全定制CORDIC运算器设计

Full Custom CORDIC Arithmetic Unit Design

浮点三角函数计算是导航系统、三维图像处理、雷达信号预处理等领域的基本运算。本文采用CORDIC算法及全定制集成电路设计方法实现了一种浮点三角函数计算电路,其输出数据兼容IEEE-754单精度浮点数标准。本文首先介绍了CORDIC算法的原理,并根据性能优先的原则采用了流水线结构;然后给出了基于SMIC 0.13μm 1P8M CMOS工艺下的静态电路结构及版图设计。全定制CORDIC运算器的面积为605 284μm2,最长路径延时(SS条件下)为3.013ns。

Floating-point trigonometric computing is a fundamental operation in navigation systems, 3D image processing, radar signal preprocessing and so on. This paper presents a floating point trigonometric computing circuit using a CORDIC algorithm and a full custom layout method, and the output data are compatible with the IEEE-754 signal precision floating-point standard. It describes the CORDIC algorithm principle and chooses a pipeline structure based on the principle of priority on performance. A static circuit structure and a full custom layout are given in the SIMC 0.13μm IPSM CMOS process. The silicon area of data path is 605 284μm^2 and the critical path delay is 3. 013ns in the SS （Slow-Slow） corners.