Data link module for time division multiplexing control systems

Details Data link module for time division multiplexing control systems Data link module for time division multiplexing control systems

1995-11-30

1997-11-25

Safourek, Benedict V.

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Synchronizing

327198, 370546, H03L 700

Patent

active

056916590

ABSTRACT:
A programmable data link module (32) for use in a time division multiplexing control system (30) having a plurality of modules interconnected by a bus (40) for passing control signals between data link modules on a serial multiplex basis. Each module includes an integrated circuit (80) having signal conditioning circuits (180, 186 and 188) including a programmable hysteresis circuit (126), a power on reset delay circuit (190), a safety input inhibit circuit (220), a clock loss detect circuit (240), a safety output protection circuit (262), a data verifier (260), a polarity selector for a third output terminal (350), an input synchronizer (182 and 184), a combined mode/sync output terminal (110), a multiplex clock output terminal (108), a programing circuit (232) for accepting programing over the clock bus (44) and data bus (46), input/output word extender circuits (104, 106), a high voltage protection circuit (420) including a transistor (600) and a data bus integrity checker (630).

REFERENCES:
patent: 4052566 (1977-10-01), Mackay
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patent: 4435706 (1984-03-01), Callan
patent: 4682168 (1987-07-01), Chang et al.
patent: 4808994 (1989-02-01), Riley
patent: 5043911 (1991-08-01), Rashid
patent: 5504737 (1996-04-01), Itchii et al.
patent: 5513175 (1996-04-01), Ichii et al.

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