Appendix A. 100+ General Design Guidelines to Minimize Signal-Integrity Problems
Never follow a rule blindly. Always understand its purpose and put in the numbers to evaluate the costs and benefits for your specific design.
0. Always use the longest rise time you can.
A.1 Minimize Signal-Quality Problems on One Net
Strategy: Keep the instantaneous impedance the signal sees constant throughout its entire path.
Tactics:
1. Use controlled-impedance traces.
2. Ideally, all signals should use the low-voltage planes as their return planes.
3. If different voltage planes are used as signal returns, there should be tight coupling between them. Use the thinnest dielectric you can afford and use multiple low-inductance decoupling capacitors between the ...
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