Press Run
The inverting amplifier example starts with its input and output on the scope.
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Free Op-Amp SimulatorBuild amplifiers and oscillators and see the waveforms.
An inverting amplifier with a gain of −10 opens ready to run: a 1 V sine goes in and comes out ten times bigger and upside down on the scope.
Change the resistors, add feedback paths or open the square wave oscillator to see the output switch between the supply rails.
Ideal op-ampSupply-limited outputScope with several traces
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THREE SIMPLE STEPS
How to use the Op-Amp Simulator
Change the gain
Select the feedback resistor and type a new value: the gain is −Rf/Rin. Turn the input up to see the output clip at the supply voltages.
Build your own
Add op-amps, resistors and capacitors to make non-inverting amplifiers, comparators, integrators or oscillators.
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Op-Amp Simulator FAQ
How does the op-amp behave?
Like an ideal op-amp: very high gain, no input current and an output limited to the positive and negative supply voltages you set. With negative feedback it keeps both inputs at the same voltage.
How do I make an inverting amplifier?
Connect the input through Rin to the − input, Rf from the output back to the − input, and the + input to ground. The gain is −Rf/Rin: 10 kΩ and 1 kΩ give −10.
Can I make an oscillator?
Yes. Open the op-amp square wave oscillator example: a capacitor charges through a resistor until it crosses the threshold set by positive feedback, and the output flips between the rails.
Why does my output stop at a fixed voltage?
The output can't go beyond the supply voltages. Raise the op-amp's highest and lowest output in its settings, or lower the gain or input.
Is it free?
Yes, with no sign-up. It runs in your browser, and you can save circuit files, share a link or download a PNG of the schematic.
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Free Op-Amp Simulator
Ideal op-amp · Supply-limited output · Scope with several traces