Originally Posted by crutschow

As I previously noted, the circuit as designed by CR Magnetics has an output proportional to the peak of the current waveform. I suggest you use my modification on the output filter so it responds to the average value, which is less sensitive to noise and distortion.

Originally Posted by tyru

I assume your indicating the 10K resistor on the output of the quad op amplifier circuit.

Yes. It forms a low pass filter with the output capacitor which generates the average value of the filter input signal.

I added the resistor to the circuit and although it takes longer for the circuit to stabilize (not long in actual time), the reading does tend to stabilize at average VDC reading.