Hi all. A transformer is driven with a square wave pulse. The transformer has three secondary coils all in series, a diode is placed between two of them which is forward biased during the on time. The coils are used to charge a capacitor and limit current. When the transformer is pulsed an Amplitude modulated AC waveform appears across each secondary coil... Can anyone explain why this occurs??? The AM waveform also appears across the capacitor? -How can this occur when the circuit has a diode in it?