DocumentCode
1184039
Title
Armstrong´s Frequency Modulator
Author
Jaffe, D.L.
Author_Institution
Marcellus Hartley Laboratory, Department of Electrical Engineering, Columbia University, New York, N.Y.
Volume
26
Issue
4
fYear
1938
fDate
4/1/1938 12:00:00 AM
Firstpage
475
Lastpage
481
Abstract
When the side bands of an amplitude-modulated signal are shifted 90 degrees and then recombined with the carrier, a frequency-modulated carrier results. In this paper the order and magnitudes of the distortion components of such a frequency-modulated carrier are quantitatively determined assuming an idealized receiver. It is found that this type of distortion will be negligibly small after frequency multiplication to obtain the desired carrier frequency.
Keywords
Amplitude modulation; Demodulation; Equations; Frequency conversion; Frequency modulation; Laboratories; Voltage;
fLanguage
English
Journal_Title
Radio Engineers, Proceedings of the Institute of
Publisher
ieee
ISSN
0731-5996
Type
jour
DOI
10.1109/JRPROC.1938.228196
Filename
1686633
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