Bernard D. H. Tellegen
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| Bernard D.H. Tellegen | |
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| Notable awards | IEEE Edison Medal |
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Bernard D.H. Tellegen (Winschoten, 24 June 1900 - Eindhoven, 30 August 1990) was a Dutch electrical engineer and inventor of the penthode and the gyrator. He is also known for a theorem in circuit theory, Tellegen's theorem.
He obtained a masters degree in electrical engineering from Delft University in 1923, and joined the Philips Research Laboratories in Eindhoven. In 1926 he invented the penthode. (Note: This invention is a great break-through in the age of vacuum tubes. It is a big improvement over triodes and tetrodes.) The gyrator was invented by him around 1948. (Note: The gyrator is useful to simulate the effect of an inductor without using a coil. For example, it is used in Hi-Fi graphic equalizers.) He held 41 US patents.
In the period 1946-1966 Tellegen was an adjunct professor of circuit theory at the University of Delft. From 1942 to 1952 he was president and honorary member of the Netherlands Electronics and Radio Society.
The Australian Institute of Radio Engineers appointed Tellegen an honorary life member in 1953. He was Fellow of the IEEE, and he won the IEEE Edison Medal in 1973 "For a creative career of significant achievement in electrical circuit theory, including the gyrator". Tellegen was elected a member of the Royal Netherlands Academy of Sciences in 1960. In 1970 the University of Delft conferred on an doctor honoris causa degree.
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