Op amp Help

Discussion in 'Homework Help' started by honestly_maybe, Mar 22, 2010.

  1. honestly_maybe

    Thread Starter New Member

    Mar 22, 2010
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    [​IMG]I've to find Vout(see the attachment) ... my professor says it will be zero and I'm not convinced.. any suggestions ???
     
  2. beenthere

    Retired Moderator

    Apr 20, 2004
    15,815
    282
    No power is shown; bound to be zero. Try powering the op amps and give us your analysis of the circuit.
     
  3. jlcstrat

    Active Member

    Jun 19, 2009
    58
    3
    I assume it's due to the fact that opamp2 input is grounded. I would think there would still be an output myself though, but I guess the high impedance of the input is blocking all the current. Hopefully someone else can clear it up.
     
  4. honestly_maybe

    Thread Starter New Member

    Mar 22, 2010
    2
    0
    see..I discussed this question with my prof. in the classroom. He says the output is gonna be 0V and when I saw the solution manual of the book it says it should be 5/3 volts.
    It's really confusing me.
     
  5. The Electrician

    AAC Fanatic!

    Oct 9, 2007
    2,284
    328
    The ground on the input of the second opamp trumps everything else. The output is zero.

    That ground is also a short circuit on the output of the first opamp.

    If that ground weren't there, then the output would be 5/3 volts.
     
  6. Audioguru

    New Member

    Dec 20, 2007
    9,411
    896
    No. The circuit is incomplete.
    The output will always be 0V because the opamps are not powered and their part number is not shown.
     
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