Line receiver

Details Line receiver Line receiver

1986-12-31

1988-05-03

LaRoche, Eugene R.

Amplifiers

With semiconductor amplifying device

Including differential amplifier

330257, H03F 345

Patent

active

047423099

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.

REFERENCES:
patent: Re29700 (1978-07-01), van de Plassche
patent: 4634993 (1987-01-01), Koen
patent: 4636743 (1987-01-01), Cotreau
patent: 4636744 (1987-01-01), King et al.

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