Pulse or digital communications – Cable systems and components – Transformer coupling
Patent
1996-06-03
1998-08-25
Chin, Stephen
Pulse or digital communications
Cable systems and components
Transformer coupling
375377, H04B 300
Patent
active
057990409
ABSTRACT:
A data transmission method entails differentially transmitting low-pass filtered first outgoing data to and through an isolation transformer at a first data rate. Second outgoing data is differentially transmitted to and through the transformer in the same direction as the first outgoing data but at a second data rate different from, typically greater than, the first data rate. The so-transmitted first and second outgoing data is coupled from the transformer to a communication cable during different time intervals. A related data reception method involves coupling incoming data from a communication cable to and through the isolation transformer and providing the so-coupled incoming data differentially along data transfer paths that extend from the transformer to and through where data moving at the first data rate is received to where data moving at the second data rate is received such that the data transfer paths have a largely constant characteristic impedance.
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Chin Stephen
Ghebretinsae T.
Meetin Ronald J.
National Semiconductor Corporation
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