 5550990 (1996-08-01), Keener et al.
patent: 5553250 (1996-09-01), Miyagawa et al.
Dell USA L.P.
Garrana Henry N.
Kahler Mark P.
Lim Krisna
Roberts Diana L.
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