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any one are learning allegro skill code?
and here is a good site for your reference of learning:many example for learning and download.
pcbskill.com is a chinese wiki site for open source's wiki of skill. but is can also has the english UI.maybe can help you. enjoy it!
power signal layer mixed pcb
top
L2GND or L2VCC
L3VCC or L3GND
Bottom
high speed signal can routing in top(when L2GND) or bottom(when L3GND).just reference to GND plan,
For EMI, you need keep 20h rule. the power plan need smaller 20h than the GND.
For Mixed singal, you need use the moat for...
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