How do I simulate an op-amp filter?

Open this page and use the live Active Filter (Bode) tool below — set your inputs and the simulation runs instantly in your browser using real numerics. No install, no account needed.

Yes. The simulation runs free in your browser. A one-time unlock or a Pro plan adds advanced parameters, saved presets, data import, and clean exports.

Can I use my own numbers?

Absolutely — every input is adjustable, and with data import you can drive an op-amp filter from your own measurements.

Use case · powered by Active Filter (Bode)

Active Filter (Bode) for an op-amp filter

Simulate an op-amp filter live in your browser. This runs the real Active Filter (Bode) solver — adjust the inputs, watch it respond instantly, and export the result. No install, no account.

For:Students Researchers Educators Engineers Hobbyists & Makers K-12 Students First Responders

Active Filter (Bode Plot)Live

shaping a frequency response

Controls

Type

Presets

Cutoff fc (Hz)

Filter order

A filter passes some frequencies and blocks others. The cutoff fc = 1/(2πRC) is where the response falls 3 dB; beyond it the magnitude rolls off at 20 dB per decade per order — steeper filters cut harder. Educational tool.

▶ Run in Python

Data Inspector

Cutoff frequency1.0 kHz

Roll-off40 dB/decade

At 10×fc-40 dB

Governing equation

∣ H (f) ∣ = \frac{1}{1 + ( f /1000 ) ^{4}}

Reading this result: The −3 dB cutoff sits at 1.0 kHz, where the low-pass response begins to roll off. Order 2 sets the steepness at 40 dB/decade — a gentle slope that eases into the stopband with minimal ringing. Raising the order steepens the roll-off while adding phase lag around the cutoff.

Runs locally in your browser — free forever. Scale to the cloud when reality gets heavy.

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About this simulation

The full Active Filter (Bode) tool models an op-amp filter with the same numerics engineers and scientists use — running entirely client-side. Change any parameter and the result updates in real time, so you can build intuition, check a design, or teach the concept without spreadsheets or installs.

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Other ways to simulate an op-amp filter

Fourier Transform for an op-amp filter Bode Plot for an op-amp filter Filter Designer for an op-amp filter PID Controller for an op-amp filter Transmission Line for an op-amp filter Op-Amp Circuits for an op-amp filter

Frequently asked questions

How do I simulate an op-amp filter?: Open this page and use the live Active Filter (Bode) tool below — set your inputs and the simulation runs instantly in your browser using real numerics. No install, no account needed.
Is it free?: Yes. The simulation runs free in your browser. A one-time unlock or a Pro plan adds advanced parameters, saved presets, data import, and clean exports.
Can I use my own numbers?: Absolutely — every input is adjustable, and with data import you can drive an op-amp filter from your own measurements.