Low-pass

Low-pass filter design tool

Low-pass filter design tool
  1. How do you make a low-pass filter?
  2. Which low-pass filter is best?

How do you make a low-pass filter?

A simple 1st order low pass filter can be made using a single resistor in series with a single non-polarized capacitor (or any single reactive component) across an input signal Vin, whilst the output signal Vout is taken from across the capacitor.

Which low-pass filter is best?

A capacitive low-pass filter requires an extra resistance in series with the source, whereas the inductive low-pass filter does not. In the design of a high-current circuit like a DC power supply where additional series resistance is undesirable, the inductive low-pass filter is the better design choice.

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