Duplex microphone communication system
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United States of America Patent
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-
Sep 1, 1987
Grant Date -
N/A
app pub date -
Mar 11, 1986
filing date -
Mar 11, 1986
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A full duplex microphone communications system permitting simultaneous bi-directional communications for a two conductor shielded microphone cable. A talkback signal is injected by an encoder at one end using a balanced input to transmit a common-mode signal on the two conductors of the microphone cable using the shield as a ground reference. This signal is then decoded at the other end of the cable by decoding circuitry which covers the common-mode talkback signal.
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