Grounding and Signal Ground in EMI Design

Guide to grounding in electromagnetic interference design with emphasis on protective ground and signal ground, plus layout, filtering, shielding and testing for HF systems

Common EMI Sources and Propagation Paths

Overview of electromagnetic interference (EMI) causes, propagation paths and engineering mitigation—shielding, filters, grounding and EMC testing for device design.

EMI Filter Selection and Shielding Best Practices

Guidelines for selecting and applying EMI filters and shielding materials, covering frequency range, filter types, PCB layout, testing, and grounding best practices.

EMI Effects on Electronic Systems and Mitigations

Electromagnetic interference (EMI) overview: impacts and mitigation techniques including shielding, PCB layout optimization, interference-resistant circuits and EMI testing.

Designing EMI-Resistant Circuits and PCB Layouts

Practical EMI design and testing guidance for EMI-resistant circuits and PCB layouts: grounding, filters, layout, shielding, and certification steps.

EMC Conducted Emission Failure Analysis and Fix

Troubleshooting DC power port conducted emissions: on-site GNDD to -48VRTN bonding and DC-C grounding reduced 150 kHz–2 MHz noise, achieving >5 dBμV margins.

Differences Between Shielded Rooms and Anechoic Chambers

Technical overview of platform screen door types, power and lighting design for electromagnetic shielded rooms, and differences between shielded rooms and anechoic chambers.

Electromagnetic vs Ionizing Radiation and Mitigation

Definitions of electromagnetic and ionizing radiation with practical mitigation measures to reduce exposure—distance, shielding, device use, and low-emission choices.

Resonance: The Core of EMI Problems

Overview of resonance principles, LC circuit behavior, and how resonance causes EMC/EMI problems in filters and PCB layouts, plus mitigation strategies.

How Electromagnetic Interference Is Generated and Its Paths

Technical overview of electromagnetic interference (EMI), common sources: power lines, RF, radiated emissions, crosstalk and ground effects, plus mitigation via shielding and filtering.

EMI, EMS, and EMC: Key Differences

Summary of EMI and EMC: definitions, principles, radiated vs conducted interference, immunity strategies, shielding, filtering, and EMC testing.

EMC ESD Models Explained

Technical overview of ESD models and measurement methods, focusing on HBM parameter measurement, capacitance estimation and robustness testing for electronic devices.

10m, 5m and 3m Semi-Anechoic Chamber Specs

Technical specifications for 3 m, 5 m and 10 m semi-anechoic chambers: shielding structure, absorbers, NSA, sVSWR, quiet zone dimensions and radiated immunity/emission compliance

Common ESD Protection Devices and Principles

Overview of ESD protection devices (diode, MOS/BJT, resistor, SCR), their avalanche/snapback mechanisms, trigger/hold voltages, and comparative per-area robustness.

LDMOS Design Considerations for ESD Protection

Technical overview of LDMOS application in high-voltage ESD protection, covering GGNLDMOS design, RESURF, field plates, super junction and layout/structure trade-offs

EMI Mitigation for Buck Converter Topology

Analysis of electromagnetic interference in switching power supplies and practical mitigation: shorten switching loop, lower di/dt, ferrite beads, RC snubbers, common-mode choke.

Transformer Inter-Winding Shield Impact on SMPS EMI

How a shielded transformer suppresses EMI: an inter-winding shield tied to primary ground blocks distributed-capacitance coupling, reducing conducted and radiated emissions.

EMC Fixes for Massage Chair Display Upgrade

EMC case study: reducing clock-related emissions after adding a display using a spread-spectrum IC, capacitive and RC filtering, and improved grounding of the ribbon cable.

What Is EMI? Power Supply EMI Solutions

Summarizes EMI sources in switching power supplies and mitigation—layout, loop reduction, package techniques—and how low-noise μModule regulators simplify PCB design.

Legendre Filter Synthesis and Design Details

Derivation of Legendre filter synthesis from monotone minimum-attenuation constraints, with MATLAB design tool, coefficient generation and LP/BP examples.