Here is a deep dive into achieving EMC for printed circuit boards (PCBs). 1. Understanding the Pillars of EMC EMC is divided into two main categories:
Design for compatibility. The spectrum is a shared resource.
A well-designed layer stackup is the cheapest and most effective EMC filter money can buy. The most critical design decision is the placement of the ground and power planes relative to the signal layers.
Placing a signal layer directly adjacent to a solid reference plane (Ground or VCC) reduces the loop area, which significantly lowers radiation.
A continuous, unbroken ground plane is the single most effective tool for EMC. It provides a low-impedance return path for signals.
Filter all I/O lines at the connector with common-mode chokes or ferrite beads. Connect cable shields directly to chassis ground, not the digital ground plane.
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Here is a deep dive into achieving EMC for printed circuit boards (PCBs). 1. Understanding the Pillars of EMC EMC is divided into two main categories:
Design for compatibility. The spectrum is a shared resource.
A well-designed layer stackup is the cheapest and most effective EMC filter money can buy. The most critical design decision is the placement of the ground and power planes relative to the signal layers.
Placing a signal layer directly adjacent to a solid reference plane (Ground or VCC) reduces the loop area, which significantly lowers radiation.
A continuous, unbroken ground plane is the single most effective tool for EMC. It provides a low-impedance return path for signals.
Filter all I/O lines at the connector with common-mode chokes or ferrite beads. Connect cable shields directly to chassis ground, not the digital ground plane.