Hi Folks, 
I'm looking for a tone detect switch implemented in a small PIC to detect 
CTCSS / PL 'subaudio' tones (from  about 70Hz to 200Hz with a tolerance 0.08%
is the spec ), ideally it would have the option to generate these tones too.
I have found a tone encoder using a 16F84, but nothing that decodes.
any offers?.
thanks

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