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[Author] Ryuji YOSHIMURA(4hit)

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  • Watch-Dog Circuit for Quality Guarantee with Subthreshold MOSFET Current

    Tetsuya HIROSE  Ryuji YOSHIMURA  Toru IDO  Toshimasa MATSUOKA  Kenji TANIGUCHI  

     
    PAPER

      Vol:
    E87-C No:11
      Page(s):
    1910-1914

    We propose an ultra low power watch-dog circuit with the use of MOSFETs operation under subthreshold characteristics. The circuit monitors the amount of the product degradation because the subthreshold current of MOSFET emulates the rate of the general chemical reaction. Its operation was verified with both SPICE simulation and the measurement of the prototype chip. The new circuit embedded in a tag attached to any product could dynamically monitor the degradation regardless of storage conditions.

  • Dynamically Programmable Parallel Processor (DPPP): A Novel Reconfigurable Architecture with Simple Program Interface

    Boon-Keat TAN  Ryuji YOSHIMURA  Toshimasa MATSUOKA  Kenji TANIGUCHI  

     
    PAPER

      Vol:
    E84-D No:11
      Page(s):
    1521-1527

    This paper describes a new architecture-based microprocessor, a dynamically programmable parallel processor (DPPP), that consists of large numbers of simplified ALUs (sALU) as processing blocks. All sALUs are interconnected via a code division multiple-access bus interface that provides complete routing flexibility by establishing connections virtually through code-matching instead of physical wires. This feature is utilized further to achieve high parallelism and fault tolerance. High fault tolerance is realized without the limitations of conventional fabrication-based techniques nor providing spare elements. Another feature of the DPPP is its simple programmability, as it can be configured by compiling numerical formula input using the provided user auto-program interface. A prototype chip based on the proposed architecture has been implemented on a 4.5 mm 4.5 mm chip using 0.6 µm CMOS process.

  • A Reconfigurable Digital Signal Processor

    Boon Keat TAN  Toru OGAWA  Ryuji YOSHIMURA  Kenji TANIGUCHI  

     
    PAPER

      Vol:
    E81-C No:9
      Page(s):
    1424-1430

    This paper describes a new architecture-based DSP processor, which consists of n n mesh multiprocessor for digital signal processing. A prototype chip, RCDSP9701 has been designed and implemented using a CMOS 0. 6 µm process. This architecture has better performance compare to the traditional microprocessor solution to Digital Signal Processing. The proposed method poses remarkable flexibility compare to ASIC (Application Specified Integrated Circuits) approach for Digital Signal Processing applications. In addition, the proposed architecture is fault tolerant and suitable for parallel computing applications. In this paper, an implementation into a silicon chip of the new architecture is presented to give a better understanding of our work.

  • A Novel Dynamically Programmable Arithmetic Array (DPAA) Processor for Digital Signal Processing

    Boon-Keat TAN  Ryuji YOSHIMURA  Toshimasa MATSUOKA  Kenji TANIGUCHI  

     
    PAPER

      Vol:
    E84-A No:3
      Page(s):
    741-747

    A new architecture-based Dynamically Programmable Arithmetic Array processor (DPAA) is proposed for general purpose Digital Signal Processing applications. Parallelism and pipelining are achieved by using DPAA, which consists of various basic arithmetic blocks connected through a code-division multiple access bus interface. The proposed architecture poses 100% interconnection flexibility because connections are done virtually through code matching instead of physical wire connections. Compared to conventional multiplexing architectures, the proposed interconnection topology consumes less chip area and thus, more arithmetic blocks can be incorporated. A 16-bit prototype chip incorporating 10 multipliers and 40 other arithmetic blocks had been implemented into a 4.5 mm 4.5 mm chip with 0.6 µm CMOS process. DPAA also features its simple programmability, as numerical formula can be used to configure the processor without programming languages or specialized CAD tools.