ANALOG FILTER

Second-Order Butterworth Low-Pass Filter

A worked analog filter example, rendered live. Open it in the AI editor and adapt it to your own case.

UPDATED 2026-09-19
EXAMPLESecond-Order Butterworth Low-Pass Filter
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CASE ANALYSIS

Scenario

Designing an active analog low-pass filter to attenuate high-frequency noise while maintaining a flat passband.

Key decisions

  • Used multiple feedback topology for stable Q and lower component sensitivity.
  • Selected component values to achieve Butterworth damping factor of 0.707.

When to reuse this

Use when a second-order Butterworth low-pass characteristic is needed in signal conditioning, audio, or sensor applications.

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