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US 3,940,567 AGranted
Multiplex transmission system on-off signal
AssigneeNissan Motor Co., Ltd.
InventorsShinichi Iki, Hideaki Kosugi
Life of this patent
Estimating the term…
Abstract
Control pulses of highest positive level, clock pulses of negative middle level and reset pulses of lowest negative level are transmitted through one or more transmission lines. Separation of those pulses in the receiver is performed by means of simple rectifiers connected to the transmission lines. In both transmitter and receiver, binary counters and decimal decoders are utilized for repeatedly producing channel pulse sequences.
Claims15
A multiplex transmission system for transmitting a plurality of ON-OFF signals respectively corresponding to a plurality of channels through at least one transmission line, which comprises:
- a transmitter including a clock pulse generator for generating clock pulses, a first level adjuster connected to said clock pulse generator for adjusting the top level of said clock pulses at a positive or negative level and the bottom level at a negative or positive middle level, first pulse sequence generator having the same number of output lines as the channels, for repeatedly producing pulse sequences in accordance with said clock pulses, each pulse sequence consisting of the same number of channel pulses respectively appearing on said output lines in synchronizm with said clock pulses, said first pulse sequence generator producing reset pulses each appearing at a leading position of each pulse sequence and each having an utmost negative or positive level of amplitude and applying said reset pulses to said transmission line, first gate means for passing therethrough the negative or positive component of the level-adjusted clock pulses to said transmission line, and a first gate circuit connected to said output lines, for passing therethrough the positive or negative component of the level-adjusted clock pulses to said transmission line in accordance with said channel pulses and said ON-OFF signals;
- and
- a receiver including a separator for separating from each other negative and positive pulse signals on said transmission line, a reset pulse separator for separating said reset pulses from said negative pulse signal, a second level-up circuit connected to said separator for adjusting the top level of said negative pulse signal at said utmost positive or negative level second pulse sequence generator having the same number of output lines as the channels, for repeatedly producing the same pulse sequences as said pulse sequence in accordance with the separated reset pulses and the level-adjusted negative or positive pulse signal, the channel pulses respectively appearing on said output lines of said second pulses sequence generator, a plurality of second gate circuits connected to said output lines of said second pulse sequence generator, each for passing therethrough the separated positive or negative pulse signal when it is triggered by one of said channel pulses.
A multiplex transmission system for transmitting a plurality of ON-OFF signals respectively corresponding to a plurality of channels through at least two transmission lines, which comprises:
- a transmitter including a clock pulse generator for generating clock pulses, a level adjuster connected to said clock pulse generator for adjusting the top level of said clock pulses at a positive or negative level and the bottom level at a negative or positive level, first pulse sequence generator having the same number of output lines as the channels, for repeatedly producing pulse sequences in accordance with said clock pulses, each pulse sequence consisting of the same number of channel pulses respectively appearing on said output lines in synchronism with said clock pulses, said first pulse sequence generator producing reset pulses each appearing at a leading position of each first pulse sequence and applying said reset pulses to one of said transmission lines, first gate means for passing therethrough the negative or positive component of the level-adjusted clock pulses to the other transmission line, and a first gate means for passing therethrough the positive or negative component of the level-adjusted clock pulses to said the other transmission line in accordance with said ON-OFF signals;
- and
- a receiver including a separator for separating from each other negative and positive pulse signals on said one transmission line, a second level-up circuit connected to said separator for adjusting the top level of said signal at said positive or negative level, second pulse sequence generator having the same number of output lines as the channels, for repeatedly producing the same pulse sequences as said pulse sequence in accordance with said reset pulses from said one transmission line and the level-adjusted negative or positive pulse signal, the channel pulses respectively appearing on said output lines of said second pulse sequence generator, a plurality of second gate circuits connected to said output lines of said second pulse sequence generator, each for passing therethrough the separated positive or negative pulse signal when it is triggered by one of said channel pulses.
Dependencies are inferred from the claim text.