Patents Assigned to K. Ushiku & Co.
  • Basic circuitry particularly for construction of multivalued logic systems
    Patent number: 4814644
    Abstract: Disclosed are basic circuits operable in a current mode in multivalued logic circuit systems, analog circuit systems and the like. Examples of the basic circuits are a successor, quantizer, adder, substracter, divider, multiplier, decoder, literal circuit, equivalence circuit, bilateral T-gate, complement literal circuit and h operator circuit. These basic circuits are realized by using floating threshold switching circuits, floating window switching circuits, threshold SPDT switching circuits, and the like.
    Type: Grant
    Filed: January 22, 1986
    Date of Patent: March 21, 1989
    Assignee: K. Ushiku & Co.
    Inventor: Takeshi Yamakawa