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文章基于传统的部分译码桶式移位器,对其关键路径进行了改进,根据移位的特点,引进了一种逆序变换方法以达到数据路径与控制路径的平衡,并据此提出了一种折叠式的电路结构以减少连线延迟和面积,改进后BS的关键路径由一级三输入与非门和一级缓冲器组成,实现高速桶式移位器设计。用SMIC0.13!m/1.2V工艺仿真结果显示新结构的桶式移位器的关键路径延迟为0.5ns,比传统结构延迟时间缩短了38%。
Based on the traditional partial decoding barrel shifter, this paper improves its critical path. According to the characteristics of shifting, a reverse order transformation method is introduced to achieve the balance between data path and control path. Based on this, a The foldable circuit structure reduces the connection delay and the area. The improved BS critical path consists of a first-level three-input NAND gate and a first-level buffer, realizing high-speed barrel shifter design. The SMIC0.13! M / 1.2V process simulation results show that the barrel barrel shifter of the new structure has a critical path delay of 0.5ns, which is 38% shorter than that of the conventional structure.