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ANALOG/DIGITAL CONVERTER AND METHOD FOR CONVERTING ANALOG SIGNALS TO DIGITAL SIGNALS

外国特許コード F130007291
整理番号 EF001P01
掲載日 2013年4月11日
出願国 世界知的所有権機関(WIPO)
国際出願番号 2012JP072786
国際公開番号 WO 2013/042548
国際出願日 平成24年9月6日(2012.9.6)
国際公開日 平成25年3月28日(2013.3.28)
優先権データ
  • 特願2011-207602 (2011.9.22) JP
発明の名称 (英語) ANALOG/DIGITAL CONVERTER AND METHOD FOR CONVERTING ANALOG SIGNALS TO DIGITAL SIGNALS
発明の概要(英語)

The objective of the invention is to provide an A/D converter that exhibits fewer malfunctions due to variations in manufacturing. An A/D converter (1) of the invention, which is a cyclic type of analog/digital converter for converting an analog input signal to a digital signal having a predetermined resolution, comprises: a digital approximation unit (10) that includes a comparing unit (13) for comparing the magnitude of an input first analog signal with a threshold value to output a digital value indicating a result of the comparison and that also includes an MDAC unit (14) for amplifying the first analog signal to beta-fold, where beta is greater than one but smaller than two, and for executing a predetermined computation in accordance with the result of the comparison of the comparing unit to output a second analog signal

a multiplexer (20) that, if the MSB is to be computed, outputs the analog input signal and, otherwise, outputs the second analog signal as the first analog signal

a beta estimating unit (30) that estimates the value of beta

and a digital signal outputting unit (40) that sequentially takes in digital values outputted by the comparing unit and that outputs the taken-in digital values as the digital signal.

  • 出願人(英語)
  • ※2012年7月以前掲載分については米国以外のすべての指定国
  • JAPAN SCIENCE AND TECHNOLOGY AGENCY,
  • SAN, HAO,
  • MARUYAMA, TSUBASA,
  • HOTTA, MASAO
  • 発明者(英語)
  • SAN, HAO,
  • MARUYAMA, TSUBASA,
  • HOTTA, MASAO
国際特許分類(IPC)
参考情報 (研究プロジェクト等) FIRST Mathematical Theory for Modeling Complex Systems and its Transdisciplinary Applications in Science and Technology AREA
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