Communication apparatus
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United States of America Patent
Stats
-
Dec 30, 1986
Grant Date -
N/A
app pub date -
May 22, 1985
filing date -
Jun 4, 1984
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A communication apparatus for receiving both power and a sensor signal over the same transmission line having a first variable impedance element and a receiving impedance element connected in series across the transmission line, a second variable impedance element and a series impedance element connected in series across the transmission line, and a control circuit for controlling the first variable impedance element to maintain the transmission line voltage constant and for controlling the second variable impedance element to maintain the current flowing through the series impedance element constant, the control circuit simultaneously controlling the first and second variable impedance elements to maintain the current flowing through the series impedance element constant while transmitting data over the transmission line.
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