EMI and Cross-Talk Control - A Practical Approach

The Issue!

When a time-varying (AC) current flows in a transmission line, both an electric field and a magnetic field are present. These fields are the source of EMI. In recent years the intensity and effect of these fields has increased in digital circuits due to increased device speeds (faster rise and fall times). A device with a 1.0 ns rise time will likely have a 16 times greater EMI signature than a device having a 4.0 ns rising edge.

The Solution!

An emanating Electro-Magnetic field will travel outward from the source until captured by it's 180 degree compliment. The most effective place to capture and take control of these fields is at the PC board and basic System levels. Gaining an understanding of what generates these fields & currents and how to control and contain them, and their effects, will take EMI and Cross Talk control from "guess work" to basic "everyday practice".

Training to Capture the Problem!This 1 day course is a crisp focus on the issues PC board designers and Engineers need to know to control EMI and Cross Talk and will offer a clear understanding of how to resolve the problem at all levels. The topics include-

• Recommended Reading List.
• Basic Definitions & Issues of EMI / Cross Talk.
• Circuit and PC Board Properties.
• Why EMI and Cross Talk are on the Rise.
• Types of EMI and Cross Talk.
• Correct Power Distribution and Decoupling.
• Source Control of EMI and IC Selection.
• Correct Component Positions on the PCB.
• Correct Position & Size of Planes in the PCB.
• Divided Planes & Plane Islands in the PCB.
• Correct Position of Signal Routes in the PCB.
• Recommended Routing of Conductors.
• Correct Stacking of the PC Board.
• Control of Signal Cross Talk on the PCB.
• Connector Pin Assignments and Placement.
• Board Size/Placement/Bd-Bd Signals.
• Filtering and Blocking Techniques.
• System RF Shielding and Grounding.
• Metal vs Plastic Cabinets/Enclosures.
• Conducted EMI.

All Attendees will receive a full set of overheads and notes on EMI and Cross Talk Control that can be utilized as a future reference when designing printed circuit boards, systems, I/O, filtering and enclosures.