Hi everyone
So i have a large design that involve high voltage generation among other stuff ( a lot of analogue measurement, micro current measurement, stepper motor control and AC motor command via triac or relay ) and it's sensitive application that need some security.
What am worried about is EM, for years i have read AN that talk about EM and how to immune the board from it. Still a bit a mystery for me though. So any rule of thumb when designing a board, am totally aware that it's almost every time case depending. That include ground plan, track clearance, impedance , paralleled track ... but am not sure how each parametre influence for better immunity or worst.
The second thing is the micro current measurement, i saw a board that do the same and the designer separate this particular circuitry from the ground plane and put it in a separate ground plane with large clearance between both, it still the same ground cause they are connected with a single track. Does this help in anyway giving a cleaner ground reference. Does it help to put a inductor to connect both ground.
Thanks