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.

New worksheetPractise online with hints

For teachers: free to print, copy and use in class. Every new worksheet has new values and its own answer key. A link to ExamProblems on your course page is appreciated.

Name: ____________________   Date: ____________

1.Easy
−+Vout​Rf​ = 22 kΩVin​ = 0.7 VR1​ = 10 kΩ

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

Vin = 0.7 VR1 = 10 kΩRf = 22 kΩ
Vout = V
2.Easy
−+Vout​3.5 VRs​ = 4.7 kΩRL​10 kΩIL​

A sensor behaves like a 3.5 V source with an internal resistance Rs = 4.7 kΩ. It feeds a load RL = 10 kΩ through an ideal voltage follower (unity-gain buffer). Find the load current IL supplied by the op-amp output.

Vs = 3.5 VRs = 4.7 kΩRL = 10 kΩ
IL = mA
3.Medium
−+Vout​R2​ = 22 kΩV1​ = 1.3 VR1​ = 10 kΩV2​ = 0.2 VR3​ = 10 kΩR4​ = 22 kΩ

The difference amplifier uses an ideal op-amp with ±15 V supplies, with R3 = R1 and R4 = R2. Find the voltage V− at the inverting input.

V1 = 1.3 VV2 = 0.2 VR1 = R3 = 10 kΩR2 = R4 = 22 kΩ
V− = V
4.Medium
−+Vout​Rf​ = 100 kΩR1​ = 47 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 = 47 kΩRf = 100 kΩVsat = ±12 V
Vin,max = V
5.Hard
−+Vout​C = 1 µFVin​ = −1 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 = −1 V is applied at t = 0. How long after t = 0 does the output reach saturation? Find t.

Vin = −1 VR = 2.2 kΩC = 1 µFVsat = ±13 V
t = ms
6.Hard
−+Vout​Rf​ = 100 kΩV1​ = 0.3 VR1​ = 100 kΩV2​ = −0.8 VR2​ = 22 kΩ

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

V1 = 0.3 VV2 = −0.8 VR1 = 100 kΩR2 = 22 kΩRf = 100 kΩ
Vout = V

Answer key

  1. 1. Vout = −1.54 V
  2. 2. IL = 0.35 mA
  3. 3. V− = 0.1375 V
  4. 4. Vin,max = 3.837 V
  5. 5. t = 28.6 ms
  6. 6. Vout = 3.336 V

Full step-by-step solutions: practise this topic on examproblems.com.