Hello, I'm an amateur. I'm curious how to increase the integrity of a pulsed DC signal from a mosfet. I have a IRFZ44N that is simply turning a LED on and off. It works fine. When I measure across the LED
with an oscilloscope I see a bit of a wobble in the signal at 0V, see the attachment called without_cap.jpg (circled in green).
So I add a cap in parallel with the LED and then I get with_cap.jpg which helps smoothen out the 0V signal (green circle) but the drop off is curved more (the purple circle) now. Being a novice I don't know what to do to try to get it to cleanly drop off and keep the signal flat when theres suppose to be no voltage. Anyone know what I'm talking about or what would be causing this?
with an oscilloscope I see a bit of a wobble in the signal at 0V, see the attachment called without_cap.jpg (circled in green).
So I add a cap in parallel with the LED and then I get with_cap.jpg which helps smoothen out the 0V signal (green circle) but the drop off is curved more (the purple circle) now. Being a novice I don't know what to do to try to get it to cleanly drop off and keep the signal flat when theres suppose to be no voltage. Anyone know what I'm talking about or what would be causing this?
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