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- Bernard_D._H._Tellegen abstract "Bernard D.H. Tellegen (Winschoten, 24 June 1900 – Eindhoven, 30 August 1990) was a Dutch electrical engineer and inventor of the pentode 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 Natuurkundig Laboratorium (Philips Physics Laboratory) in Eindhoven. In 1926 he invented the pentode vacuum tube. The gyrator was invented by him around 1948. 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.".
- Bernard_D._H._Tellegen almaMater Delft_University_of_Technology.
- Bernard_D._H._Tellegen award IEEE_Edison_Medal.
- Bernard_D._H._Tellegen birthDate "1900-06-24".
- Bernard_D._H._Tellegen birthYear "1900".
- Bernard_D._H._Tellegen deathDate "1990-08-30".
- Bernard_D._H._Tellegen deathYear "1990".
- Bernard_D._H._Tellegen nationality Netherlands.
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- Bernard_D._H._Tellegen almaMater Delft_University_of_Technology.
- Bernard_D._H._Tellegen awards IEEE_Edison_Medal.
- Bernard_D._H._Tellegen birthDate "1900-06-24".
- Bernard_D._H._Tellegen dateOfBirth "1900-06-24".
- Bernard_D._H._Tellegen dateOfDeath "1990-08-30".
- Bernard_D._H._Tellegen deathDate "1990-08-30".
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- Bernard_D._H._Tellegen name "Bernard D.H. Tellegen".
- Bernard_D._H._Tellegen name "Tellegen, Bernard".
- Bernard_D._H._Tellegen nationality Netherlands.
- Bernard_D._H._Tellegen shortDescription "Dutch scientist".
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- Bernard_D._H._Tellegen workplaces "• Delft University".
- Bernard_D._H._Tellegen workplaces "• Philips Natuurkundig Laboratorium".
- Bernard_D._H._Tellegen description "Dutch scientist".
- Bernard_D._H._Tellegen description "Dutch scientist".
- Bernard_D._H._Tellegen subject Category:1900_births.
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- Bernard_D._H._Tellegen subject Category:Dutch_electrical_engineers.
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- Bernard_D._H._Tellegen comment "Bernard D.H. Tellegen (Winschoten, 24 June 1900 – Eindhoven, 30 August 1990) was a Dutch electrical engineer and inventor of the pentode 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 Natuurkundig Laboratorium (Philips Physics Laboratory) in Eindhoven. In 1926 he invented the pentode vacuum tube. The gyrator was invented by him around 1948.".
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- Bernard_D._H._Tellegen name "Bernard D.H. Tellegen".
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