Op-amp circuits worksheet with answers

Free printable Op-amp circuits worksheet: 6 problems from easy to exam level, with an answer key. Print it or save it as a PDF.

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1.Easy
−+Vout​Rf​ = 100 kΩVin​ = −2 VR1​ = 47 kΩ

The op-amp is ideal and runs from ±15 V supplies. Find the output voltage Vout.

Vin = −2 VR1 = 47 kΩRf = 100 kΩ
Vout = V
2.Easy
−+Vout​Rf​ = 47 kΩVin​ = −0.3 VR1​ = 10 kΩI1​

The op-amp is ideal and runs from ±15 V supplies. Find the current I1 through R₁, flowing towards the op-amp.

Vin = −0.3 VR1 = 10 kΩRf = 47 kΩ
I1 = mA
3.Medium
−+Vout​Rf​ = ?R1​ = 10 kΩVin​

Choose the feedback resistor Rf that gives this non-inverting amplifier a voltage gain of 51.

R1 = 10 kΩAv = 51
Rf = kΩ
4.Medium
−+Vout​Rf​ = ?R1​ = 2 kΩVin​

Choose the feedback resistor Rf that gives this non-inverting amplifier a voltage gain of 10.

R1 = 2 kΩAv = 10
Rf = kΩ
5.Hard
−+Vout​Rf​ = 22 kΩV1​ = −0.3 VR1​ = 2 kΩV2​ = −1.6 VR2​ = 47 kΩ

The summing amplifier uses an ideal op-amp with ±15 V supplies. Find the output voltage Vout.

V1 = −0.3 VV2 = −1.6 VR1 = 2 kΩR2 = 47 kΩRf = 22 kΩ
Vout = V
6.Hard
−+Vout​Rf​ = 47 kΩV1​ = 0.3 VR1​ = 2 kΩV2​ = 1.2 VR2​ = 100 kΩIf​

The summing amplifier uses an ideal op-amp with ±15 V supplies. Find the current If through the feedback resistor, flowing towards the output.

V1 = 0.3 VV2 = 1.2 VR1 = 2 kΩR2 = 100 kΩRf = 47 kΩ
If = mA

Answer key

  1. 1. Vout = 4.255 V
  2. 2. I1 = −0.03 mA
  3. 3. Rf = 500 kΩ
  4. 4. Rf = 18 kΩ
  5. 5. Vout = 4.049 V
  6. 6. If = 0.162 mA

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