Armstrong, Edwin Howard

Armstrong, Edwin Howard,

1890–1954, American engineer and radio inventor, b. New York City, grad. Columbia (E.E. 1913). He was associated in research with Michael I. PupinPupin, Michael Idvorsky
, 1858–1935, American physicist and inventor, b. Idvor, Hungary (now in Serbia), grad. Columbia (B.A., 1883). He came to the United States in 1874 and from 1889 was associated with Columbia (as professor of electromechanics, 1901–31).
..... Click the link for more information. at Columbia and became professor there in 1934. Armstrong received numerous awards for his contributions to the development of radio, which include the invention of the regenerative circuit (1912); the superheterodyne circuit (1918), the basic circuit of nearly all modern radio receivers; the superregenerative circuit (1920); and wideband frequency modulationmodulation,
in communications, process in which some characteristic of a wave (the carrier wave) is made to vary in accordance with an information-bearing signal wave (the modulating wave); demodulation is the process by which the original signal is recovered from the wave
..... Click the link for more information. (FM) system (1925–33). In 1947 he received the Medal of Merit for his contributions to military communications during World War II.

单词	armstrong, edwin howard
释义	DictionarySeeArmstrong Armstrong, Edwin Howard Armstrong, Edwin Howard, 1890–1954, American engineer and radio inventor, b. New York City, grad. Columbia (E.E. 1913). He was associated in research with Michael I. PupinPupin, Michael Idvorsky , 1858–1935, American physicist and inventor, b. Idvor, Hungary (now in Serbia), grad. Columbia (B.A., 1883). He came to the United States in 1874 and from 1889 was associated with Columbia (as professor of electromechanics, 1901–31). ..... Click the link for more information. at Columbia and became professor there in 1934. Armstrong received numerous awards for his contributions to the development of radio, which include the invention of the regenerative circuit (1912); the superheterodyne circuit (1918), the basic circuit of nearly all modern radio receivers; the superregenerative circuit (1920); and wideband frequency modulationmodulation, in communications, process in which some characteristic of a wave (the carrier wave) is made to vary in accordance with an information-bearing signal wave (the modulating wave); demodulation is the process by which the original signal is recovered from the wave ..... Click the link for more information. (FM) system (1925–33). In 1947 he received the Medal of Merit for his contributions to military communications during World War II. See Armstrong See Armstrong
随便看	gauffering iron gauffering press gauffers gauffre gaufrage gaufrette gaug gaugamela gauge gaugeable gaugeably gauge act of 1846 gauge and toolmakers association gauge blocks gauge board gauge boson gauge bosons gauge bosons, gauge theory gauge box gauge cock gauge concussion gauge connection gauge coupling unification gauge curvature gauged