一种同步输出的稀疏树前导零检测电路

发布时间：2018-03-21 20:54

本文选题：前导零检测器　切入点：点操作　出处：《高技术通讯》2017年01期 　论文类型：期刊论文

【摘要】：为了降低前导零检测电路的延时和提高端口输出的同步性,提出了一种稀疏树前导零检测结构及动态电路的实现方法。通过递归前导零算法表达式定义了两种新的布尔运算逻辑,以构成稀疏树中的结点。精确控制动态电路中预充时钟的偏移量,在抑制电路漏电的同时控制输出端口延时差。该结构能够以最少的逻辑级数和均衡的运算单元负载实现检测前导零功能,对于不同数量的待测信号,通过扩展"点操作"和"块操作"单元互连网络来生成新电路。采用伪随机激励向量验证了电路功能的正确性,大幅缩短了验证时间,在SMIC 40nm工艺下仿真显示,各端口输出延时差小于1ps,数据路径长度可降低20%。
[Abstract]:In order to reduce the leading zero detection circuit delay and improve the synchronization of output ports, proposed the structure and dynamics of zero detection circuit of a sparse tree. Leading by recursive expressions for two kinds of new algorithm leading zero Boolean logic is defined, to form sparse tree nodes. Precise control of pre charge clock offset in dynamic circuit, control output port delay in suppressing circuit leakage at the same time. This structure can use logical series with minimum unit load balancing function for leading zero detection, the signal to be measured in different amounts, to generate a new circuit by extending the "operation" and "block" unit interconnection network. The pseudo random excitation vector to verify the correctness of the circuit function, shorten the test time, the simulation shows in SMIC 40nm process, the output delay is less than 1ps, according to the number of path length Can reduce 20%.

【作者单位】：计算机体系结构国家重点实验室(中国科学院计算技术研究所);中国科学院计算技术研究所;中国科学院大学;龙芯中科技术有限公司;
【基金】：国家“核高基”科技重大专项课题(2014ZX01020201,2014ZX01030101) 国家自然科学基金(61432016) 863计划(2013AA014301)资助项目
【分类号】：TN40;TP332

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