高技术通讯2017，Vol.27Issue(1)：38-45,8.DOI:10.3772/j.issn.1002-0470.2017.01.005
一种同步输出的稀疏树前导零检测电路
A synchronous output leading-one-detector circuit based on sparse tree
摘要
Abstract
To reduce the delay and the arrival time difference of a leading-one-detector circuit, a sparse-tree based leading-one-detector structure and its dynamic circuit implementation method were presented.Two new kinds of logical Boolean operations were defined by recursive expression to form the nodes of the sparse tree.The precalculated clock''s skew in the pre-charge stage can be accurately controlled, so the leakage power and the arrival time difference can be simultaneously controlled.In consideration of the various numbers of input ports, the extending network by connecting same spot units shortens the time cost on designing.There is less logic level and fan-out in the structure presented.The whole circuit was verified by the pseudo random test vector.This technique could reduce the critical path length by 20% and keep the arrival time in 1 picosecond.关键词
前导零检测器/点操作/块操作/稀疏树/同步输出/动态电路Key words
leading one detector/spot operation/sparse tree/synchronism output/dynamic circuit引用本文复制引用
刘臻,王剑,王昊..一种同步输出的稀疏树前导零检测电路[J].高技术通讯,2017,27(1):38-45,8.基金项目
国家"核高基"科技重大专项课题(2014ZX01020201,2014ZX01030101),国家自然科学基金(61432016)和863计划(2013AA014301)资助项目. （2014ZX01020201,2014ZX01030101）
