Can someone explain the difference between signal ground, analog ground, digital ground, earth ground, system ground, chassis ground in a board and a complete system. How do they interact. Explain it to me like a 10 year old cos this is really weird concept hearing it from 2 different people. I think Chassis ground=system ground- this is where you ground all your capacitive filters and power supply filters. Analog ground should be seperated from chassis ground on a PCB and should join at start ground point. Please let me know. Thanks..