Re: Questions on interfacing to current sense transformer

On Jun 26, 9:18 pm, John Larkin
[....]
Many cycles, since the signals will be very noisy. You can block
integrate and then divide, or you can simulate a multipole, continuous
lowpass filter for a nice smooth analog meter effect.

You can do both. Average over lets say one cycle of the 60Hz and then
make your "analog" filter. This way your filter has a more constant
input since all of the 60Hz harmonics are gone before you get to it.

[...]
A few adc lsb's p-p. Random noise is good, but a triangle works well
too. Just make sure it's uncorrelated to the line frequency.

Watch how the noise you add and the sampling of the ADC alias. You
don't want the aliased thing to correlate to the mains frequency
either


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