How to make an offset of 20V to change voltage of ac signal

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i have a circuit with supply voltage of 10v, and i need to make an offset of about 20v to change the output voltage of the ac signal , is there anyway to do so.

regards
 

Re: Offset

You will need another power supply or circuit. A simple voltage doubler might work. Put the AC output of your system through a series capacitor. Then connect a large value resistor from your 20V to the far side of the capacitor. You will end up with an AC signal with a 20V average offset.
 

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