H - Electricity – 04 – L
Patent
H - Electricity
04
L
354/67
H04L 25/48 (2006.01) H04L 5/14 (2006.01) H04L 7/00 (2006.01) H04L 25/49 (2006.01) H04Q 9/14 (2006.01)
Patent
CA 1244947
ABSTRACT A DATA SYSTEM A data system for transmitting multi-state data streams between a data transmitting station and a data receiving station, coupled together by a data transmission line. Associated with the data transmitting station is an encoder for encoding the data stream prior to transmission and associated with the data receiving station is a decoder for decoding the received signals. The encoder comprises signal generating means which selectively generates a first waveform corresponding to the integral of a positive pulse having a negative d.c. offset and a second waveform corresponding to the integral of a negative pulse having a positive d.c. offset. The time average of each waveform and its associated d.c. offsets is substantially zero. The encoder further comprises means for reading the multi-state data stream and for outputting a composite waveform onto the data transmission line consisting of a respective combination of the first and second waveforms for each state read from the multi-state data stream. The decoder comprises a differentiating circuit.
494399
Gowling Lafleur Henderson Llp
Keystone International Inc.
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