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Logic circuit made of biomaterials such as protein films

  • US 4,783,605 A
  • Filed: 07/02/1987
  • Issued: 11/08/1988
  • Est. Priority Date: 07/11/1986
  • Status: Expired due to Term
First Claim
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1. A logic circuit having an output terminal and at least one input terminal, which comprises:

  • a first electron transmission protein film made of a first electron transmission protein;

    a second electron transmission protein film made of a second electron transmission protein having a redox potential different from that of said first electron transmission protein and joined on top of said first electron transmission protein film;

    a third electron transmission protein film made of a third electron transmission protein having a redox potential different from that of said second electron transmission protein and joined on top of said second electron transmission protein film;

    a source electrode connected to said first electron transmission protein film;

    a gate electrode having an electrical influence on said second electron transmission protein film;

    a drain electrode connected to said third electron transmission protein film;

    said first, second, and third electron transmission films being coupled so as to form a driving transistor network in which a series connection of at least one circuit group consisting of at least one transistor with its drain and source connected in parallel to a pair of common drain and source terminals;

    said common drain terminal of the first circuit group in said series connection being connected to said output terminal;

    said common source terminal of the last circuit group in said series connection being connected to a second power supply having a potential lower than that of said first power supply;

    the gate of said transistor in said circuit group being connected to said input terminal;

    said load transistor and said driving transistor network being of the same type; and

    threshold voltages of said load and driving transistor network being substantially the same.

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