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​ = 100 kΩVin​ = −1 VR1​ = 22 kΩI1​

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

Vin = −1 VR1 = 22 kΩRf = 100 kΩ
I1 = mA
2.Easy
−+Vout​Rf​ = ?Vin​R1​ = 2.2 kΩ

An inverting amplifier with an ideal op-amp must have a voltage gain of −2.5. The input resistor is R1 = 2.2 kΩ. Find the feedback resistor Rf.

Av = −2.5R1 = 2.2 kΩ
Rf = kΩ
3.Medium
−+Vout​Rf​ = 47 kΩR1​ = 4.7 kΩVin​ = −0.7 V

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

Vin = −0.7 VR1 = 4.7 kΩRf = 47 kΩ
Vout = V
4.Medium
−+Vout​Rf​ = 47 kΩR1​ = 4.7 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 = 4.7 kΩRf = 47 kΩVsat = ±12 V
Vin,max = V
5.Hard
−+Vout​Rf​ = 10 kΩV1​ = 1.9 VR1​ = 47 kΩV2​ = 0.1 VR2​ = 22 kΩ

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

V1 = 1.9 VV2 = 0.1 VR1 = 47 kΩR2 = 22 kΩRf = 10 kΩ
Vout = V
6.Hard
Vin​V1​Vout​stage 1: invertingR1​ = 1 kΩRf1​ = 4.7 kΩstage 2: non-invertingR2​ = 22 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 = 1 kΩRf1 = 4.7 kΩR2 = 22 kΩRf2 = 22 kΩ
Av =

Answer key

  1. 1. I1 = −0.04545 mA
  2. 2. Rf = 5.5 kΩ
  3. 3. Vout = −7.7 V
  4. 4. Vin,max = 1.091 V
  5. 5. Vout = −0.4497 V
  6. 6. Av = −9.4

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