Blog | Fresu Electronics

5 Simple Steps to Avoid EMI in your PCB Design.

Dario Fresu

5 Simple Steps to Avoid EMI in your PCB Design.

Here are 5 simple steps to find EMI issues early in your PCB design process: 1. Check the stackup. The stackup is the foundation of...

Dario Fresu

Conducted Emissions

In this article, we’ll dive into the world of conducted emissions, what causes them, how they affect your circuits, and how to fix them.

Dario Fresu

This Is Why You Keep Failing EMI.

Routing over a split in the return reference plane is one of the surest recipes for EMI failure. It took me some time to understand this....

Does electricity work like water in the pipes?

Dario Fresu

Does electricity work like water in the pipes?

Many of us approach printed circuit board design as if we are plumbers. We’re still stuck with the idea that electromagnetism in a PCB...

PCB Design For Low EMI in practice: "Ground is the place where potatoes and carrots thrive"

Dario Fresu

PCB Design For Low EMI in practice: "Ground is the place where potatoes and carrots thrive"

As simple as this phrase is, it’s one of my favorites from one of my favorite EMI engineers, Bruce Archambeault. It also touches on one...

Electromagnetic Fields in a Two-Layer PC Board

Dario Fresu

Electromagnetic Fields in a Two-Layer PC Board

In this article, we are going to explore what happens when, instead of a return reference plane, we have another signal trace in the...

The concept of Electromagnetic Fields in a PCB

Dario Fresu

The concept of Electromagnetic Fields in a PCB

One of the most important concepts in designing printed circuit boards (PCBs) for low electromagnetic interference (EMI) is the concept...

Introduction to Electromagnetic Compatibility (EMC)

Dario Fresu

Introduction to Electromagnetic Compatibility (EMC)

Electromagnetic compatibility, in short also called EMC, is an essential aspect of modern electronics, and it ensures that devices...

Don’t rely too much on your EMI filters!

Dario Fresu

Don’t rely too much on your EMI filters!

Most of us get this wrong when we first hear about EMI. They tell us that filters and shields are the key to solving EMI issues and that...

The Real Job of a PCB Designer: Controlling Electromagnetic Energy

Dario Fresu

The Real Job of a PCB Designer: Controlling Electromagnetic Energy

When I first started with PCB design, I thought a PCB designer’s job was simply to take electrical schematics and replicate them exactly...

EMI: How an invisible force challenges the very essence of PCB design

Dario Fresu

EMI: How an invisible force challenges the very essence of PCB design

In cooperation with Altium Designer, we started a new EMI series: Mastering EMI Control in PCB Design. In this first article, I dive...

PCB Design for Low EMI: Differential Mode vs Common Mode Currents

Dario Fresu

PCB Design for Low EMI: Differential Mode vs Common Mode Currents

I just released my latest video, you can now watch for FREE here: youtu.be/u_2lD-vcN20 Enjoy! Dario If you enjoy it, don't forget to...

PCB Design for Low EMI: How to Minimize Radiated Emissions.

Dario Fresu

PCB Design for Low EMI: How to Minimize Radiated Emissions.

I just released my latest video, over 40 minutes long, where I dive deep into Radiated Emissions. I discuss how they are generated, how...

PCB Design - Power Delivery Network (PDN) for Low EMI

Dario Fresu

PCB Design - Power Delivery Network (PDN) for Low EMI

My latest video on how to design the PDN for low EMI is out, and you can watch it here: https://youtu.be/5yUmlSl6JUI Please leave a like...

All about ESD - Electrostatic Discharge. New YouTube Video is Out!

Dario Fresu

All about ESD - Electrostatic Discharge. New YouTube Video is Out!

My new video lesson is out! This time, it's all about ESD and how to deal with it when designing Printed Circuit Boards. Go watch the...

Dario Fresu

Maximising the Value of the Schematics

One of the misconceptions I had about designing a schematic when I started in this field was that the schematic is only a representation...

Common-mode currents... What a nightmare!

Dario Fresu

Common-mode currents... What a nightmare!

Indeed, they can be! Especially if your goal is to certify your electronic product, and EMC keeps failing test after test. I think this...

Dario Fresu

Want to Pass EMC tests? Avoid this...

What classical circuit theory fails to teach you about designing Printed Circuit Boards (PCBs) is that it’s not about electrons moving...

Dario Fresu

90-Degree Bends in a PCB Trace

Not exactly what you might think. All PCB and Hardware Engineers have heard it at least once: 'Never use 90-degree bends when routing...

Dario Fresu

Creepage and Clearance

In this and the next article, we're digging into the basics of high-voltage PCB design, with a focus on two crucial concepts: Clearance...