A Quantum Cellular Automata Decimal Full Adder

Abstract

The invention discloses a decimal full adder of quantum cellular automata. On the premise of not changing the logic function of the circuit, the QCA is optimized by combining the XOR logic operator with stronger expressive ability and the advanced carry structure of the full adder. The number of logic nodes and logic depth required by the decimal full adder, so as to optimize the area and delay of one-bit and multi-bit QCA decimal full adder circuits. Compared with the traditional full adder with the best performance, the quantum cellular automaton decimal full adder proposed by the present invention has excellent performance, and the delay and area are significantly improved, especially in the quantum cellular automaton 8-bit decimal full adder The optimization effect is more obvious, and the delay and area are increased by 27.6% and 53.4% ​​respectively. The invention greatly reduces the circuit cost, and at the same time enriches the circuit research method in circuit design. The invention provides a new research idea for arithmetic circuit design based on majority logic and XOR logic, and has strong practical significance for the development of circuit design.

Description

technical field [0001] The invention relates to the technical field of circuit design of quantum cellular automata, in particular to a decimal full adder of quantum cellular automata. Background technique [0002] In integrated circuits, complementary metal oxides (CMOS) are approaching their physical limits, and quantum effects as well as heat dissipation and power consumption issues arise. However, it is difficult to fundamentally solve these problems through existing technologies and processes. Therefore, in order to further increase the integration level of integrated circuits and reduce the feature size of circuits, many emerging nano-circuit devices have emerged as the times require. As a new type of nano-devices, Quantum-dot Cellular Automata (QCA) has the characteristics of high integration, low power consumption and fast operation speed, and is considered to be one of the candidates to replace traditional CMOS devices. QCA uses the Coulomb force between cells to p...

AI Technical Summary

Problems solved by technology

In the past, traditional QCA circuits used most logic gates and inverters for design. Although complete logic functions can be realized, the logic expressions are still not compact enough, and the area and delay are relatively high.

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