Band Pass Filter Simulator

Simulate center frequency, bandwidth, and Q factor

Center f0 (Hz)

Q factor

Input f (Hz)

Band-Pass Filter Formulas

Bandwidth	BW = f0 / Q
Lower cutoff	f1 approx f0 - BW / 2
Upper cutoff	f2 approx f0 + BW / 2

Step-by-Step Example

If f0 = 1000 Hz and Q = 5, then bandwidth is 1000 / 5 = 200 Hz. The strongest response is near 1000 Hz, and the approximate passband is centered around that value.

Common Uses

Selecting a desired frequency band in audio or radio circuits.
Removing low-frequency drift and high-frequency noise at the same time.
Modeling tuned circuits and resonance behavior.
Studying how Q controls selectivity.

Frequently Asked Questions

What is a band-pass filter?▼

A band-pass filter passes a range of frequencies around a center frequency and attenuates lower and higher frequencies.

What is center frequency?▼

Center frequency is the frequency where the band-pass response is strongest.

What does Q factor mean?▼

Q factor describes how narrow or selective the passband is. Higher Q means a narrower passband.

How is bandwidth related to Q?▼

For many band-pass models, bandwidth is approximately center frequency divided by Q.

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