Ductapemaster
Newbie level 1
I'm currently working on my senior project for my EE degree and I am designing a PCB that requires a bipolar power supply. Currently my PCB design (version 1, with a single ended power supply) has 4 layers, the middle being power and ground. The power planes are split into analog and digital planes as well, as noise is of concern. I'm wondering if there are any special considerations to take into account, as far as the layout goes, when adding a negative rail to my board. I'm not exactly sure what the best way to route the power rails would be, as the two internal layers are already dedicated to other rails. Does this kind of design require more than 4 layers typically?
