OP-AMP design

Discussion in 'Homework Help' started by bluewarrior, Mar 21, 2010.

  1. bluewarrior

    Thread Starter New Member

    Mar 21, 2010
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    hi!
    i badly need help in this assignment our professor gave the class
    Design a circuit that will perform the given operation: Vo=4Vi1+(3Vi2-Vi3)-5Vi4+(1/3)(Vi5+6Vi6+3Vi7)
     
  2. atferrari

    AAC Fanatic!

    Jan 6, 2004
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    Is it to be solved with opamps or with micros? I hope you know that at least.

    Any limits on components or is it that all what you have to start solving it? I doubt so...
     
    Last edited: Mar 21, 2010
  3. Wendy

    Moderator

    Mar 24, 2008
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    It sounds like he wants an analog computer. While it could probably be done with one op amp, it would be a lot easier to break it up into chunks and use several.
     
  4. steveb

    Senior Member

    Jul 3, 2008
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    I agree with Bill. It's basically an analog computation, and a simple one at that since there are no integrals, derivatives etc.

    I recommend looking up opamp based inverting-amplifiers and summing-amplifiers. These can be combined to produce the desired functionality.
     
  5. Wendy

    Moderator

    Mar 24, 2008
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    http://www.allaboutcircuits.com/vol_3/chpt_8/index.html

    The AAC book has a pretty good section on op amps, and I bet your text book covers the details as well.

    Gain of the op amp is multiplication/division, while summer circuits are adders, inverters will cover subtractions.
     
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