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Approximating functions

  • US 10,402,167 B2
  • Filed: 03/12/2019
  • Issued: 09/03/2019
  • Est. Priority Date: 05/01/2014
  • Status: Active Grant
First Claim
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1. A binary logic circuit for approximating a mathematical function over a predefined range as a series of linear segments, each linear segment extending between a pair of break points and having a gradient and a base value, the binary logic circuit comprising:

  • an input for receiving an input variable in the predefined range;

    a plurality of logic chains each comprising;

    a binary multiplier configured to perform multiplication by a gradient, anda binary adder configured to add a base value to an input or output of the binary multiplier; and

    selection logic configured to select one of the logic chains in dependence on the input variable so as to provide, for the received input variable, an approximate value of the mathematical function,wherein each of the break points has a minimum extended Hamming weight which is less than or equal to a threshold value.

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