Henry Ott Consultants

• 1. Measuring Common-Mode Currents on Cables
• 2. Slots in Ground Planes
• 3. Transmission Line Rules of  Thumb
• 4. Grounding of Mixed Signal PCBs 
• 5. The Ten Best Ways to Maximize the Emission from Your Product
• 6. EMC Reference Data (pdf file) Lists some useful EMC formulas and approximations. (Updated on 9/8/09)
• 7. Frequency - Wavelength Chart
• 8. PCB Design Guidelines (pdf file)
  
• 9. Decoupling (Bypass Capacitors)
  
• 10. PCB Stackup 
• Part 1. Introduction
• Part 2. Four-Layer Boards
• Part 3. Six-Layer Boards
• Part 4. Eight-Layer Boards
  
• Part 5. Ten-Layer Boards
• Part 6. Return Path Discontinuities
• 11. Dipole Impedance
• 12. The Decibel
• 13. Dipoles For Dummies
• Part 1. Basic (pdf file)
• Part 2. Intermediate (pdf file)
• Part 3. Advanced (pdf file)
• 14. Red Flags 
• 15. Balanced vs. Unbalanced Audio System Interconnections (pdf file)
• 16. Antenna Theory Crossword Puzzle (pdf file)
  
• Solution
• 17. How Do Digital Logic Currents Flow? Slide Show
• 18. Distinguishing Between C-M & D-M Conducted Emission
  
• 19. Workbench EMC Measurements (pdf file)