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analog filter · op-amp circuit · schematic

Second-Order Butterworth Low-Pass Filter

Type Circuit schematicStandard IEEE Std 315 / ANSI Y32.2Engine schematex-circuitUpdated 9/19/2026
Second-Order Butterworth Low-Pass Filter
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The scenario

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

What is in this drawing

Read the decisions behind it.

01

Used multiple feedback topology for stable Q and lower component sensitivity.

02

Selected component values to achieve Butterworth damping factor of 0.707.

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

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