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FREQUENCY MEASURING APPARATUS AND FREQUENCY MEASURING METHOD

外国特許コード F080001934
整理番号 F080001934
掲載日 2008年9月12日
出願国 世界知的所有権機関(WIPO)
国際出願番号 2007JP055885
国際公開番号 WO 2007/119488
国際出願日 平成19年3月22日(2007.3.22)
国際公開日 平成19年10月25日(2007.10.25)
優先権データ
  • 特願2006-079686 (2006.3.22) JP
発明の名称 (英語) FREQUENCY MEASURING APPARATUS AND FREQUENCY MEASURING METHOD
発明の概要(英語) In a first frequency measuring apparatus, a frequency or a period can be measured with high accuracy and high resolution without increasing a sampling interval because of using times at many zero cross positions for the measurement by measuring the period or the frequency of waveform information on the basis of the average value of the time at each of the zero cross positions in a predetermined range including a zero cross position whose time is to be measured. In a second frequency measuring apparatus, the frequency or the period can be measured with high accuracy and high resolution without increasing the sampling interval because of using the times at many zero cross positions for the measurement by measuring the period or the frequency of the waveform information on the basis of the average value of the difference between a plurality of the times calculated from the time at each of the zero cross positions in a predetermined range including the zero cross position whose time is to be measured.
  • 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 Gunma University
  • 発明者(英語)
  • Fujii, Yusaku
国際特許分類(IPC)
指定国 AE AG AL AM AT AU AZ BA BB BE BF BG BH BJ BR BW BY BZ CA CF CG CH CI CM CN CO CR CU CY CZ DE DK DM DZ EC EE EG ES FI FR GA GB GD GE GH GM GN GQ GR GT GW HN HR HU ID IE IL IN IS IT JP KE KG KM KN KP KR KZ LA LC LK LR LS LT LU LV LY MA MC MD MG MK ML MN MR MT MW MX MY MZ NA NE NG NI NL NO NZ OM PG PH PL PT RO RS RU SC SD SE SG SI SK SL SM SN SV SY SZ TD TG TJ TM TN TR TT TZ UA UG US UZ VC VN ZA ZM ZW
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