Data communications system
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United States of America Patent
Stats
-
Jul 16, 1991
Grant Date -
N/A
app pub date -
Oct 17, 1989
filing date -
Oct 24, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A data communications system includes a high impedance input circuit, which serves as an input circuit linking between a communications interface and a data terminal equipment, and a power supply circuit which obtains a receiving signal from an input terminal of the high impedance input circuit and draws electric power from the receiving signal to supply to the data communications system.
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