Line receiver
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United States of America Patent
Stats
-
May 3, 1988
Grant Date -
N/A
app pub date -
Dec 31, 1986
filing date -
Dec 31, 1986
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An improved line receiver with high common mode rejection is operable at voltages above the power supply voltage (VCC) as well as below ground. Input resistors provide high input impedence as well as means through which current summing of current mirror currents at the input transistor base nodes is translated into voltage drops which boosts the common mode rejection range of the circuit. Built-in hysteresis circuitry ensures proper detection of non-common mode signals. The high input impedence and high sensitivity allow multiple receivers of the type to be connected in parallel across a common bus for interrogation by a remote system. The preferred embodiment of the present invention is implemented in integrated circuit technology.
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