5th March 2010 05:52 PM
I am not real knowledgeable about this stuff but I just assumed that a summing amp to combine the two frequencies but looking at the wave forms I wonder if I really need two filters?
Yes I have a 60db loss between 300khz to about 2khz or there abouts.
Not sure of other frequencies. That,s why I started with the speech BPF (If I recall the top filter is the speech BPF
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