Hello,
it might be a stupid question since I found nothing after several days of searching.
Basically, what has been confusing to me is the ground connection of the chip. in the current mode, as the drawing shows, output buffer together with external device forms a nominal current regulation loop. However, the feedback is connected to the chip reference point, which in my understanding should be vss/ground. Is the chip vss connected to the ground plane? or indeed it is floating, but guess that's not nice for the p-substrate.
thanks in advance for reviewing my question and I am looking forward to your answers.
Best regards,
Shimin
