Amplitude modulation detection

Forfatter/Opretter:

Harry J. Marx or Adrian Van Muffling

Kredit:

Downloaded 2010-01-20 from Harry J. Marx, Adrian Van Muffling (1922) Radio Reception: A simple and complete explanation of the principles of radio telephony, G.P. Putnam's sons, New York, p.43, fig.27 on Google Books

Shortlink:

https://dkwiki.dk/b/362e4

kilde:

Wikimedia Commons

størrelse:

791 x 783 Pixel (31357 Bytes)

beskrivelse:

Graphs of the detection (demodulation) process for amplitude modulated (AM) radio signals, adapted from a 1922 radio book. (A) The amplitude modulated signal applied to the detector. (B) The signal at the output of the detector. The detector allows current in only one direction, stripping off the excursions of the signal on one side. (C) After filtering. The filter smoothes the output, removing the radio frequency carrier pulses, leaving the audio frequency signal (modulation). Alterations to image: added vertical axis to top drawing, and colored labels.

Licens:

Public domain

Kommentar på licensen:

Public Domain in USA - Published before 1923 in USA