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​ = 10 kΩVin​ = −1.9 VR1​ = 4.7 kΩI1​

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

Vin = −1.9 VR1 = 4.7 kΩRf = 10 kΩ
I1 = mA
2.Easy
−+Vout​Rf​ = 4.7 kΩVin​ = −1.6 VR1​ = 1 kΩ

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

Vin = −1.6 VR1 = 1 kΩRf = 4.7 kΩ
Vout = V
3.Medium
−+Vout​Rf​ = 4.7 kΩVin​R1​ = 2 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 = 2 kΩRf = 4.7 kΩVsat = ±13 V
Vin,max = V
4.Medium
−+Vout​Rf​ = ?R1​ = 100 kΩVin​

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

R1 = 100 kΩAv = 11
Rf = kΩ
5.Hard
−+Vout​Rf​ = 2 kΩV1​ = 2 VR1​ = 4.7 kΩV2​ = 1.6 VR2​ = 1 kΩ

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

V1 = 2 VV2 = 1.6 VR1 = 4.7 kΩR2 = 1 kΩRf = 2 kΩ
Vout = V
6.Hard
−+Vout​Rf​ = 10 kΩV1​ = 1.6 VR1​ = 4.7 kΩV2​ = 1.8 VR2​ = 2 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 = 1.6 VV2 = 1.8 VR1 = 4.7 kΩR2 = 2 kΩRf = 10 kΩ
If = mA

Answer key

  1. 1. I1 = −0.4043 mA
  2. 2. Vout = 7.52 V
  3. 3. Vin,max = 5.532 V
  4. 4. Rf = 1000 kΩ
  5. 5. Vout = −4.051 V
  6. 6. If = 1.24 mA

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