SAW resonator(Éù²¨±íÃæÕñµ´Æ÷)Ïêϸ½éÉÜ

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  ¾§Ìå²úÆ·ÓÐÁ½ÖÖÐÎʽ£º¾§Ìåµ¥Ôª(Crystal Unit,Ë׳ÆÎÞÔ´¾§Õñ)ºÍ¾§ÌåÕñµ´Æ÷(Oscillator£¬Ë׳ÆÓÐÔ´¾§Õñ)¡£¾§ÌåÕñµ´Æ÷Æäʵ¾ÍÊǾ§Ìåµ¥ÔªºÍ¸÷ÖÖ°ëµ¼ÌåIC×éºÏ¶ø³ÉµÄÄ£¿é£¬¾§ÌåÕñµ´Æ÷µÄÖ÷ҪƵÂÊÌØÐÔ¶¼È¡¾öÓÚÆäÄÚ²¿¾§Ìåµ¥Ôª¡£

  ¾§Ìåµ¥ÔªµÄÌØÐÔÈ¡¾öÓÚÇиÒÕ£¬Ö÷ÒªÓÐÈýÖÖ£º

  a) Òô²æÐÍ(Turning Fork)£ºÆµÂÊÖ÷ÒªÊÇKHz¼¶£¬±ÈÈç32.768KHz

  b) AT-CutÐÍ£ºÆµÂÊÖ÷ÒªÊÇMHz¼¶£¬±ÈÈç12MHz£¬26MHz£¬125MHzµÈ

  c) SAWÐÍ£ºÆµÂÊΪ°ÙMHzÉõÖÁGHz

  SAWÊÇSurface Acoustic WaveµÄËõд£¬³ÆΪÉù²¨±íÃæÕðµ´Æ÷£¬ÆäÕð¶¯ÑØמ§Ìå»ùƬ±íÃæ´«²¥¡£Ò»¸öSAWÕðµ´Æ÷ÓÉÒ»¸öIDT(²æָʽ»»ÄÜÆ÷Interdigital Transducer)ºÍ·´ÉäÆ÷×é³É¡£ÆäƵÂÊ(f)ÓÉÔ­ÁÏËÙ¶È(v)£¬ºÍIDT·ù¶È(¦Ë)¾ö¶¨¡£

  ¶¨Ò幫ʽÈçÏÂ:f = v/¦Ë f [MHz], v [m/s], ¦Ë [¦Ìm]

  ÀýÈ磺Material;Quartz ( v = 3,200 m/s), ¦Ë = 10 [¦Ìm] ? f = 320MHz

  SAWÐÍÕñµ´Æ÷Ó¦Óãº

  EpsonÌṩSAW(Éù²¨±íÃæ)Õðµ´Æ÷ºÍÂ˲¨Æ÷£¬ÓÃÓÚRF(ÉäƵ)Ó¦Óá£SAWÕðµ´Æ÷±»ÓÃÓÚƵÂʳ¬¹ý100MHzͨѶϵͳµÄÓ¦ÓÃÀ±ÈÈçÆû³µÒ£¿ØÔ¿³×(RKE)¡£

³£Óþ§Õñ¹æ¸ñ²ÎÊý£º

  Common frequency: ³£ÓÃƵµã

  Frequency tolerance: ƵÂÊÎȶ¨¶È

  Actual package: ʵ¼Ê·â×°

  Supply voltage: ¹¤×÷µçѹ

  Motional resistance: ¶¯Ì¬×迹

  Load capacitance: ¸ºÔصçÈÝ

  Non linearity: ·ÇÏßÐÔ¶È

  Operating temperature: ¹¤×÷ζÈ

  Frequency range: ƵÂÊ·¶Î§

  Current consumption: µçÁ÷ÏûºÄ

  Output control: Êä³ö¿ØÖÆ

  Size (mm): ³ß´ç(mm)

  Detection range: ¼ì²â·¶Î§

  Scale factor: ±ÈÀýÒò×Ó

  Frequency / temperature characteristics: ƵÂÊ/ζÈÌØÐÔ

  Frequency/control range ƵÂÊ/¿ØÖÆ·¶Î§

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