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Find the output voltage and the input impedance

Discussion in 'General Electronics Discussion' started by Aser11, Nov 30, 2015.

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  1. Aser11

    Aser11

    2
    0
    Nov 20, 2015
    upload_2015-11-30_16-24-7.png
    My solution is
    upload_2015-11-30_16-25-38.png
    I want to make sure my answer is right.Can you please help me out ?
     
  2. Ratch

    Ratch

    1,073
    327
    Mar 10, 2013
    Your answer is wrong. You are losing 250 microamps of current from the 2.5 volts going through R3. That has to be made up from extra current present in R4. That will increase the voltage across R4 by 3.75 volts, making the correct answer 10 - 1.5 Vin. You can also calculate the correct answer by Thevenizing the input circuit and doing the calculation from the Thevenin resistance and open circuit voltage.

    Ratch
     
  3. Aser11

    Aser11

    2
    0
    Nov 20, 2015
    Thanks Ratch
     
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