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Regular fabric structure is expected to reduce the process variations and increase the yield in sub-micron technology regime. Few experimental assessments, however, for the effectiveness of the regular structures has been carried out yet. In this paper, three kinds of circuit blocks are implemented with four kinds of layout styles with different regularity, and the effect of regularity on the circuit...
The minimum operating voltage (VDDmin) of 90-nm CMOS ring oscillators (RO's) is investigated in order to clarify the lower limit of supply voltage (VDD) for logic circuits. The measured VDDmin is determined by the intra-die threshold voltage random variations and increased from 91 mV to 224 mV when the number of RO stages increased from 11 to 1001, which hinders the VDD scaling. Lowering VDDmin is...
In this paper, we present a problem-solving support system for mathematical sciences as a metasystem. We have implemented an integrated associative search for mathematical expressions and propose a GUI system which is suitable for use with this retrieval system. We present a prototype system with those systems we have implemented. The prototype system enables users' searching mathematical expressions...
A single-chip H.264/MPEG-4 audio/visual LSI for mobile applications with a module-wise dynamic voltage/frequency scaling architecture is described. This LSI operates even during the voltage/frequency transition with no performance overhead by using a dynamic de-skewing system and an on-chip voltage regulator with slew-rate control. The IC consumes 90mW in decoding QVGA H.264 video at 15f/s and MPEG-4...
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