I'm using AD734 multiply a DC voltage (in X input) with a 10V peak 400Hz AC signal. and this is my schematic
and i'm trying to use W=(X1-X2)(Y1-Y2)/10 topology. (Y1-Y2)=10 Vp ( measured with Multimeter). As you can see, im trying to make an AC signal with (X1-X2) controlled Peak to Peak.
The problem is there is some non linearity errors. Even i can see non zero output with ((X1-X2)=0).
This is the signal
Blue is the Career (Y1-Y2)
Orange is Output. and (X1-X2)=0
Q:Is there any way to set BW to 500Hz?
Q:The nonzero output with zero input is normal?
Q:What can be solution for noisy harmonics except filter?