APPROXIMATING_COSINES

Published:2009/7/7 22:34:00 Author:May | From:SeekIC

Analog Devices 433 multiplier/divider IC approximates cosine of angle to better than 1%, by computing nonintegral exponents. 0nly one opamp is needed. Approximation uses arbitrary exponent as one term of cosineθplus a linear term and a constant term, as described in article.-D. H. Sheingold, Approximate Analog Functions with a Low-Cost Multiplier/Divider, EDN Magazine, Feb. 5, 1973, p 50-52.



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