Arithmetic unit for approximating function

Details Arithmetic unit for approximating function Arithmetic unit for approximating function

2004-08-25

2008-12-30

Do, Chat C (Department: 2193)

Electrical computers: arithmetic processing and calculating

Electrical digital calculating computer

Particular function performed

Reexamination Certificate

active

07472149

ABSTRACT:
A look-up table outputs an initial value, an inclination of a straight line and a correction value in response to an entry-of a high-order bit string of an operand. An offset circuit calculates an offset of the low-order bit string. A correction circuit outputs the initial value obtained by adding the correction value to at least one of the initial value and the inclination when the correction is necessary. A multiplier calculates a product of the inclination and the offset. An adder calculates the sum of the initial value and the product.

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Andrew S. Noetzel, “An Interpolating Memory Unit for Function Evaluation: Analysis and Design”, IEEE Transactions on Computers, vol. 38, No. 3, Mar. 1989, pp. 377-384.

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