Voltage comparator and PWM generator

Discussion in 'General Electronics Chat' started by rochak.chadha, Mar 18, 2012.

  1. rochak.chadha

    Thread Starter New Member

    Mar 17, 2012
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    0
    Hi ,

    I am working on a feedback control application for a DC DC converter. I need to make a small circuit, which can sense 2 voltages (both in the range 50 - 74 V)
    and generate a PWM signal whose duty cycle is proportional to the voltage difference.

    The challenge is that I need to make this completely analog, i.e. I cannot use any ADCs or micro controllers.

    I am just looking for ideas in terms of block diagrams and I am ready to do the menial op amp calculations myself.

    Thanks for your help people !
     
  2. BillB3857

    Senior Member

    Feb 28, 2009
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  3. Ron H

    AAC Fanatic!

    Apr 14, 2005
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    Is this homework?
     
  4. rochak.chadha

    Thread Starter New Member

    Mar 17, 2012
    7
    0
    Thanks Bill, the link was really helpful

    Ron its not exactly a homework but more of a project
     
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