The robust QCA adder designs using composable QCA building blocks

Kyosun Kim, Kaijie Wu, Ramesh Karri

Research output: Contribution to journalArticlepeer-review


Quantum-dot cellular automata (QCA) is attracting a lot of attention due to its extremely small feature size and ultralow power consumption. Up to now, several adder designs using QCA technology have been proposed. However, it was found that not all of the designs function properly. This paper analyzes the reasons of the failures and proposes adders that exploit proper clocking schemes.

Original languageEnglish (US)
Pages (from-to)176-183
Number of pages8
JournalIEEE Transactions on Computer-Aided Design of Integrated Circuits and Systems
Issue number1
StatePublished - Jan 2007


  • Clocked quantum-dot cellular automata (QCA)
  • Crossover
  • Majority gates
  • Sneak noise

ASJC Scopus subject areas

  • Software
  • Computer Graphics and Computer-Aided Design
  • Electrical and Electronic Engineering


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