For Researchers · Sampling & Aliasing
Sampling & Aliasing for an EMI filter
Built for researchers prototyping or validating an idea. Prototype fast, reproduce exactly, and share a citable, interactive version of your model. Simulate an EMI filter live below — adjust the inputs and watch it respond, right in your browser.
Sampling & AliasingLive
the Nyquist theorem
Controls
Presets
To capture a signal faithfully you must sample above twice its highest frequency — the Nyquist rate. Sample too slowly and a high frequency masquerades as a lower one: aliasing. Push the signal frequency above half the sample rate and watch the reconstructed wave collapse to a false, slower tone.
Data Inspector
Nyquist frequency10.0 Hz
Statusproperly sampled
Apparent frequency3.0 Hz
Governing equation
Reading this result: Sampling at 20 Hz puts the Nyquist limit at 10.0 Hz. The 3 Hz signal sits below that, so it is captured faithfully and reconstructs at its true frequency.
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Frequently asked questions
- Is this good for researchers?
- Yes — this version of "Sampling & Aliasing for an EMI filter" is framed for researchers prototyping or validating an idea. Prototype fast, reproduce exactly, and share a citable, interactive version of your model.
- Do I need to install anything?
- No. It runs in any modern browser, free, with no account required.