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Externally compensated operational amplifier

LM301A Working Principle

Learn how LM301A works with an illustrated explanation and practical readings.

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LM301A at a glance

Follow the labeled connections and functional stages

LM301A working principle: illustrated functional stages, basic circuit and connections
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How it works

3 stages · Explore one step at a time

Step 1 / 3

Compare the inputs

The differential stage responds to the voltage between IN+ and IN−.

Step 2 / 3

Choose compensation

The external capacitor shapes loop response. The illustrated 30 pF connection is between pins 1 and 8; keep it short.

Step 3 / 3

Close the feedback loop

Negative feedback makes the nominal DC gain 1 + 90 kΩ / 10 kΩ = 10. Real offset, bias current, bandwidth and loading cause error.

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