Do you design your own printed circuit boards? Even 4 layer boards can be done by hobbyists today relatively cheap. For simple analog circuits, it is not very difficult to design a circuit that works well. But what about mixed analog/digital circuits? Or analog boards with lots of small components? Do you need 4 layers or is a two-layer-board enough? How should you route power supply lines? What about a ground plane? There are lots of things to think about. Here are some links to documents that can help you to create better PCBs:
- TI: PCB design guidelines for reduced EMI
- Tim Jarvis: Best practices in PCB design
- Linear: PCB Layout Considerations for Non-Isolated Switching
Power Supplies while it focusses on switching power supplies, some concepts are also useful for mixed analog/digital circuits - TI: Circuit Board Layout Techniques
- AD: Printed circuit board design issues