Blog | Neutronix Ltd

Cable length strategy during radiated emissions.

Dec 4, 20224 min read

Cable length strategy during radiated emissions.

Radiated emissions from a product don't always turn out the way we want. And having a plan for troubleshooting emissions when they exceed...

Common mode coupling mechanism on AC/DC converter.

Francesco Poderico

Nov 30, 20222 min read

Common mode coupling mechanism on AC/DC converter.

In a previous article, I discussed the common mode coupling on the PoE (Power Over Ethernet) DCDC converter that I discussed a few months...

Francesco Poderico

Nov 27, 20222 min read

EMC issues due to optoisolators.

EMC is considered by many to be a "black magic" for a number of reasons. In some cases, it may be the case that you obtain unexpected...

Common mode emission on card extensions and ground bouncing.

Francesco Poderico

Nov 23, 20222 min read

Common mode emission on card extensions and ground bouncing.

Today, it is common for a product to contain a motherboard and several daughter boards. In the following example, let us imagine that we...

Precautions I take when using metallic enclosures

Francesco Poderico

Nov 20, 20223 min read

Precautions I take when using metallic enclosures

A couple of months ago, I was testing EMC for a medical product. As the product is enclosed within a metallic enclosure, I was concerned...

Francesco Poderico

Nov 16, 20222 min read

The insulation transformer Nightmare.

I visited Scotland on holiday, a beautiful country! There is so much history in Edinburgh, and I also enjoyed visiting Glasgow. It is...

Mixed designs with ADC and DAC require some precautions.

Francesco Poderico

Nov 14, 20223 min read

Mixed designs with ADC and DAC require some precautions.

A few years ago, I worked on digital radio for a customer. It was a very complex design, but the reward for an electronic engineer such...

How I control even and odd harmonics on a clock trace.

Francesco Poderico

Nov 12, 20223 min read

How I control even and odd harmonics on a clock trace.

Some time ago, I wrote a blog post about the design technique I use when I am solving EMC emissions for clients when I am working on...

Diodes and operational amplifier from an EMC perspective.

Francesco Poderico

Nov 11, 20223 min read

Diodes and operational amplifier from an EMC perspective.

Those of you who are reading my post know that there is not much 'black magic' behind EMC and that there is always an explanation for why...

Francesco Poderico

Nov 11, 20222 min read

Routing strategy when changing layer.

I designed my first general I/O PCI card when I was a student (a few years ago now :-)). The PCI card was part of my thesis, and the...

Some analysis I do when I design a DCDC converter. (Part 4)

Francesco Poderico

Nov 11, 20222 min read

Some analysis I do when I design a DCDC converter. (Part 4)

As we have seen in parts 1, 2, and 3, the input current loop of a DCDC converter affects both conductive and radiated emissions....

Some analysis I do when I design a DCDC converter. (Part 3)

Francesco Poderico

Nov 11, 20223 min read

Some analysis I do when I design a DCDC converter. (Part 3)

In the process of creating a new product from scratch, I always add components that I may not need in production when I am designing it....

PCB Crosstalk and how to use the ground plane to minimise it.

Francesco Poderico

Nov 11, 20221 min read

PCB Crosstalk and how to use the ground plane to minimise it.

To avoid EMI and crosstalk on both PCB traces and connectors, it is crucial to understand the return path current. Previously, I...

Some analysis I do when I design a DCDC converter. (Part 2)

Francesco Poderico

Nov 11, 20223 min read

Some analysis I do when I design a DCDC converter. (Part 2)

I had the pleasure of working with a customer a few years ago, who was ready to launch his product on the market. My suggestion was to go...

The importance of designing the return current properly and why it is so critical!

Francesco Poderico

Nov 7, 20223 min read

The importance of designing the return current properly and why it is so critical!

It was my pleasure to assist a startup company in passing EMC last month. The company now has its CE mark on their product and I am...

The analysis I do when designing a DCDC converter. (Part 1)

Francesco Poderico

Nov 3, 20222 min read

The analysis I do when designing a DCDC converter. (Part 1)

When we design electronics, there are a few things we shouldn't skip. Often, CEOs and CTOs pressure us to design things quickly. But what...

Francesco Poderico

Oct 26, 20222 min read

Placement of vias on bypass capacitors.

When we place our bypass capacitors on a PCB, there are several factors that may affect the series inductance of the capacitor ESL when...

Problems associated with input ceramic capacitors.

Francesco Poderico

Oct 23, 20222 min read

Problems associated with input ceramic capacitors.

I spent several stimulating days last week performing EMC testing on one of my most challenging designs in the past two years. This is...

Francesco Poderico

Oct 22, 20222 min read

Why do we need the ground/power planes!

Recently, a customer contacted me about the possibility of "fixing" their design from the standpoint of EMC. The board may function...

Francesco Poderico

Oct 21, 20222 min read

The Galvanic corrosion on PCB

Have you ever seen corrosion on the solder joints on an old PCB? Or on the aluminium side of a power supply? Why we do have corrosion,...

EMC Consutancy & Design solutions

Subscribe Form