Is it possible to generate a sine wave like this? I tried combining 50hz, 100hz and 200hz together but I did not get something like this picture that I provided here.
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Bjorn Gustavsson on 4 Aug 2022
Yes it is possible. You will have to make the phase-angle match at the frequency transitions (for simplicity make the time-windows an even number of periods for all three frequencies). And you will have to think about what you get at the transitions.