Interactive communication circuit for selecting a transmitting circuit to generate signals
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United States of America Patent
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Sep 29, 1998
Grant Date -
N/A
app pub date -
Jul 24, 1995
filing date -
Aug 26, 1994
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Preventing signals from undesirably entering and enabling interactive communication. Signals from a main line or branch line are received by receiving circuits. Signal detecting circuits detect signals, and then transmit the detected signals (detection B and detection A) to a first-arrival judging circuit. The first-arrival judging circuit determines which signal is the first arrival between the signals from the detecting circuits, and then allows one of transmitting circuits to output a signal. Accordingly, only one of the transmitting circuits generates signals, preventing signals of the other transmitting circuit from entering and enabling interactive communication.
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