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​ = 4.7 kΩVin​ = 2 VR1​ = 2 kΩ

The circuit is an inverting amplifier. The op-amp is ideal and runs from ±15 V supplies; its output saturates at ±12 V. Find the output voltage Vout.

Vin = 2 VR1 = 2 kΩRf = 4.7 kΩVsat = ±12 V
Vout = V
3.Medium
−+Vout​Rf​ = 100 kΩVin​R1​ = 10 kΩ

The op-amp is ideal and runs from ±15 V supplies; its output saturates at ±13 V. The inverting amplifier is driven by a sine wave. Find the largest input amplitude Vin,max (peak value) for which the output does not clip.

R1 = 10 kΩRf = 100 kΩVsat = ±13 V
Vin,max = V
4.Medium
−+Vout​Rf​ = 22 kΩR1​ = 1 kΩVin​

The op-amp is ideal and runs from ±15 V supplies; its output saturates at ±12 V. The non-inverting amplifier is driven by a sine wave. Find the largest input amplitude Vin,max (peak value) for which the output does not clip.

R1 = 1 kΩRf = 22 kΩVsat = ±12 V
Vin,max = V
5.Hard
Vin​V1​Vout​stage 1: invertingR1​ = 4.7 kΩRf1​ = 47 kΩstage 2: non-invertingR2​ = 4.7 kΩRf2​ = 4.7 kΩ

Two ideal op-amp stages are connected in cascade: an inverting amplifier (R1, Rf1) followed by a non-inverting amplifier (R2 to ground, Rf2 in the feedback). Both run from ±15 V supplies. The input is Vin = 0.05 V. Find the output voltage Vout.

R1 = 4.7 kΩRf1 = 47 kΩR2 = 4.7 kΩRf2 = 4.7 kΩVin = 0.05 V
Vout = V
6.Hard
Vin​V1​Vout​stage 1: invertingR1​ = 2 kΩRf1​ = 2 kΩstage 2: non-invertingR2​ = 10 kΩRf2​ = 22 kΩ

Two ideal op-amp stages are connected in cascade: an inverting amplifier (R1, Rf1) followed by a non-inverting amplifier (R2 to ground, Rf2 in the feedback). Both run from ±15 V supplies. Find the overall voltage gain Av = Vout/Vin.

R1 = 2 kΩRf1 = 2 kΩR2 = 10 kΩRf2 = 22 kΩ
Av =

Answer key

  1. 1. Vout = −4.255 V
  2. 2. Vout = −4.7 V
  3. 3. Vin,max = 1.3 V
  4. 4. Vin,max = 0.5217 V
  5. 5. Vout = −1 V
  6. 6. Av = −3.2

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