DocumentCode
1195880
Title
The loop-gain modulator: A new class of linear amplitude modulators
Author
Comer, David J. ; Christiansen, Michael L. ; Fox, David K.
Volume
34
Issue
10
fYear
1987
fDate
10/1/1987 12:00:00 AM
Firstpage
1161
Lastpage
1164
Abstract
A new type of class A modulator is introduced. This circuit, called the loop-gain modulator, exhibits a high degree of modulation linearity even for an index of modulation approaching unity. The concept is based on modifying the loop-gain of an oscillator with the modulating voltage. An analysis is done for the RC phase shift oscillator, although the method can be used with any oscillator. Experimental results that verify this analysis are reported.
Keywords
AM; Bipolar transistor circuits; Communication networks; Oscillator stability; RC oscillators; Amplitude modulation; Bipolar transistors; Feedback loop; Frequency; Linearity; Power amplifiers; Power supplies; RLC circuits; Voltage; Voltage-controlled oscillators;
fLanguage
English
Journal_Title
Circuits and Systems, IEEE Transactions on
Publisher
ieee
ISSN
0098-4094
Type
jour
DOI
10.1109/TCS.1987.1086049
Filename
1086049
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