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A/D CONVERTER, IMAGE SENSOR DEVICE, AND METHOD OF GENERATING DIGITAL SIGNAL FROM ANALOG SIGNAL

外国特許コード F120006839
整理番号 S2011-0416
掲載日 2012年9月5日
出願国 世界知的所有権機関(WIPO)
国際出願番号 2012JP053868
国際公開番号 WO 2012/111821
国際出願日 平成24年2月17日(2012.2.17)
国際公開日 平成24年8月23日(2012.8.23)
優先権データ
  • 特願2011-033718 (2011.2.18) JP
発明の名称 (英語) A/D CONVERTER, IMAGE SENSOR DEVICE, AND METHOD OF GENERATING DIGITAL SIGNAL FROM ANALOG SIGNAL
発明の概要(英語)

The objective of the present invention is to attain an A/D converter that executes integration type A/D conversion, and cyclic type A/D conversion for the residual analog signal thereof, with a single-ended configuration. According to this A/D converter, a first A/D conversion operation for executing the integrating type A/D conversion, and a second A/D conversion operation for executing the cyclic type A/D conversion are attained by controlling the operation procedure of the same circuit configuration. Further, since, in the first A/D conversion operation, the capacity of a capacitor to be used for integrating the output signal is larger than the capacity of a capacitor to be used for storing an input analog signal and a reference voltage, an analog signal to be inputted for the integration type A/D conversion is attenuated according to the capacity ratio of the capacitors, before being sampled and integrated. Since the voltage range of the analog signal to be outputted in the integration type A/D conversion will become smaller according to the capacity ratio of the capacitors, an A/D converter can be configured with a single-ended configuration.

  • 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
  • NATIONAL UNIVERSITY CORPORATION SHIZUOKA UNIVERSITY,
  • KAWAHITO SHOJI
  • 発明者(英語)
  • KAWAHITO SHOJI
国際特許分類(IPC)
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