emc concepts explained Archives - Page 6 of 8

RC Snubber Design for SMPS Protection

Part I: Fundamentals of Inductive Switching and RC Snubber Impact This is the first of the two articles devoted to the topic of an RC snubber design. In Part I we discuss the fundamentals of the inductive swit... Read More...

Impedance of the Four Passive Circuit Components: R, L, C, and a PCB Trace

This article investigates the impedance of the three standard passive circuit components (R, L, and C) as well as the frequency response of a PCB trace.

Transmission Line Reflections at a Reactive Load

This article discusses the reflections on a transmission line at the capacitive and inductive loads.

Circuit Theory Model of Ringing on a Transmission Line

This article uses a classical circuit-theory model of a series RLC circuit to explain the phenomenon of ringing on a transmission line, or a PCB trace.

Transmission Line Reflections: Bounce Diagram

This article explains the creation of a bounce diagram for a transmission line circuit (see [1] for transmission line reflections).

S-Parameters Tutorial – Part I: Fundamental Background

This s-parameters tutorial consists of two parts: Part I discusses the fundamental background needed to understand the concept of s-parameters; Part II explains the s-parameters use in EMC measurements and testing

EMI Reduction by Spread-Spectrum Frequency Dithering

This article examines the spread-spectrum frequency dithering technique to reduce the EMI noise from a SMPS.

Bulk Current Injection (BCI) – Substitution Method and Closed-Loop Method with Power Limitation

In this month’s EMC Concepts Explained, we explore the conducted immunity test known as a Bulk Current Injection (BCI) test, according to ISO 11452-4 specification . This immunity test is carried out by inducin... Read More...

SMPS Input Filter Design: Negative Resistance Approach

This article discusses a practical approach to designing an input filter to the switch-mode power supply (SMPS).

Near-Field Shield Effectiveness Evaluation Using H-Field Probe

We compare the shielding effectiveness of various solid metallic shields by direct H-field measurements in the near field of the source.

Tagged emc concepts explained