On this day in 1890, Edwin Armstrong, the American inventor of FM radio was born.
Armstrong 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.
For more on Edwin Armstrong, read his biography Man of High Fidelity.
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