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  1. Newsgroups: sci.electronics
  2. Path: sparky!uunet!munnari.oz.au!metro!dmssyd.syd.dms.CSIRO.AU!megadata!swanee
  3. From: swanee@megadata.mega.oz.au (Geoff Swan)
  4. Subject: Re: Detecting Sine Wave freq
  5. Message-ID: <1993Jan12.220056.10593@megadata.mega.oz.au>
  6. Sender: news@megadata.mega.oz.au
  7. Organization: Megadata P/L, North Ryde, Sydney, Aust.
  8. References:  <1993Jan9.214241.22174@murdoch.acc.Virginia.EDU> <1993Jan10.024315.24578@murdoch.acc.Virginia.EDU>
  9. Date: Tue, 12 Jan 1993 22:00:56 GMT
  10. Lines: 17
  11.  
  12. In article <1993Jan10.024315.24578@murdoch.acc.Virginia.EDU>, pmw2c@csissun10.ee.Virginia.EDU (Paul Michael Wayner) writes:
  13. >  I'm interested in designing a circuit that will determine
  14. >  if a sine wave frequency is in a certain range of values,
  15. >  specifically, 45-51 MHz.  It is very important that the
  16. >  detector be as reliable a possible, so I would like to use
  17. >  only a few active components and try to stick to RC's as
  18. >  much a possible.
  19. >                       Paul Wayner
  20.  
  21. Have you looked at any PLL's yet? They should do the trick fairly easily.
  22.  
  23. --------------------------------------------------------------------------
  24. Geoff Swan (research & development)   _--_|\         swanee@megadata.oz.au
  25. Megadata Pty Ltd                     /      \ 
  26. 2/37 Waterloo Rd, North Ryde,        \_.--._/               +61 2 805 0899
  27. NSW 2113, Australia.                       v          (Fax) +61 2 887 4847
  28.  
  29.