Interface for use between two communication units
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United States of America Patent
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Sep 22, 1992
Grant Date -
N/A
app pub date -
Jun 7, 1990
filing date -
Oct 10, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An interface for use between a first communication unit having a two-wire connection and a second communication unit having a single-wire connection includes a comparator (IC1) having a fixed potential (V.sub.(-)) at its inverting input and having its output connected to one of the two-wire connections while the potential (V.sub.(+)) applied to the non-inverting input is determined by a switching network (transistors T1 and T2 and resistors R2, R3, R4, R7, R12) responsive to the potential on the second of the two-wire connections and on the single-wire connection to enable the first communication unit to receive data from the second communication unit but not to receive self-transmitted data.
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