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Pulse-Width modulation

Discussion in 'Electronic Design' started by vijayamurugan.P, Oct 12, 2004.

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  1. good evening

    i wish to simulate a pwm
    My waveforms are
    1. sine wave @ 50 Hz 16 v
    2.Carrier wave - Triangular wave 40v peak to peak.

    i have to implement pwm using It.
    i tried using 741 Opamp.but it misfires @ several instances
    Can Anybody suggest me a better circuit
    Thanks in Advance

  2. Tim Wescott

    Tim Wescott Guest

    If you're using the 741 as a comparator (i.e. no feedback, you just want
    the output to be high or low) consider using a _real_ comparator like an
    LM339 or an LM311. For this application they're mostly like op-amps,
    but you'll want to study the data sheets to make sure you're getting
    something fast enough and you're plugging all the right pins into the
    right places.
  3. colin

    colin Guest

    if it 'misfires' sounds like the control voltage is going outside the range
    of the sawtooth waveform.

    Colin =^.^=
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