Orderwire detector for communication systems

Details Orderwire detector for communication systems Orderwire detector for communication systems

1986-10-01

1988-06-21

Masinick, Michael A.

Multiplex communications

Wide area network

Packet switching

307510, 370 76, 379 93, H04B 900

Patent

active

047529261

ABSTRACT:
A orderwire detector circuit operates to identify whether an orderwire signal is of a digital or of an analog format. The orderwire signal is conveniently combined with a high speed data signal. The circuit operates to filter the high speed data signal from the orderwire signal and then square and retime the orderwire signal by means of a stable clock source. The orderwire signal is delayed by one bit and these bits are then compared to determine whether or not over a long period a certain voltage exists. If the proper voltage level exists after a plurality of samples, then it is assumed that the orderwire signal is a digital signal. Depending on the voltage detected, at the end of a predetermined sampling period, one can therefore discriminate between a signal orderwire signal or a analog orderwire signal.

REFERENCES:
patent: 3767860 (1973-10-01), Brown
patent: 3851112 (1974-11-01), Kusan
patent: 3927260 (1975-12-01), Amundson et al.
patent: 4449218 (1984-05-01), Strehl

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