DocumentCode
1186074
Title
Control of the Effective Internal Impedance of Amplifiers by Means of Feedback
Author
Mayer, H.F.
Author_Institution
General Engineering Laboratory, General Electric Company, Schenectady, N.Y.
Volume
27
Issue
3
fYear
1939
fDate
3/1/1939 12:00:00 AM
Firstpage
213
Lastpage
217
Abstract
The effective internal impedance of an amplifier may be either increased or reduced by the proper choice of one or a combination of several of the following types of feedback: 1. positive current, 2. negative current, 3. positive voltage, or 4. negative voltage. Impedance-reducing feedback has been applied to audio-frequency power amplifiers to flatten the response and improve the loud-speaker damping. Impedance-increasing feedback has been applied to intermediate-frequency amplifiers to increase selectivity without loss of stability.
Keywords
Associate members; Damping; Electric resistance; Equations; Frequency; Impedance; Negative feedback; Power amplifiers; Stability; Voltage;
fLanguage
English
Journal_Title
Proceedings of the IRE
Publisher
ieee
ISSN
0096-8390
Type
jour
DOI
10.1109/JRPROC.1939.228140
Filename
1686868
Link To Document