This paper proposes a novel design paradigm for circuits designed in quantum dot cellular automata （QCA） technology. Previously reported QCA circuits in the literature have generally been designed in a single layer ...This paper proposes a novel design paradigm for circuits designed in quantum dot cellular automata （QCA） technology. Previously reported QCA circuits in the literature have generally been designed in a single layer which is the main logical block in which the inverter and majority gate are on the base layer, except for the parts where multilayer wire crossing was used. In this paper the concept of multilayer wire crossing has been extended to design logic gates in multilayers. Using a 5-input majority gate in a multilayer, a 1-bit and 2-bit adder have been designed in the proposed multilayer gate design paradigm. A comparison has been made with some adders reported previously in the literature and it has been shown that circuits designed in the proposed design paradigm are much more efficient in terms of area, the requirement of QCA cells in the design and the input-output delay of the circuit. Over all, the availability of one additional spatial dimension makes the design process much more flexible and there is scope for the customizability of logic gate designs to make the circuit compact.展开更多
为提高某型航空发动机机械液压式燃油调节器试验台的试验效率、测试精度及可靠性,研制一种基于面向仪器设备的PCI扩展(PCI eXtensions for Instrumentation,PXI)总线的计算机测试系统。结合PXI总线技术特点,基于测试系统的技术要求和功...为提高某型航空发动机机械液压式燃油调节器试验台的试验效率、测试精度及可靠性,研制一种基于面向仪器设备的PCI扩展(PCI eXtensions for Instrumentation,PXI)总线的计算机测试系统。结合PXI总线技术特点,基于测试系统的技术要求和功能要求,给出系统的总体结构,详细介绍以美国NI公司PXI系统为核心的硬件设计,以及采用MicrosoftVisual Basic与NI Measurement Studio结合实现软件设计。展开更多
文摘This paper proposes a novel design paradigm for circuits designed in quantum dot cellular automata （QCA） technology. Previously reported QCA circuits in the literature have generally been designed in a single layer which is the main logical block in which the inverter and majority gate are on the base layer, except for the parts where multilayer wire crossing was used. In this paper the concept of multilayer wire crossing has been extended to design logic gates in multilayers. Using a 5-input majority gate in a multilayer, a 1-bit and 2-bit adder have been designed in the proposed multilayer gate design paradigm. A comparison has been made with some adders reported previously in the literature and it has been shown that circuits designed in the proposed design paradigm are much more efficient in terms of area, the requirement of QCA cells in the design and the input-output delay of the circuit. Over all, the availability of one additional spatial dimension makes the design process much more flexible and there is scope for the customizability of logic gate designs to make the circuit compact.
