top of page


Radiated Emissions by the heatsinks of microprocessors.
My current client has four heatsinks in his design, so in my solution, I'm designing some precautions to minimize emissions in the final...

Francesco Poderico
Jan 1, 20233 min read
Â
Â
Â
Criteria A, Criteria B and the Criteria C.
Back in the day, when testing was conducted for EMC, it was possible to perform tests, such as immunity tests, during which the device...

Francesco Poderico
Dec 31, 20222 min read
Â
Â
Â


CAN BUS protection.
The CAN interface is the most common BUS inside a car. Some years back, I was introduced to the CAN bus by a good friend of mine from...

Francesco Poderico
Dec 7, 20223 min read
Â
Â
Â


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...

Francesco Poderico
Dec 4, 20224 min read
Â
Â
Â


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 30, 20222 min read
Â
Â
Â


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...

Francesco Poderico
Nov 27, 20222 min read
Â
Â
Â


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...

Francesco Poderico
Nov 23, 20222 min read
Â
Â
Â


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 20, 20223 min read
Â
Â
Â


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...

Francesco Poderico
Nov 16, 20222 min read
Â
Â
Â


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...

Francesco Poderico
Nov 14, 20223 min read
Â
Â
Â


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...

Francesco Poderico
Nov 12, 20223 min read
Â
Â
Â


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, 20223 min read
Â
Â
Â


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...

Francesco Poderico
Nov 11, 20222 min read
Â
Â
Â


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....

Francesco Poderico
Nov 11, 20222 min read
Â
Â
Â


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....

Francesco Poderico
Nov 11, 20223 min read
Â
Â
Â


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...

Francesco Poderico
Nov 11, 20221 min read
Â
Â
Â


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...

Francesco Poderico
Nov 11, 20223 min read
Â
Â
Â


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...

Francesco Poderico
Nov 7, 20223 min read
Â
Â
Â


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
Nov 3, 20222 min read
Â
Â
Â


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...

Francesco Poderico
Oct 26, 20222 min read
Â
Â
Â
bottom of page