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.

-- 
Darren New, San Diego CA, USA (PST)
   The question in today's corporate environment is not
   so much "what color is your parachute?" as it is
   "what color is your nose?"

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