Design practical EMI filters using LC, π, T, and multi-stage topologies, with real examples and simulations.

What you'll learn
- Understand what EMI is and what to do about it
- Differentiate and separate Common Mode and Differentail Mode noise
- Pick right filter toplogy based on application
- Learn filter damping techniques
- Design small and effecient filters with a focus on stability (Middlebrook's Theorem)

Requirements
- If you can handle Ohm's law, reactance, and the idea of frequency response, you're ready.I'll take you the rest of the way — from "I've heard of EMI" to "I know how to design the filter for this converter."

Description
EMI isn't about more parts — it's the right parts, placed right, proven right.

I'mSam Tabaja, M.S. in Electrical and Computer Engineering, with 10+ years in the automotive and energy industries. I learned EMI the hard way: long nights, failed chamber tests, and "mystery" noise that didn't care about my beautiful schematics.

Like you, I tried to learn EMI and filter design fromYouTube videos, app notes, and random PDFs— each one gave me apieceof the puzzle, but never the full picture.This course is where I put those pieces together for you.

What this course is (and isn't)

This course is forsomeone who already has a working converter(and its control loop) and now needs todesign EMI filters around itso it behaves in the real world and passes EMC.

Wedo notredesign the converter control loop or compensate it from scratch. Weassume the converter and control are fixed, and we focus on what you can do withinput and output filtersto tame EMI.

It's designed as abeginner-to-advanced path:

You can start with only basic circuit knowledge

You finish being able todesign and reason about real EMI filtersfor real hardware

What you'll learn

By the end of the course, you'll be able to:

Understandwhat EMI actually is, where it comes from in converters, and why you need to worry about it, or not ;)

Separatecommon-modevsdifferential-modenoise and trace how each one flows through your system.

Understand theglobal EMC standardsthat are likely to apply to your application and what they're really asking you to limit.

Choose betweenLC, π (Pi), T, and 2-stage LC topologiesand know when each makes sense for aninput filter.

Design AC/DC line filters(both input and output) based on target attenuation and corner frequencies.

Useimpedance vs frequency curvesof capacitors to designoutput C filtersthat hit the noise where it lives (picking caps at their impedance minima to target specific noise bands).

Simulate and check your filters inSIMetrix, including impedance and frequency response.

Recognize when a filter mightinteract badly with the converter(CPL behavior, stability concerns) so you don't fix EMI and break everything else.

Applyplacement, grounding, and routing best practicesso your filter works in hardware, not just in SPICE.

Walk away with downloadable appendicies that cover design equations for different filter topologies.

Walk away with an editable excel sheet that helps you decide on a single vs two-stage LC filter.

Walk away with aprintable, handbook-style moduleyou can keep next to your bench for quick reference on placement and routing tips.

Practical design examples inside

This isn't just slides and theory — we walk through two full, practical design workflows:

Input Filter Design Example

Start from a noisy, already-built converter

Design anLC input filter, then upgrade it to a2-stage LC filter,andthen aπ filter

See how each change moves the corner frequencies and improves attenuation

Understand the effect of source/load impedance and when extra stages stop helping

Output Filter / Capacitor Selection Example

Design anoutput C filterfor a converter with known noise issues

Usecapacitor impedance vs frequency curvesto select parts whoselowest impedance lines up with the noise peaks

See how mixing different capacitor types/values shapes the overall impedance and the noise performance

These examples are built to mirror what you'll face in the lab:you have a converter, you see noise at certain frequencies, and you need afilter that works, not a perfect academic example.

How we'll learn

Over about4.5 hours of focused content, we'll use:

Crisp slides and clear diagramsto build intuition

Step-by-step derivationsonly where they actually help design decisions

SIMetrix simulationsto visualize impedance, resonances, and filter behavior

Checklists and placement tipsfor turning designs into quieter boards and better chances of first-pass compliance

Who this course is for:
- An electrical / power electronics engineer working on converters, inverters, automotive, or energy systems
- A hardware engineer or integrator who suddenly "owns EMI" for a project
- A student, hobbyist, or junior engineer who understands basic circuits and wants to jump to industry-style thinking
- Someone who's tired of collecting random EMI tips from YouTube and wants a structured, end-to-end path from basics to practical filter design
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