面向VLSI实现三角函数求解算法

研究面向超大规模集成电路实现三角函数求解算法及其电路结构的实现。方法首先采用坐标旋转数字计算法推导求解三角函数的有效算法，然后利用小角度时的三角函数倍角公式推导有效的三角函数求方法。

A VLSI-Oriented Trigonometric Function Algorithms

Aim To study the VLSI oriented algorithm of trigonometric function and its correspondent circuit architecture. Methods The CORDIC algorithm was used firstly to deduce the algorithm of evaluating trigonometric function. In order to get the effective algorithm of evaluating trigonometric function, the trigonometric function of multiple angles was used. Results and Conclusion The multiple angle algorithm that has a simple circuit architecture and can be used to evaluate the trigonometric function of any angle without looking up the value table of trigonometric function was gotten. The improved CORDIC algorithm and its correspondent VLSI array architecture were acquired at the same time. The correctness of two kinds of algorithm was proved by computer simulation results.