CFE: a convenient, flexible, and efficient clocking scheme for quantum-dot cellular automata

作     者：Deng, Feifei Xie, Guangjun Cheng, Xin Zhang, Zhang Zhang, Yongqiang 

作者机构：Hefei Univ Technol Sch Elect Sci & Appl Phys Hefei 230009 Peoples R China 

出 版 物：《IET CIRCUITS DEVICES & SYSTEMS》 (IET Circuits Devices Syst.)

年 卷 期：2020年第14卷第1期

页      面：88-92页

核心收录：

学科分类：0808[工学-电气工程] 08[工学] 

基　　金：Fundamental Research Funds for the Central Universities of China [JZ2019HGTB0092] 

主　　题：logic design cellular automata clocks quantum dots electronic design automation convenient clocking scheme quantum-dot cellular automata digital circuit designs QCA circuit design clock distribution transmission lines clock schemes electronic design automation complex circuits neighbouring clock zone circuit design process CFE scheme standard clock mechanism flexible clocking scheme information transmission directions 

摘      要：Quantum-dot cellular automata (QCA) is a highly attractive alternative to CMOS for future digital circuit designs. The circuits in QCA have been extensively studied, which suffer from negative impacts due to the limits of the manual design process, even for a modest complexity. In the process of QCA circuit design, the problems caused by clock distribution and long transmission lines have to be considered. In order to solve such problems, some researchers have proposed several clock schemes and expected to realise electronic design automation. These clock schemes, however, have drawbacks;the most important one is the limitation of flexibility on designing complex circuits. In this regard, this study proposes a convenient, flexible, and efficient (CFE) clocking scheme by using diamond structures for clock zones, each of which has the same neighbouring clock zone and four information transmission directions. It has main advantages of existing clocking schemes and can commendably increase the flexibility in circuit design process. In order to show the suitability of the proposed CFE scheme using standard clock mechanism in QCA, several types of circuits proposed in this study reveal its advantages in comparison with an existing state-of-the-art clocking scheme.