Apparatus for status change recognition in a multiplex channel

Details Apparatus for status change recognition in a multiplex channel Apparatus for status change recognition in a multiplex channel

1986-06-27

1988-09-20

Olms, Douglas W.

Multiplex communications

Wide area network

Packet switching

3701101, 371 69, H04J 116, H04J 314

Patent

active

047730641

ABSTRACT:
Apparatus for recognizing a logical status change between two values in a channel of an n-bit multiplex signal, incorporates an n-bit shift register controlled by the multiplex clock, and an AND gate connected to receive said input multiplex signal and an output of said shift register, with an inverter in series with one of the inputs of the AND gate. The AND gate produces a signal corresponding to a status change in a channel of the n-bit multiplex signal between two successive frames. A D-type flip-flop synchronizes the output of the AND gate with the multiplex clock.

REFERENCES:
patent: 3473130 (1969-10-01), Briggs
patent: 3550017 (1970-12-01), Whalen
patent: 3842399 (1974-10-01), Knever et al.
patent: 3862440 (1975-01-01), Suzuki et al.
patent: 3873776 (1975-03-01), Smith, Jr. et al.

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