M倍降速流水线技术实现正切余切

随着超大规模集成电路（VLSI, Very Large Scale Integrated circuites）技术的飞速发展，经常需要用硬件快速精确地进行三角函数的计算，而坐标旋转算法（CORDIC, Cordinate Rotational Digital Computer）能够将多种难以用硬件电路直接实现的复杂三角函数运算分解为统一的加减、移位操作，极大地降低了硬件设计的复杂性。这里在Circular CORDIC和Linear CORDIC的基础之上，搭建了正切余切模块的计算。介绍了M倍降速递归流水线技术，以及在保证车交II夹运算速度的前提下，如何尽可能减少系统的逻辑资源占用。

Tangent and Cotangent Implementation of M-Circuit Pipline Technology

With the rapid development of VLSI （Very Large Scale Integrated circuits）,hardware is often required for fast and accurate calculation of trigonometric functions CORDIC （Coordinate Rotation Digital Computer） could directly disassemble the complex operations which is hardly achieved by the hardware circuit into unified addition and subtraction, thus greatly reducing the complexity of hardware design. Based on the foundation of circular CORDIC and linear CORDIC, the calculation of tangent cotangent module is implemented. This paper describes the M-Circuit pipeline technology, and under the premise of ensuring faster operation speed, how to reduce as much as possible the logic resources occupation.