Edwin Howard Armstrong

Edwin Howard Armstrong

Electrical Engineer and Inventor
Born Dec 18, 1890

Edwin Howard Armstrong was an American electrical engineer and inventor. He has been called "the most prolific and influential inventor in radio history". He invented the regenerative circuit while he was an undergraduate and patented it in 1914, followed by the super-regenerative circuit in 1922, and the superheterodyne receiver in 1918. Armstrong was also the inventor of modern frequency modulation (FM) radio transmission.… Read More

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Learn about the memorable moments in the evolution of Edwin Howard Armstrong.


1890 Birth Born on December 18, 1890.


1902 11 Years Old In order to improve his health the Armstrong family moved in 1902 from the Upper West Side into a house at 1032 Warburton Avenue in Yonkers, which overlooked the Hudson river. … Read More


1919 28 Years Old He returned to the United States in the fall of 1919. … Read More


1922 31 Years Old Armstrong married Sarnoff's secretary, Marion McInnis, in December 1922. … Read More
1923 32 Years Old …  Armstrong and MacInnes were married in 1923. … Read More


1936 45 Years Old …  Armstrong managed to demonstrate the advantages of FM radio despite Carson's skepticism in a now-famous paper on FM in the Proceedings of the IRE in 1936, which was reprinted in the August 1984 issue of Proceedings of the IEEE. … Read More
1937 46 Years Old 1 More Event
The threshold concept was discussed by Murray G. Crosby (inventor of Crosby system for FM Stereo) who pointed out that for wide band FM to provide better signal to noise ratio, the signal should be above a certain threshold, according to his paper published in Proceedings of the IRE in 1937. Thus Crosby's work supplemented Armstrong's paper in 1936. In 1934 Armstrong began working for RCA at the request of the president of RCA, David Sarnoff.
1940 49 Years Old He was an avid tennis player until an injury in 1940, and drank an Old Fashioned with dinner. … Read More


1941 50 Years Old …  He was awarded the 1941 Franklin Medal.
1942 51 Years Old He received in 1942 the AIEEs Edison Medal "for distinguished contributions to the art of electric communication, notably the regenerative circuit, the superheterodyne, and frequency modulation". … Read More
1946 55 Years Old …  In 1946 the FCC's decision to use Armstrong's FM system as the standard for NTSC television sound gave Armstrong another chance at royalty payments. … Read More


1954 63 Years Old On 31 January 1954 Armstrong removed the air conditioner from the window and jumped to his death from the thirteenth floor of his New York City apartment. … Read More
Original Authors of this text are noted on http://en.wikipedia.org/wiki/Edwin_Howard_Armstrong.
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