John Ambrose Fleming

John Ambrose Fleming (Lancaster, November 29, 1848 - Sidmouth, April 18, 1945) was a British physicist and electrical engineer, considered one of the forerunners of electronics.

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Fleming studied at University College School and later at University College London. Later he himself was a professor at important institutions, including the University of Cambridge.

On November 16, 1904, he registered a patent for his invention, the thermoionic diode or valve using the Edison effect that he had discovered in 1883. Later in 1905, a year later, he patented the "Fleming Valve" 3. 4; which served as a rectifying diode, preceding the triode and other structures. This invention is considered the beginning of electronics.

He was awarded the Hughes Medal in 1910, awarded by the Royal Society "for his research in electricity and electrical measurements".

In recognition, the Royal Society of Arts in London awarded Fleming the Gold Albert Medal in 1921 and in 1929 he received the title of sir.