Grounding
What is ground? Ground is an infinite source or sink of charge.
I still get this topic super confused.
Learning again through the Circuit Designer’s Handbook.
ORIGIN: This term is derived from electrical engineering practice, when the reference point is often taken to a copper spike literally driven into the ground.
https://www.youtube.com/watch?v=zLW_7TPf310&ab_channel=RimstarOrg
Important Distinction
When you ground something, the object will have a potential of 0. This does NOT mean that the charge is 0.
Explanation: Assume voltage of earth is 0 because it is so large.
Conductor connected to the ground via an ideal wire, you are basically saying that the potential of the conductor is 0.
When to Consider Grounding in PCB Design
In a working circuit, there can only ever be one point which is truly at 0V.
A 0V rail is a contradiction. This is because no perfect Conductors exist: they have non-zero Resistance and non-zero Inductance.
Therefore, there will be voltage from , as .
Most times, however, this voltage is negligible.