Digital data and orderwire combiner apparatus
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United States of America Patent
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-
Aug 30, 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 digital data and orderwire combiner employs a first and a second inverting gate amplifiers. The first amplifier receives the orderwire signal which is a low rate digital signal, while the second amplifier receives the data signal which is of a higher rate. The amplifiers have a common ground return where current through the amplifiers is directed through a resistive impedance network. The amplifiers as coupled together providing a 3-level amplitude modulated signal indicative of the combined data and orderwire signal. In order to reduce jitter, a portion of one of the signals is directed from one amplifier to the other. The configuration assure low jitter operation while producing reliable voltage levels indicative of 3-level amplitude modulation.
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