Research Institute of Electrical Communication Tohoku University

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Takahiro Hanyu,Professor

Masanori Natsui,Associate Professor

Naoya Onizawa,Assistant Professor

Daisuke Suzuki,Assistant Professor

Akira Tamakoshi,Research Fellow

(from left) Naoya Onizawa, Takahiro Hanyu, 
Masanori Natsui Daisuke Suzuki 
Akira Tamakoshi

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Research Activities

Very Large-Scaled Integrated (VLSI) processors and their applications to electronics systems, where VLSI processors are used as a “brain” for intelligent control like human beings, are the key components in the recent information communication technology (ICT) society. In this research division, we explore a path towards a new paradigm VLSI processor beyond brain utilizing novel device technologies and new-paradigm circuit architecture such as logic-in-memory architecture.

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New Paradigm VLSI System(Prof. Hanyu)

We are studying a “new-paradigm VLSI computing” concept that investigates the optimal design through all the VLSI design layers from a device/material design level to an application-oriented algorithm level.“Logic-in-memory VLSI architecture,”where storage elements are distributed over a logic-circuit plane, makes global wires reduced greatly.To implement a logic-in-memory VLSI compactly, we utilize nonvolatile devices such as magnetic tunnel junction (MTJ) devices and focus on other challenging research subjects such as stochastic logic.

Research topics

  • Nonvolatile logic-in-memory VLSI architecture and its application to ultra-low-power VLSI processors
  • Device-model-based new-paradigm VLSI computing architecture
  • Asynchronous-control/multiple-valued data representation-based circuit for a high-performance Network-on-Chip
  • Low-power VLSI design technology based on stochastic logic

New Paradigm VLSI Design (Assoc. Prof. Natsui)

We are studying a new VLSI design paradigm for highly-dependable VLSIs in the nanoscale and post-silicon era. To fully utilize the benefits of technology scaling, we are focusing on PVT-variation-aware VLSI architecture and its applications, self-adaptive system for resilient VLSI, brain-like optimization algorithm and its application to VLSI design methodology, and electronic design automation (EDA) algorithms for Nonvolatile logic-in-memory VLSI.

Research topics

  • PVT-variation-aware VLSI architecture and its applications
  • Self-adaptive system for resilient VLSI
  • Optimization algorithm and its application to VLSI design methodology
  • EDA/CAD algorithms for new paradigm VLSI systems