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help needed in analyzing this circuit

Discussion in 'General Electronics Discussion' started by agnaatha, Mar 8, 2011.

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  1. agnaatha

    agnaatha

    2
    0
    Mar 8, 2011
    Hi all, I badly need to know what this circuit does and how it works. Please help me by explaining what the fet part, rc part does here.
    [​IMG]


    http://i52.tinypic.com/14njkv7.jpg
     
  2. davenn

    davenn Moderator

    13,901
    1,970
    Sep 5, 2009
    looks pretty much like a FET, RF amplifier followed by a diode detector and an audio amplifier :)

    have you got any more background on the cct ? where did it come from ?

    Dave
     
  3. agnaatha

    agnaatha

    2
    0
    Mar 8, 2011
    Its a question from an unknown book. In the question it is regarded as EM survey unit
    Here is the full question, dont know from which book it is..
    [​IMG]
    Sorry I should have posted this before.
     
  4. duke37

    duke37

    5,364
    772
    Jan 9, 2011
    It looks as if the circuit will not work without a DC path for the diode. Add a resistor from the junction of C and the diode to ground. It would also help if there was power to the amplifier!
     
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