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Binary to ternary converter

  • US 4,231,023 A
  • Filed: 03/12/1979
  • Issued: 10/28/1980
  • Est. Priority Date: 03/12/1979
  • Status: Expired due to Term
First Claim
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1. A circuit for translating ternary data being transmitted in serial binary code on one input line into ternary data coded for binary transmission on two output lines, the input data signalling a first ternary state by means of a signal alternating at an established rate for at least one cycle, a second ternary state by the presence of a signal at a first level for the period of at least one cycle, and a third ternary state by the presence of a signal at a second level for the period of at least one cycle, including(a) first means for storing the present state of the input signal during each half cycle and providing said state as an output;

  • (b) first logic means having as inputs the output of said means for storing and said input signal and providing an output when both are at said first level;

    (c) second logic means having as inputs the output of said means for storing and said input signal and providing an output when both are at said second level;

    (d) second means for storing the state of the output of said first logic means and providing said state as an output;

    (e) third means for storing the state of the output of said second logic means and providing said state as an output; and

    (f) a clock developing a clock signal occurring each half cycle synchronously with said input signal, each of said first, second and third means for storing responsive to said clock signal to store the state at their respective inputs and provide said states at their outputs, whereby, when said input signal remains at said first level for two half cycles, an output will be provided from said second means, when said input signal is at said second level for two half cycles, said third means for storing will provide an output and when said signal alternates between said first and second levels over a cycle, neither of said second and third means for storing will provide an output.

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