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Sun Jan 9 11:04:16 EST 2011

RF envelope generator

So, (following part of Gert's reasoning) what about using the
amplitude of a very high frequency sinusoid as the output of a
circuit?

I.e. if DC is a problem, let's modulate it up.  A decaying exponential
can also be generated using a 2-pole circuit followed by a
peak-detecting demodulator.

The problem with this is that for very long decay times, the poles
become very sharp, which leads to unstability due to noise and
non-linearities.



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