Electronic digital logic circuitry – Interface – Current driving
Patent
1993-08-12
1997-07-08
Westin, Edward P.
Electronic digital logic circuitry
Interface
Current driving
326 30, 326 90, H03K 190175
Patent
active
056465521
ABSTRACT:
The data transmission device is used for transmitting data sent from a first apparatus to a second apparatus through a system interface and/or for receiving data sent from the second apparatus to the first apparatus through the system interface. The data transmission device comprises a cutting off unit for substantially cutting off a path between the first apparatus and the system interface while a signal being output from the first apparatus has a first predetermined signal level.
REFERENCES:
patent: 4987319 (1991-01-01), Kawana
patent: 5136187 (1992-08-01), Ceccherelli et al.
patent: 5374858 (1994-12-01), Elmer
patent: 5438281 (1995-08-01), Takahashi et al.
Ricoh & Company, Ltd.
Santamauro Jon
Westin Edward P.
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