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Backwards Sawtooth waveform

  1. Nov 28, 2007 #1
    Hello All,

    Does anyone know of a simple circuit (with op-amps or something) that can generate a backwards sawtooth waveform? In otherwords, the waveform would have a sharp rise time and then slop off linearly. (see attachment).

    Thanks,
    Jason O
     

    Attached Files:

  2. jcsd
  3. Nov 28, 2007 #2

    berkeman

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    Staff: Mentor

    Maybe generate a traditional sawtooth (integrate and dump), then invert it and offset it? Would that work?
     
  4. Nov 28, 2007 #3
    Hi Berkeman,

    Ok, here's what I came up with. Looks like it is working :smile:. Does anyone know of any other ways to do this that may be simpler?

    Thanks,
    Jason O
     

    Attached Files:

  5. Nov 28, 2007 #4

    berkeman

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    Staff: Mentor

    Simpler.... How about a single 8-bit downcounter with an R-2R ladder DAC configuration at the output.....
     
  6. Nov 28, 2007 #5
    Hmmmm...... that could work :-). I wonder what kind of frequency range I can get from that. I would definitely need to buffer the output. Interesting approach.

    Thanks,
    Jason O
     
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