Numeric Function Generators
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Authors
Butler, J.T.
Sasao, T.
Nagayama, S.
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Date of Issue
2009-07
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Abstract
We show the architecture and design of a numeric function generator that realizes, at high speed, arithmetic functions, like log x, sin x, 1 x , etc.. This approach is general; different circuits are not needed for different functions. Further, composite functions, like log (sin ( 1 x )) can be realized as easily as individual functions. A tutorial description of the method is presented, followed by descriptions of the design considerations that must be made. For example, we discuss how circuit complexity increases as the desired approximation error decreases. Also, we discuss enhancements of the basic numeric function generator approach, including higher order polynomial approximations, floating point, and multi-variable implementations.
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Article
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Electrical and Computer Engineering (ECE)
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Naval Postgraduate School (U.S.)
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This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.