Digital signal transmission system and equipment
AssigneeKabushiki Kaisha Tokai Rika Denki Seisakusho
InventorsHiroshi Ohashi, Takashi Kimura
Life of this patent
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Abstract
A digital signal transmission system and equipment therefor in which digital signals sequentially sent out from an encoder side are compared with set values in each of comparators at a decoder side, for sending out signals from the comparators when the values of the digital signals are larger than the values set in the comparators and for suspending signals from all of the comparators if the values of the digital signals are smaller than those set in the comparators, while output from the comparator having the set value nearest to the signal value is utilized for inverting other comparators so as to suspend outputs from these other comparators for effecting stable signal transmission through simple construction.
Claims13
A system for transmission of digital signals comprising
- timing pulse generator means for generating sequential timing pulse signals in a repetitive time frame and for applying the generated timing pulse signals only to a switching means;
- a multiplex highway for carrying voltage signals;
- a plurality of voltage signal generating means each capable of selectively generating a respective voltage signal of different voltage level;
- said switching means being responsive to said sequential timing pulse signals for sequentially connecting said voltage signal generating means to one end of said multiplex highway;
- and
- decoding means connected to the other end of said multiplex highway for detecting the level of the voltage signals received on said multiplex highway, said decoding means operating independently of said timing pulse generator means.
A system for transmission of digital signals comprising
- timing pulse generator means for generating sequential timing pulse signals in a repetitive time frame;
- a multiplex highway for carrying data signals;
- a voltage source connected to one end of said multiplex highway through an impedance;
- a plurality of switch circuits connected in parallel to the other end of said multiplex highway, each switch circuit including in series a first selectively operable switch, a second switch responsive to a respective one of said sequential timing pulse signals and means for adjusting the voltage drop across said switch circuit to a level different from that of the other switch circuits;
- and
- decoding means connected to said one end of said multiplex highway for detecting the level of the voltage carried by said multiplex highway to identify the first switches in said swtich circuits which are selectively operated, said timing pulse generator means and said decoding means operating independently of said timing pulse generator and said timing pulse generator means applying the generated timing pulse signals only to said second switches.
A method of transmission of digital signals on a multiplex highway comprising the steps of
- sequentially applying to one end of said multiplex highway a plurality of digital signals whose voltage levels differ from one another, with said digital signals in time correspondence with a plurality of sequential time pulse signals;
- comparing the digital signals received at the other end of said multiplex highway with each of a plurality of reference voltages of different level which are correlated to the levels of said digital signals;
- and
- identifying the reference voltage which compares most closely with the received digital signal, wherein the comparing and identifying steps are performed independently of the sequential time pulse signals.
Dependencies are inferred from the claim text.