High impedance transceiver for tapped bus transmission systems

Details High impedance transceiver for tapped bus transmission systems High impedance transceiver for tapped bus transmission systems

H - Electricity

04

L

340/97

H04L 5/16 (2006.01) H04L 25/49 (2006.01)

Patent

CA 1150794

-1- ABSTRACT HIGH IMPEDANCE, MANCHESTER (3 STATE) TO TTL (2 WIRE, 2 STATE) TRANSGEIVER FOR TAPPED BUS TRANSMISSION SYSTEMS An electrically and mechanically modular design of a high impedance, passive transceiver is disclosed for use in distributed, serial transmission systems to provide half duplex interfacing to multiple users with minimum loading and reflection. The transceiver is selectively operable in either of two modes: a receive mode for receiving low-level serial, bi-phase (3 state) Manchester coded signals and transmitting (2 wire, 2 state) signals at transistor-transis- tor logic (TTL) levels; and a transmit mode for receiving (2 wire, 2 state) signals at TTL levels and transmitting the low-level, serial bi-phase, (3 state) signals on the bus.

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