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I have a question regarding DC offset addition. I have a sine wave of Peak amplitude 2V. Now i have a DC signal of 0.4v. How do i add this DC signal to my sine wave?

Similarly i'm having another sine wave of 2Vpeak but phase shifted by 180 from the first one. Now again i have 0.4v DC signal which needs to be subtracted from this sine wave.

Can anyone provide a schematic or a link to any circuit which can do the above job? Please

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# DC offset

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