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How do you make a first order low pass filter?

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Frequency Response of a 1st-order Low Pass Filter

This is because the reactance of the capacitor is high at low frequencies and blocks any current flow through the capacitor. After this cut-off frequency point the response of the circuit decreases to zero at a slope of -20dB/ Decade or (-6dB/Octave) \u201croll-off\u201d.

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