TRIGONOMETRIC FUNCTION ARITHMETIC UNIT AND TRIGONOMETRIC FUNCTION ARITHMETIC METHOD

摘要

PROBLEM TO BE SOLVED: To miniaturize the scale of the circuit by reducing circuits and ROMs for performing multiplication/division processing in a trigonometric function arithmetic operation.;SOLUTION: Processing results to be acquired by repeating a series of arithmetic processing are assembled so that a trigonometric function can be generated. At first, the first value as this time processing object is shifted by a preliminarily set predetermined shift value, and this shifted value is subtracted by a second value as this time processing object so that an output value can be calculated. Then, the first value is updated as a second value as the next processing object, and the output value is updated as the first value of the next processing object.;COPYRIGHT: (C)2007,JPO&INPIT