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Generating DC signal proportional to the peak of a pulse

Discussion in 'General Electronics Discussion' started by Micke, Dec 20, 2016.

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  1. Micke

    Micke

    2
    0
    Dec 20, 2016
    I need to generate a DC signal that is proportional to the peak of a pulse (100 µs long). I want it to keep the DC level untill the next pulse arives (60 Hz) and then update the level.

    1. Is there a name of such device? (active or passive)
    2. do you know of any manufacturers?
    Thanks for your time/M
     
  2. Harald Kapp

    Harald Kapp Moderator Moderator

    10,993
    2,500
    Nov 17, 2011
    Welcome to EP, Micke.

    The circuit you're looking for is called a peak detector. Dtetcting the peak is comparatively simple. You'll need a means to reset the detector before the next pulse. Otherwise, if the next pulse is lower in amplitude, the peak detector will keep the higher output from the previous peak.

    I don't know a manufacturer that sells complete peak detector devices, but app-nores are easy to find, e.g. at Linear Technology, Microchip or Maxim, to name but a few.
     
  3. cjdelphi

    cjdelphi

    1,096
    104
    Oct 26, 2011
    A peak detector - a simple example, the capacitor will charge/discharge to the voltage you're sampling. .
     

    Attached Files:

  4. Micke

    Micke

    2
    0
    Dec 20, 2016
    Thanks!
     
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