Ake Hedman wrote:
> My thought was to also remove ripple in software.

While theoretically possible, I think this is going to be very difficult and
result in significant errors in practise.  The A/D sampling would have to be
precisely timed with the PWM period to get consistant results, but then you
wouldn't know what those results meant because there would be a net sampling
bias on the PWM signal.  Use 2 or 3 poles of low pass filter and an opamp
buffer.


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