Showing posts with label EMC Compliance. Show all posts
Showing posts with label EMC Compliance. Show all posts

Thursday, April 23, 2026

EMC by Design - Systematic Approach (Emission Control - Line Termination)

     





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EMC by Design - Systematic Approach (Emission Control - Components & Circuits)

 

Frequency Sprectra for Various waveform
Harmonic envelop of trapezoid

Comparison of harmonic Spectra of logic families
Recommeded design practice at component level



Recommended design practices at component level continue

Recommended design practices at circuit level

Allowable loop area for various logic family
Allowable track length for vairous logic family



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EMC by Design - Systematic Approach (PCB Layer Stack up)

 

PCB Layer stack up Guide for Multi-Layer PCB
PCB Layer stack up for 4 layer stack up with illustration
Low cost 4 layer stack-up with embedded capacitance and Intel's recommendation




Symmetrial six-layer PCB stack-up
Equally spaced 6 Layer PCB stack-up
Symmetrical Eight-layer PCB Stack-up
Symmetrical Eight-layer PCB stack-up




Design Rule for Ground Layout

Recommended practive for Layout & Grounding


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EMC by Design - Systematic Approach (Grounding - Signal Reference Ground, 0V)

 

Diagram illustrating single point grounding for analog, digital, and high power loads, showing current paths to power supply in two different grounding configurations.
Diagram showing a modified single-point grounding system with analog, digital, and analogue inputs connected to low-power and high-power outputs.

ALT Text: Diagram illustrating the grounding signal reference ground (0V) with four types of signals—Analog, Digital, High Power Loads, and Power Supply—each connected to a common grounding point through separate current paths labeled I1, I2, I3, and I4. The diagram emphasizes the limitation of single-point grounding systems.
The diagram depicts the impedance of a grounding system with long ground wires, including equipment connections, an equivalent circuit featuring inductance and capacitance, and a graph showing impedance variations with frequency highlighting parallel and series resonances.
Diagram showing impedance and resonance in grounding system circuits and printed circuit tracks.





Diagram of a grounding system showing signal reference ground (0V) with connections for analog, digital, high power loads, and power supply, all connected to a ground grid with current paths labeled I1 to I4.













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EMC by Design - Systematic Approach (Circuit Layout - Chassis Bonding)

   

EMC by Design - Systematic Approach (Circuit Layout - Chassis Bonding)
EMC by Design - Systematic Approach (Circuit Layout - Chassis Bonding)

Chassis bonding reduces Transfer Impedance
Closer PCB - Chassis spacing results in lower emission

Circuit layout - Chassis Bonding Rule

PCB - Chassis Bond - Side and Plane View

PCB - Chassis Bond Layout Options

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Designing Products for EMC Compliance

  

This UL University presentation by Ganesan R. covers "Designing products for EMC compliance," emphasising the "EMC BY DESIGN" approach for safety.

 





















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Power Calculation from Current and Resistance

Power Equation for Current and Resistance P = I² R Current (I) in Amps ...