DocumentCode
1236163
Title
Radio Frequency Pulsewidth Modulation
Author
Raab, Frederick H.
Author_Institution
Cincinnati Electronics Corp., Cincinnati, Ohio
Volume
21
Issue
8
fYear
1973
fDate
8/1/1973 12:00:00 AM
Firstpage
958
Lastpage
966
Abstract
The width of a train of square pulses can be varied to produce a modulated carrier at the pulse repetition frequency. When the pulse train is generated by switching (class D) transistors, highefficiency operation is possible. The efficiency of this type of amplifier can be significantly higher than that of conventional pulsewidth modulation amplifiers, since the switching rate is reduced. In addition, the spectrum of a bipolar pulse train so modulated has the highly desirable property of all spurious products being band limited near the odd harmonics of the carrier.
Keywords
AM; PWM (pulse-width modulation); Pulse width modulations; Transistor switches; Frequency modulation; Low pass filters; Pulse amplifiers; Pulse generation; Pulse modulation; Pulse width modulation; Radio frequency; Radiofrequency amplifiers; Space vector pulse width modulation; Voltage;
fLanguage
English
Journal_Title
Communications, IEEE Transactions on
Publisher
ieee
ISSN
0090-6778
Type
jour
DOI
10.1109/TCOM.1973.1091763
Filename
1091763
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