Orderwire detector for communication systems
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United States of America Patent
Stats
-
Jun 21, 1988
Grant Date -
N/A
app pub date -
Oct 1, 1986
filing date -
Oct 1, 1986
priority date (Note) -
Expired
status (Latency Note)
Importance
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.
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