A shift-register-based QCA memory architecture

  • Authors:
  • Baris Taskin;Andy Chiu;Jonathan Salkind;Daniel Venutolo

  • Affiliations:
  • Drexel University, Philadelphia, PA;Drexel University, Philadelphia, PA;Drexel University, Philadelphia, PA;Drexel University, Philadelphia, PA

  • Venue:
  • ACM Journal on Emerging Technologies in Computing Systems (JETC)
  • Year:
  • 2009

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Abstract

A quantum-dot cellular automata (QCA) design of an nxm-bit, shift-register-based memory architecture is presented. The architecture maintains data at a stable conformation, which is contrary to traditional data in-motion concept for QCA architectures. The memory architecture is based on an existing dual-phase-synchronized, line-based, one-bit QCA memory cell building block that provides size and latency improvements over other known one-bit memory cells through its novel clocking scheme. Read/write latencies up to ∼2X lower than the existing tile-based architecture with three-phase, line-based memory cells are obtained. Simulations with QCADesigner and HDLQ are performed on a sample 4x8 bit memory architecture implementation.