低面积低功耗的定点数指数计算方法及其VLSI实现  

A Low Area and Low Power Consumption Fixed-Point Exponent Calculation Method and its VLSI Implementation

作　　者：吕飞 梁杏成 张冷 王宇 罗元勇 LYU Fei;LIANG Xing-cheng;ZHANG Leng;WANG Yu;LUO Yuan-yong(Jinling Institute of Technology,Nanjing 211169,China;Nanjing Xiaozhuang University,Nanjing 211171,China;HiSilicon Technologies Co.,Ltd.,Shenzhen 518129,China)

机构地区：[1]金陵科技学院电子信息工程学院,江苏南京211169 [2]南京晓庄学院电子工程学院,江苏南京211171 [3]深圳市海思半导体有限公司,广东深圳518129

出　　处：《金陵科技学院学报》2023年第2期15-22,共8页Journal of Jinling Institute of Technology

基　　金：国家自然科学基金青年项目(62201234);江苏省普通高校自然科学研究项目(21KJB510012);金陵科技学院博士科研启动基金(jit-b-201907)。

摘　　要：现有的坐标旋转数字计算机(CORDIC)算法计算二进指数时,需要采用乘法器进行换底操作,增大了硬件消耗。为了解决此问题,提出了全新的可直接用于计算二进指数的二元双曲旋转CORDIC(BHR CORDIC)算法,得到了定点数指数计算单元,并将其描述成Verilog硬件描述语言(HDL)。基于65 nm互补金属氧化物半导体(CMOS)工艺,对提出的定点数指数计算单元进行综合,结果表明:相较于现有技术,基于BHR CORDIC定点数指数计算单元的超大规模集成电路(VLSI)的实现,可节约11.92%的面积和7.63%的功耗,且频率提升2.45%。The existing coordinate rotation digital computer(CORDIC)algorithm with a base of 2 needs to be calculated,an additional multiplier is needed to execute an operation of changing the base.The introduction of the multiplier increases hardware consumption.To solve the above problems,a new calculation method is proposed.This calculation method adopts a new binary hyperbolic CORDIC algorithm in rotation mode(BHR CORDIC)that can be directly used to calculate the exponent with a base of 2.Furthermore,BHR CORDIC is used to implement computing the exponent of fixed-point numbers which is described as Verilog hardware description language(HDL).Based on the 65 nm complementary metal oxide semiconductor(CMOS)technology,the proposed calculation unit of the exponent of fixed-point numbers is synthesized and analyzed.The results show that the very large scale intergration circuit(VLSI)of exponent of fixed-point numbers calculation unit based on BHR CORDIC can save 11.92%area and 7.63%power consumption,and increase frequency by 2.45%when compared with the existing methods.

关 键 词：定点数指数 二进双曲旋转CORDIC VLSI实现 面积 功耗 

分 类 号：TN492[电子电信—微电子学与固体电子学]