Envelope detector

Discussion in 'Wireless & RF Design' started by Mannipuccho, Jan 22, 2015.

  1. Mannipuccho

    Thread Starter New Member

    Nov 6, 2014
    24
    1
    Hi guys please I am trying to simulate an envelope detector on LTspice but I don't seem to be getting it right, please can anyone help me out with a good envelope detector circuit that is easily simulated on Ltspice.

    Regards
     
  2. MrChips

    Moderator

    Oct 2, 2009
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    Like so?

    [​IMG]
     
  3. Mannipuccho

    Thread Starter New Member

    Nov 6, 2014
    24
    1
    Please do you want to help ?
     
  4. sheldons

    Active Member

    Oct 26, 2011
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    Excuuuuuze meeeeeeee that is MY circuit and is copy protected......by a huge dog with four very fast legs.....
     
  5. bertus

    Administrator

    Apr 5, 2008
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  6. skeptic

    Active Member

    Mar 7, 2010
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    The simplest envelop detector is a half wave rectifier with a capacitor used in power supplies. Scale that for the frequency you want to use with an appropriate diode and capacitor and you have your envelope detector.
     
  7. DickCappels

    Moderator

    Aug 21, 2008
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    Please post your LTSpice model so you can obtain better feedback.
     
  8. Mannipuccho

    Thread Starter New Member

    Nov 6, 2014
    24
    1
    This is the circuit I used and it is working for me so far.
     
  9. DickCappels

    Moderator

    Aug 21, 2008
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    Change your signal frequency to 1 kHz and it starts detecting.

    [​IMG]
     
  10. Mannipuccho

    Thread Starter New Member

    Nov 6, 2014
    24
    1
    Thank you DickCappels, please one question do you have idea how to simulate PLL detector on LT spice ?
     
  11. DickCappels

    Moderator

    Aug 21, 2008
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    Since I am not well schooled on LT SpticeI would either use the approach of using a predefined PLL model (if one can be found) or more typically, make a PLL out of the parts in the library.
     
  12. KL7AJ

    AAC Fanatic!

    Nov 4, 2008
    2,039
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    That's one of the best electronic puns I've ever seen...and I've been PUNishing radio folks for a long time.
     
  13. w2aew

    Member

    Jan 3, 2012
    219
    64
    Here's a video of a very simple RF amplitude detector:

     
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