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Generating Subtractor Design by QCA Gates under Nanotechnology

Journal Name:

  • International Journal of Science and Engineering Investigations

Publication Year:

  • 2013

Key Words:

Author NameUniversity of Author
Abstract (2. Language): 
QCA is a nanotechnology that has recently been recognized as one of the top six growing technologies with potential applications in future computers. In this paper several logic gates like MV and NOT under QCA nanotechnology are presented. Boolean functions are combined by MV and NNI gates or simply NNI gates alone, eliminating inverter (NOT) gate. We described that half subtractor circuits produced by utilizing a simple recursive arrangement of 2-inputs, 2-outputs AND-NAND (A-NA) and OR-NOR (O-NO) logic gates and MV gates for full subtractor realizable with QCA (Quantum Dot Cellular Automata) technology. We will construct the symmetric function by (EX-EXN) block which can be substituted with two (A-NA) blocks and one (O-NO) block. They can also be substituted by two (O-NO) blocks and one (A-NA) block. We will also show that if one (EX-EXN) block and (A-NA) or (O-NO) blocks are used, the output will be 1 or 0. We will also construct the half subtractor and full subtractors using QCA gates. We also indicate that by using NNI gates we can use much less NOT gates. The results show that we are able to define the above mentioned circuits with different status and same results.
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FULL TEXT (PDF): 
PDF icon ijsei-21413-07.pdf
  • 14
30-34
  • English

REFERENCES

References: 

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