FM多重波によるウオッチ型情報受信端末の受信システム Message Watch Receiver using FM Subcarrier

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抄録

Watch type redio apparatus is a symbolic one and a dream merchandise as well in the future world. As the first step of ideal two way radio apparatus, we have developed a message watch receiver by use of FM subcarrier system. The Message Watch Receiver has the following features; 1) Using custom IC's for minimizing watch size:These are each for FM receiver, data decoder and CPU. FM receiver is of single-heterodyne type which receives the U.S. and European FM band (87.4 to 108MHz). A image cancelling Mixer is included. 2) Duo-binary technique for acheving higher bit rate (19kbit/sec):Data synchronized 19kHz clock signal can be transformed. This technique makes data decoding much more simpler than binary system. 3) Special tuning technique for watch band anntena:Since loop antenna is in the watchband, special tuning technique is used to adjust the band length and tune correct frequency. Antenna is tuned to make receiving signal level maximum. 4) Long battery life over 1.5 year:40ms receiving period and nearly 120s receiving cycle achieve very small average current consumption. This keeps battery life of the watch 1.5 years. Basic technique for achieving these features are described here. we can use this message watch in the U.S. snd Europe at present.

収録刊行物

  • 日本時計学会誌

    日本時計学会誌 (155), 23-37, 1995-12-25

    一般社団法人日本時計学会

各種コード

  • NII論文ID(NAID)
    110002775992
  • NII書誌ID(NCID)
    AN00195723
  • 本文言語コード
    JPN
  • 資料種別
    ART
  • ISSN
    00290416
  • NDL 記事登録ID
    3639682
  • NDL 刊行物分類
    ND85(電気通信--無線)
  • NDL 雑誌分類
    ZN12(科学技術--機械工学・工業--精密機械)
  • NDL 請求記号
    Z16-440
  • データ提供元
    CJP書誌  NDL  NII-ELS 
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