INTERPOLATION SYSTEM FOR TRIGONOMETRICAL FUNCTION

摘要

PURPOSE:To shorten the arithmetic interpolation processing time by using a Taylor's expansion, addressing a data table to read out the differential coefficient of each member of said expansion, and applying the non-inversion or inversion to the relevant code. CONSTITUTION:A data table part 1 is prepared together with an address generating part 2, a bit inverting part 3 set between both parts 1 and 2, a code inverting part 4, and an arithmetic part 5. The data read out of the part 1 and undergone the non-inversion or inversion of its code via the par 4 is supplied to the part 5 for calculation of a Taylor's expansion. Thus it is possible to obtain the differential coefficients of each member of said expansion just by addressing the part 1 and changing the data code. Then the interpolation processing time is shortened.