| Budget Amount *help |
¥18,070,000 (Direct Cost: ¥13,900,000、Indirect Cost: ¥4,170,000)
Fiscal Year 2013: ¥5,720,000 (Direct Cost: ¥4,400,000、Indirect Cost: ¥1,320,000)
Fiscal Year 2012: ¥5,720,000 (Direct Cost: ¥4,400,000、Indirect Cost: ¥1,320,000)
Fiscal Year 2011: ¥6,630,000 (Direct Cost: ¥5,100,000、Indirect Cost: ¥1,530,000)
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| Research Abstract |
Demand for small-size light-weight multi-functional high-performance wireless communication systems requires small-size high-speed low-power CMOS integrated circuits. To realize them, break-through for limitation in design approaches based on conventional A/D converters is important. In this study, as a step for stochastic signal detection seen in some creatures' sensory organs, linearity improvement of stochastic A/D converter was investigated. Concretely, by controlling distribution of comparators' offsets on purpose, nonlinearity originating from the offset's distribution was found to be reduced. In addition, as an application of stochastic A/D conversion, it was revealed that quantization based on the stochastic A/D converter can compensate error of internal D/A converter in a multi-bit Delta-Sigma modulator.
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