Trying to understand this circuit. Will this produce a representation similar to example in second image (if U_inf is the sine wave "original") ?
Assuming that, I expect U_DM to look like the "modulated" signal. How would the signal look like at point A and B ?
I'll add that the circuit (HPS modulation board) was tested with the following outputs. Increasing the U_s voltage level changed the signal to 2nd image.