Evaluation of soft-delay-error effects in content-addressable memory

N. Onizawa, N. Sakimura, R. Nebashi, T. Sugibayashi, T. Hanyu

Research output: Contribution to journalArticlepeer-review


In recent technology nodes, a timing-error issue due to particle strike into semiconductor materials is getting critical. This paper evaluates a soft-delay-error (SDE) effect due to particle strike for soft-error tolerant content-addressable memories (CAMs). The SDE is that a particle strike into semiconductor materials induces a transient pulse signal, causing a delay variation and a timing error of an integrated circuit. The delay variation is evaluated using a charge-injection model at a transistor level for two different CAMs. One of the CAMs is a traditional 9-transistor-cell based CAM and the other is a magnetic-tunnel-junction (MTJ)/MOS hybrid cell based CAM that operates based on a multiple-valued current-mode logic. These two CAMs are simulated using a SPICE simulator that can handle both transistors and MTJ devices in a 90nm CMOS/100nm MTJ technology. Based on the simulation results, circuit architectures and design parameters are discussed in order to design soft-error tolerant CAMs.

Original languageEnglish
Pages (from-to)125-140
Number of pages16
JournalJournal of Multiple-Valued Logic and Soft Computing
Issue number1-2
Publication statusPublished - 2016


  • Associative memory
  • CAM
  • Magnetic-tunnel-junction (MTJ) device
  • Nonvolatile memory
  • Single-event upset (SEU)
  • Soft error

ASJC Scopus subject areas

  • Software
  • Logic
  • Theoretical Computer Science


Dive into the research topics of 'Evaluation of soft-delay-error effects in content-addressable memory'. Together they form a unique fingerprint.

Cite this