I finally got rid of oscillations at Current Transformer amplifier output
I put baypass caps at Opamp power supply pins
and 100 pF caps between (-) and (out) pins
my scheme is a simple half bridge inverter circuit for driving ultrasonic transducer
in this video I show driving puls of high MOS and the CT amplifier circuit output
in the beginning of the video the inverter starts with increasing the duty to %50 from %5
it waits 3 second and then it decreases the inverter frequency from 28.5 Khz to 26.5 Khz
in 1 second
my question ; why is the zero crossing of current signal always the same with the
edges of High MOS driving signal ? it seems that the current signal is forced to zero at the edges of MOS driving signal
( my amplifier circuit takes the positive alternance of CT signal )
the ultrasonic transducer is a capacitive and inductive and resistive device
I think that at some frequencies the current must lead or lag the High MOS signal , isn't ?
thank you