2013 Fiscal Year Final Research Report
Study on Linearity Enhancement and Its Implementation in Stochastic Signal Detection
| Project/Area Number |
23360155
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Electron device/Electronic equipment
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| Research Institution | Osaka University |
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Principal Investigator |
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| Project Period (FY) |
2011-04-01 – 2014-03-31
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| Keywords | 確率共鳴 |
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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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