Richardcavell
Member
If I use a capacitor to filter DC from an AC signal, is it necessary for me to use a bipolar capacitor rather than a unipolar one?
Richard
Richard
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Not sure what you mean by filtering DC from an AC signal. You need to rectify the AC first to get pulsating DC then filter it with the capacitor. It doesn't need to be bipolar.
No.For small signals, polarised capacitors would work.
The one on the left, between the microphone and the base of the transistor, would be the wrong way round.
However, the values would be so small that there would not be much point in using polarised capacitors.