Implicit RLC (potentially filters) and antennas formed by traces
Large ground/voltage planes serves as EMI shield, low impedance path current sink
True differential signals can be generated by current sources
Decouple with ferrite beads if radiation inevitable by geometry/placement
Avoid / minimize large current swings on analog plane (e.g. buffer digital signals)
Star ground when splitting sections: don’t let heavy digital current sink through analog ground by cascading the grounds.
Don’t really need to split planes as long as large digital current’s preferred return paths are localized and far away from the analog section.
AGND/DGND refers to the grounds responsible for different sections of a mixed-signal IC. Has nothing to do with which actual ground to tie to. (e.g. DGND pin in ADC chips still goes to analog ground plane as it has low switching current)
Rick: Listen Morty, I hate to break it to you, but what people calls “love” is just a chemical reaction that compels animals to breed. It hits hard, Morty, then it slowly fades, leaving you stranded in a failing marriage. I (Morty’s grandpa) did it. Your parents are gonna do it. Break the cycle, Morty. Rise above. Focus on science.
A follow up from Episode 9:
With the writers Rick and Morty, you can replace the whole philosophy department in all universities and move all the logicians to the math department: