Darren New wrote:
> Orchid XP v8 wrote:
>> There's a big difference between recognising a DC signal, and 
>> recognising a sine tone with a specific frequency.
> 
> Oh, and yes, recognising the sine tone is far, far easier, if you use 
> analog components.

Yep. That's why all digital electronics uses this method internally.

Oh, wait a sec...

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