Aside

DTMF and Filtering

11 Apr

Here we will try to show the concept of filtering using DTMF. A DTMF signal can be considered as a sum of two frequencies as shown below:

DTMF(t) = x_{1}(t) + x_{2}(t);
where
x_{1}(t);
represents the first frequency and
x_{2}(t);
represents the second frequency.

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