Instrumentation and Control

Discussion in 'Homework Help' started by JTSU, Mar 27, 2015.

  1. JTSU

    Thread Starter New Member

    Mar 27, 2015
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    Hi, I'm stuck on a question and cant seem to find any help online, The question concerns this operational amplifier. I have to calculate the required component values to get the Vout that is shown on the image. Unfortunately I cannot find any of the equations in any of the textbooks or in my notes as I missed this lecture, any help would be great thanks, I really cant attempt this question as i have no idea where to start :(



    [​IMG]
     
  2. ericgibbs

    AAC Fanatic!

    Jan 29, 2010
    2,503
    380
    hi,
    Look at this image of an Integrator circuit.
    E
     
  3. JTSU

    Thread Starter New Member

    Mar 27, 2015
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    0
    I'm not really sure what to make of the image, I can calculate the Vout if i had the component values but I can't seem to backtrack and do it in the reverse order
     
  4. Papabravo

    Expert

    Feb 24, 2006
    10,142
    1,790
    If I tell you that the solution is not unique does that help? That means there are a countable infinity of RC pairs that satisfy the requirement.
     
  5. ericgibbs

    AAC Fanatic!

    Jan 29, 2010
    2,503
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    I expect during the missed lesson the teacher would have suggested a typical value for R.

    You know that 18 = 1/[R * C], why not try R1 = 10K or 100K and see what values of C result.
    Did the teacher give any idea of the Vin or the t0 , t1 times so that you could calc Vout.?
     
  6. Papabravo

    Expert

    Feb 24, 2006
    10,142
    1,790
    Actually 1% resistors are way more common than 1% capacitors. I'd select a generic NPO capacitor in the .1 ufd to 1 ufd range and then use the nearest 1% resistor.
     
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