Device and method for evaluating logarithms

Details Device and method for evaluating logarithms Device and method for evaluating logarithms

1993-02-17

1994-04-05

Malzahn, David H.

Boots, shoes, and leggings

G06F 102

Patent

active

053011384

ABSTRACT:
A logarithm of an input value is computed utilizing a function generator to generate a first logarithm of an approximation value of the input value, scaled to a natural logarithm value where the first logarithm is not a natural base logarithm, and then combined with a correction value, obtaining a natural base logarithm of the input value. An error value, related to the input value and the approximation value, is generated and is utilized in a specified power series to determine the correction value. The natural base logarithm obtained is scaled by a natural base logarithm of a desired base of a desired output logarithm, thereby determining the desired output logarithm of the input value that has the desired base.

REFERENCES:
patent: 3631230 (1921-12-01), Chen
patent: 4062014 (1977-12-01), Rothgordt et al.
patent: 4089060 (1978-05-01), Mitchell
patent: 4583180 (1986-04-01), Kmetz
patent: 4626825 (1986-12-01), Burleson
patent: 4791403 (1988-12-01), Mitchell et al.

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