[問題] PCB的layer數
目前的設計是雙面板
但所有layout都在上層
下層完全鋪銅
----- signal
----- ground
想請問這樣的設計
在noise上和四層板哪個SNR較好
----- signal
----- power
----- power
----- ground
or
----- signal
----- power
----- ground
----- signal
板上只有少數數位元件
大多為類比元件
noise指的是類比訊號
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