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Output voltage lag in AC RC low-pass filter

1talic

Mar 12, 2017
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Mar 12, 2017
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Hi,

Can anyone help simply explain to me why the output waveform in an AC RC low-pass filter circuit lags behind the input signal waveform?

Thanks in advance!
 

Harald Kapp

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Nov 17, 2011
13,656
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Nov 17, 2011
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A rather simplistic explanation: the resistor limits the current available to flow into or out of the capacitor therefore it takes some time for a change in input voltage to appear at the output.
 
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