Video encyclopedia

31/01/1954 American electrical engineer and inventor Edwin Howard Armstrong dies


Edwin Howard Armstrong


How FM Radio Began

He is best known for developing FM (frequency modulation) system. FM is the encoding of information in a carrier wave by varying the instantaneous frequency of the wave. This contrasts with amplitude modulation, in which the amplitude of the carrier wave varies, while the frequency remains constant.
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    • Essentials 

    • Personal 

    • Regenerative circuit 

    • Superheterodyne circuit 

    • Wide-band FM radio 

    • FM radar 

    • Death 

    • Legacy