Once the cause of the noise is determined, the next step is to take EMI suppression measures.
At this time, you will first consider avoiding a PCB wiring design change if possible. This is because it takes time to redesign Continue reading →

EMI suppression is time consuming and inefficient if you try things you can randomly think of.

So, there is an idea to find out a cause of the problem through simulation and get a clue how to deal with it. Continue reading →

In order to solve an EMI problem, you first examine the current noise emission in detail in an anechoic chamber, and then check an effectiveness of an implemented measure again and again until the result meet necessary requirements.
If the Continue reading →

Because EMI suppression measures have to be taken in a limited time, it is difficult to think carefully and grapple with them systematically.

In such a situation, you might try to do what comes to your mind at random and Continue reading →

Once the noise source is identified, the first thing to consider is whether the noise source itself can be suppressed, but if it is difficult to do so, you need to consider a second option: prevent the propagation of the Continue reading →

Knowing where the concerned noise is coming from, or in other words, what the source of the noise is, is the first step in taking action. The helpful way to locate the noise source is to figure out the frequency Continue reading →

Noise emission is caused from three factors:

1. Noise source
2. Conduction path
3. Radiating element

If you take measures against any of these three, you can stop the emission.

1 includes a clock of the CPU and the switching operation of the Continue reading →

Have you ever wondered why circuit noise occurs even though it was designed properly?

You thought “I was calculated by the circuit design simulator and confirmed the required specifications were satisfied”, “Frequency components of potential noise sources have also been Continue reading →

EMC problems are often found after a prototype has been made during product development process. Even if the development schedule is on track until the prototype is prepared, once the EMC problem occurs, it will take a lot of time Continue reading →