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3894 Views 2 Replies Latest reply: Jul 31, 2014 9:33 PM by NoSmokeToday RSS
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Jun 25, 2014 9:58 PM

Best Way to Amplify a Triangle Wave

I have a 3Vpp wave that I would like to amplify to 50-100Vpp. I was using a transformer but after a few tries, i got to think that this was nowhere near being the right way. Can anyone offer some advice?

 

Thanks!

  • mrtibbs Novice 13 posts since
    May 21, 2014
    Currently Being Moderated
    Jun 26, 2014 10:10 AM (in response to Riley)
    Best Way to Amplify a Triangle Wave

    Why don't you just try using an op-amp?  Bias the op-amp according to the specifications on the data sheet.  Then just use two resistors to obtain a gain between 50-100Vpp.  Try looking up inverting/noninverting op-amp configurations for help.

    • NoSmokeToday Novice 2 posts since
      Dec 14, 2011

      You say nothing about things like, DC component, linearity, output impeadence, frequency.

       

      Also, it's not clear if you mean that final output can be  anywhere from 50-100VPP or if you need it to be variable [from 50VPP to  100VPP].

       

      But if it's merely a low frequency, Voltage Amp that you  require [i.e. only small amount of drive current, required]  and if you  can get by with "reasonable" linearity [i.e. mild distortion not an  issue],

       

      with no DC component to deal with, then I suggest a  2-stage approach. First stage op-amp to get the signal to around 27VPP,  then a common emitter class-A final stage.

       

       

      Check out the following simulation:

       

      https://www.circuitlab.com/circuit/ky4959/amptrianglewavetohighvolt/

       

      What mrtibbs didn't mention is that you will need a fairly high voltage op-amp to so it with just an op-amp(s).

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