Shinobu Fujita

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Three-dimensional die stacking integration provides the ability to stack multiple layers of processed silicon with a large number of vertical interconnects. Through Silicon Vias (TSVs) provide a promising area- and power-efficient way to support communication between different stack layers. Unfortunately, low TSV yield significantly impacts design of(More)
Through silicon vias (TSVs) provide an efficient way to support vertical communication among different layers of a vertically stacked chip, enabling scalable 3-D networks-on-chip (NoC) architectures. Unfortunately, low TSV yields significantly impact the feasibility of high-bandwidth vertical connectivity. In this paper, we present a semi-automated design(More)
We propose novel compact fault recovering flip-flops (CFR-FFs) which can recover timing error and soft error caused by process variation, supply voltage fluctuation, attacking high energy particle, and so on. Those FFs are composed of an error detector and a clock controller, which re-raises a clock to latch correct data upon error detecting. We propose two(More)
Due to their excellent electrical properties, metallic carbon nanotubes are promising materials for interconnect wires in future integrated circuits. Simulations have shown that the use of metallic carbon nanotube interconnects could yield more energy efficient and faster integrated circuits. The next step is to build an experimental prototype integrated(More)
We have proposed 3-D nanoarchitectures with carbon nanotube-based nano-electromechanical systems (CNT-NEMS) switch with a floating gate. It is shown that logic based on them has the potential to replace CMOS using process technology of less than 45 nm. Furthermore, CNT-NEMS-based 3-D circuits realize extremely high bandwidth of over 10 petabyte/s cm with(More)
The 8m class telescopes in the ground-based optical astronomy together with help from the ultrasharp eye of the Hubble Space Telescope have enabled us to observe forming galaxies beyond redshift z = 5. In particular, more than twenty Lyα-emitting galaxies have already been found at z > 5. These findings provide us with useful hints to investigate how(More)
In order to elucidate the importance of a ferredoxin (Fd) Arg-Glu pair involved in dynamic exchange from intra- to intermolecular salt bridges upon complex formation with ferredoxin-NADP(+) oxidoreductase (FNR), Equisetum arvense FdI and FdII were investigated as normal and the pair-lacking Fd, respectively. The FdI mutant lacking this pair was unstable and(More)
With the advent of carbon nanotube technology, evaluating circuit and system performance using these devices is becoming extremely important. In this paper, we propose a quasi-analytical device model for intrinsic ballistic CNFET, which can be used in any conventional circuit simulator like SPICE. This simple quasi-analytical model is seen to be effective(More)