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Amplitude Modulation of a wave
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[QUOTE="ehild, post: 4956876, member: 481"] If the sum of two signals of different frequencies ω[SUB]1[/SUB] and ω[SUB]2[/SUB] is the input of a linear network, the output would be again the sum of two signals with the same frequencies. Using a nonlinear device, one, for example, that produces the square of the input, it will "mix" the frequencies. Expand (Asin(ω[SUB]1[/SUB]t) + Bsin(ω[SUB]2[/SUB]t ))[SUP]2[/SUP], what do you get? ( there will be components with frequencies of 2ω[SUB]1[/SUB], 2ω[SUB]2[/SUB], ω[SUB]1[/SUB]+ω[SUB]2[/SUB], ω[SUB]1[/SUB]-ω[SUB]2[/SUB]). Semiconductor diodes, transistors have nonlinear characteristics, and can be used for "mixing frequencies" [/QUOTE]
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Amplitude Modulation of a wave
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