Legacy
The Armstrong method is no longer used commercially. Frequency modulation is most commonly generated at the operating frequency with the required deviation. While the system was being used in the 1930s and 1940s it provided a high quality FM audio system.
Read more about this topic: Armstrong Phase Modulator
Famous quotes containing the word legacy:
“What is popularly called fame is nothing but an empty name and a legacy from paganism.”
—Desiderius Erasmus (c. 1466–1536)