Troubleshooting (Inverting Op-amp)

Discussion in 'Homework Help' started by billy1492, Apr 17, 2012.

  1. billy1492

    Thread Starter New Member

    Mar 27, 2012
    R1=1kΩ, R2=10kΩ, R3=910Ω
    Determine the effect on the output if the circuit shown has the following fault (one fault at a time)
    a. Output pin is shorted to the inverting input.
    b. R3 is open.
    c. R3 is 10kΩ instead of 910Ω.
    d. R1 and R2 are swapped.
    I have no idea what the answer to "a" is. I believe the answer to "b" is the output signal would be in saturation. I believe the answer to "c" is there would be no change. Finally I believe the answer to "d" is the closed loop gain would decrease significantly. Please let me know if any of my answers are correct and what the solution to "a" might be. Any help with this would be greatly appreciated. Thank You
    P.S. Here is a link to a schematic similar to the one in my book
  2. panic mode

    Senior Member

    Oct 10, 2011
    "output pin shorted to inverting input" is same as saying R2=0
    billy1492 likes this.