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File:Amplitude modulation detection.png

From Wikipedia, the free encyclopedia

Original file(791 × 783 pixels, file size: 31 KB, MIME type: image/png)

This physics image could be re-created using vector graphics as an SVG file. This has several advantages; see Commons:Media for cleanup for more information. If an SVG form of this image is available, please upload it and afterwards replace this template with {{vector version available|new image name}}.


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Summary

Description
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.
Date
Source 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
Author Harry J. Marx or Adrian Van Muffling
Permission
(Reusing this file)
Public Domain in USA - Published before 1923 in USA

Licensing

Public domain
Public domain
This media file is in the public domain in the United States. This applies to U.S. works where the copyright has expired, often because its first publication occurred prior to January 1, 1929, and if not then due to lack of notice or renewal. See this page for further explanation.

United States
United States
This image might not be in the public domain outside of the United States; this especially applies in the countries and areas that do not apply the rule of the shorter term for US works, such as Canada, Mainland China (not Hong Kong or Macao), Germany, Mexico, and Switzerland. The creator and year of publication are essential information and must be provided. See Wikipedia:Public domain and Wikipedia:Copyrights for more details.

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Date/TimeThumbnailDimensionsUserComment
current23:54, 20 January 2010Thumbnail for version as of 23:54, 20 January 2010791 × 783 (31 KB)Chetvorno{{Information |Description={{en|Graphs of the detection (demodulation) process for amplitude modulated (AM)radio signals, adapted from a 1922 radio book. Alterations to image: added vertical axis to top drawing, and colored labels.}} |Source=Downloaded
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