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Bill Spence

Bill Spence is a Senior Electromagnetic-Compliance Engineer and has been working in Gentex Corporation’s Electro-Magnetic-Engineering Lab for the last fifteen years. Previously, Bill was a Senior Microphone Design Engineer at Electro-Voice, Inc., where he worked for twenty-four years. Bill’s name has been listed in a dozen U.S. Patents for automotive microphones, digital communications, and switch-mode-power-supply designs. He frequently presents seminars on EMC/ESD topics and microphone design.

From This Author

Columns

RC Snubber Design for SMPS Protection

This part II of the RC Snubber topic discusses the systematic and efficient design process and design verification through simulations and laboratory measurements
Columns

RC Snubber Design for SMPS Protection

This is the first of two articles devoted to RC snubber design. In Part I, we discuss the fundamentals of inductive switching and the need for circuit protection.
Columns

EMI Reduction by Spread-Spectrum Frequency Dithering

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

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).
Columns

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.
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