# average value of as square wave

1. ## average value of as square wave

Hi,

This might seem silly but I need a circuit to detect the average value of a square waveform (0-1V), with frequencies below 20KHz. The duty cycle is not 50%.

Thanks  Reply With Quote

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2. ## Re: average value of as square wave

Vmean=Vpeak*(thau/Period)

thau:duty cycle  Reply With Quote

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3. ## Re: average value of as square wave

Hi,

A low pass filter?

Klaus  Reply With Quote

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4. ## Re: average value of as square wave

I know the relationship. need a circuit.  Reply With Quote

5. ## Re: average value of as square wave

Thanks, KlausST. Could you plz introduce a source that explains the design procedure?  Reply With Quote

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6. ## Re: average value of as square wave

Hi,

This is done all the time with power converters where the switch voltage is averaged out by the low-pass filter (output filter). You just need a low-pass filter that is 'good enough' to bring the ripple to an acceptable level.

1 members found this post helpful.  Reply With Quote

7. ## Re: average value of as square wave

Hi,

What "design procedure" ? ...for two parts: R, C.

R C low pass filters are explained million times in the internet, since it's probably the most used circuit.

Klaus  Reply With Quote

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