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Information processing system using threshold passive modification

  • US 4,254,474 A
  • Filed: 08/02/1979
  • Issued: 03/03/1981
  • Est. Priority Date: 08/02/1979
  • Status: Expired due to Term
First Claim
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1. An information processing system comprising, in combination:

  • a. a plurality (n) of input terminals 1, 2 . . . ,j . . . , N adapted to receive N input signals s1, s2 . . . ,sj . . . ,sN, respectively;

    b. a plurality (n) of output terminals 1, 2 . . . , i . . . , n adapted to present n output responses r1,r2 . . . ,ri . . . , rn, respectively;

    c. a plurality of junction elements, called mnemonders, each mnemonder coupling one of said input terminals (input j) with one of said output terminal (output i) and providing a transfer of information from input j to output i in dependence upon the signal sj appearing at the input j and upon the mnemonder transfer function Aij ; and

    d. means for modifying the transfer function Aij of at least one of said mnemonders, when in a learning mode, in dependence upon the product of at least one of said input signals and one of said output responses;

    wherein modifications to the transfer functions of the mnemonders, when in a learning mode, take the form;

    
    
    space="preserve" listing-type="equation">A.sub.ij (t)=γ

    A.sub.ij (t-1)+δ

    A.sub.ij (t) where δ

    Aij (t) has the form;

    
    
    space="preserve" listing-type="equation">δ

    A.sub.ij (t)=η

    (r.sub.i)r.sub.i s.sub.jwhere Aij (t) is the new (modified) transfer function, Aij (t-1) is the previous transfer function, γ

    is a decay constant in the range 0≦

    γ



    1 and η

    is a variable learning constant that is dependent upon the output ri.

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