High bit rate digital data signal transmission system
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United States of America Patent
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Jan 1, 1980
Grant Date -
N/A
app pub date -
Jan 28, 1977
filing date -
Jan 28, 1977
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Apparatus is disclosed for transmitting through a transmission channel a digital data stream of the type where the position of a level transition within a bit cell determines the information content of the bit cell. As the data stream is transmitted through the transmission channel, degradation of the transitions can occur due to differring response characteristics with respect to level transitions in opposite directions. A pulse for each level transition of the data stream is generated, the pulses converted to a pair of complementary level pulses for transmission, a single level pulse is produced from the transmitted complementary level pulses when the instantaneous level of both said complementary pulses are the same during a transition and thereafter an output signal is provided having a level transition for each pulse.
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