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​ = 47 kΩVin​ = 1 VR1​ = 10 kΩ

The circuit is an inverting amplifier. The op-amp is ideal and runs from ±15 V supplies; its output saturates at ±13 V. Find the output voltage Vout.

Vin = 1 VR1 = 10 kΩRf = 47 kΩVsat = ±13 V
Vout = V
2.Easy
−+Vout​Rf​ = 10 kΩVin​ = 1.2 VR1​ = 2 kΩ

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

Vin = 1.2 VR1 = 2 kΩRf = 10 kΩ
Vout = V
3.Medium
−+Vout​Rf​ = 47 kΩVin​R1​ = 1 kΩ

The op-amp is ideal and runs from ±15 V supplies; its output saturates at ±12 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 = 1 kΩRf = 47 kΩVsat = ±12 V
Vin,max = V
4.Medium
−+Vout​Rf​ = ?R1​ = 1 kΩVin​

Choose the feedback resistor Rf that gives this non-inverting amplifier a voltage gain of 11.

R1 = 1 kΩAv = 11
Rf = kΩ
5.Hard
−+Vout​R2​ = 10 kΩV1​ = 1.1 VR1​ = 4.7 kΩV2​ = 1.6 VR3​ = 100 kΩR4​ = 2 kΩ

The op-amp is ideal and runs from ±15 V supplies. The resistor ratios are not matched. Find the output voltage Vout.

V1 = 1.1 VV2 = 1.6 VR1 = 4.7 kΩR2 = 10 kΩR3 = 100 kΩR4 = 2 kΩ
Vout = V
6.Hard
−+Vout​C = 0.1 µFVin​ = 2.6 VR = 2.2 kΩ

The integrator uses an ideal op-amp with ±15 V supplies; its output saturates at ±13 V. The capacitor is uncharged when a constant input Vin = 2.6 V is applied at t = 0. How long after t = 0 does the output reach saturation? Find t.

Vin = 2.6 VR = 2.2 kΩC = 0.1 µFVsat = ±13 V
t = ms

Answer key

  1. 1. Vout = −4.7 V
  2. 2. Vout = −6 V
  3. 3. Vin,max = 0.2553 V
  4. 4. Rf = 10 kΩ
  5. 5. Vout = −2.242 V
  6. 6. t = 1.1 ms

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