## Amplitude Sweep?

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hello guys,

I am trying to generate Amplitude Sweep Signal, at a given constant frequency with the following equation

X(n) = 10^{(start_amp + Delta.k.t)/20} * Sin(2.pi.f .t) * (1<<24)

but i am not getting exact Amplitude sweep signal, can any one know whats wrong with above formula....

If there exist a better way of generating Amplitude sweep signal with a specific formula, please explain

Thanks in Advance....[/size]