David Berning

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David W. Berning was born in Cincinnati, OH, in 1951. He received the B.S. degree in physics from the University of Maryland, College Park, in 1973. In 1974, he joined the National Bureau of Standards (now the National Institute of Standards and Technology, NIST), in Gaithersburg, Maryland. Much of his career has focused on semiconductor device reliability, first using laser-scanning techniques to probe active devices, and later using electrical methods to explore safe operating area for power devices. He is currently involved in developing techniques for characterizing high-voltage high-speed SiC power diodes and MOSFETs. He is the author of several publications in the IEEE TRANSACTIONS and Conference PROCEEDINGS.

Mr. Berning is also the holder of three U.S. patents in the area of high-end vacuum tube audio amplifier design. He established the David Berning Company in 1974, which manufactures a series of vacuum tube audio amplifiers based on a unique impedance converter that replaces the traditional audio-output transformer. The impedance converter operates at a fixed radio frequency and eliminates the frequency-dependent performance inherent in all transformer coupled tube amps. These amplifiers can exceed the performance of OTL amplifiers because they do not use output transformers but properly match the tube impedance to that of the speaker.

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