Board Design Signal Integrity
“ALL EMI PROBLEMS BEGIN AND END IN THE PRINTED CIRCUIT BOARD (PCB)”
Printed circuit boards (PCBs), serve as the core, the nucleus, of any electronic system. They contain the processing circuits, the communication devices, the memory arrays and the input/output circuitry.
Contemporary components employ advanced technologies to achieve high speed propagation. In recent years, printed circuit boards have become increasingly complex. The use of high density VLSI (very large scale integrated circuits) on the one hand, combined with the increased processing speed and data rates, have led to the increased density of the circuits, requiring the placement of more components (and conductors) in much less “real estate” on the PCB.
New technology particularly entails the use of high speed digital circuits, responding to the need for increased processing rates of data.
The use of high speed-high edge rate digital circuits, acting like RF signals, along with the need for low power consumption, contributed to higher electromagnetic emissions from the circuits, on the one hand, and increased vulnerability of the circuits – on the other, leading to EMI PROBLEMS. A special problem also associated with the functional performance of high speed digital circuits themselves is that of “SIGNAL INTEGRITY”.
Most Hardware Engineers, however, have been seeking for 20 years old "rules of thumb".
- Are the "rules of thumb" valid in your application?
- Do you know on which assumptions are they based?
- Do you know their origins?
- Do you understand them?
- Do they comply with your system requirements?
The proper design of printed circuit boards (PCBs) is a cost effective approach for the control of EMI in high speed circuits and is a necessity for ensuring the proper performance of the system.
The High Speed Board Design Course explores the High Speed Media and Technologies, based on scientific facts, design examples and case studies.
This course is essential for Hardware Design Engineers who seek to tell apart the superstitious beliefs from physical facts.