is this circuit FM Receiver ?

Discussion in 'The Projects Forum' started by samsam_91, Dec 1, 2012.

  1. samsam_91

    Thread Starter New Member

    Dec 1, 2012
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    Hello everyone

    this my first post here hope it wouldn't be the last :)

    my question is about this circuit

    [​IMG]

    and

    [​IMG]

    Member "Audioguru" was commented on the post here with them and want to ask him or anyone who can help me also if it can work as FM Receiver ?

    If it doesn't Can give me another one worked and looks like it . Unfortunately required only analog in circuit :)

    Have a project after 5 days ... Hope can help me,Thanks :)
     
  2. Dodgydave

    Distinguished Member

    Jun 22, 2012
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    Last edited: Dec 2, 2012
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  3. samsam_91

    Thread Starter New Member

    Dec 1, 2012
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    hmm .. Can provide me with Simple FM Receiver ?
     
  4. bertus

    Administrator

    Apr 5, 2008
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  5. samsam_91

    Thread Starter New Member

    Dec 1, 2012
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    Thanks Bertus

    If u have another choose it will be fine :)
     
  6. DickCappels

    Moderator

    Aug 21, 2008
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    It can detect FM by slope detection. Just tune to one side of the FM signal's center frequency and you should be able to hear the modulation. A classic FM receiver has two slope detectors, one for each side of the center frequency and outputs the difference between them.

    http://electriciantraining.tpub.com/14184/css/14184_163.htm
     
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  7. Audioguru

    New Member

    Dec 20, 2007
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    I hate to say it because it has very poor performance but a Super-Regenerative FM receiver (one transistor plus an audio amplifier) can pickup local AM or FM signals.
    It slope-detects the FM (with lotsa distortion).

    Its bandwidth is too narrow (causing distortion) or too wide (causing crosstalk with a few stations). It is overloaded easily by strong local stations so it must have its feedback fiddled with. Because it detects AM and FM at the same time then it picks up static interference noise. It causes interference to other radios.
     
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