3.1. Why Control Impedance?3.2. Influence of Rise Time on Signal Degradation3.3. Model of a Controlled Impedance Interconnect3.4. Interconnects on PCBs3.5. Impedance Control for a Microstrip Configuration3.6. Analysis of Propagation in Interconnects3.7. Effect on Data Bus Configuration3.8. Application to Clock Distribution3.9. Conclusion