Title :
A Low-Noise Amplifier
Author :
Wallman, Henry ; Macnee, Alan B. ; Gadsden, C.P.
Author_Institution :
Massachusetts Institute of Technology, Cambridge, Mass.
fDate :
6/1/1948 12:00:00 AM
Abstract :
This paper describes an amplifier circuit which yields very low noise factor, consisting of a grounded-cathode triode followed by a grounded-grid triode. The combination is entirely noncritical and provides the low noise factor of a triode with the high amplification and stability of a pentode. Noise factors averaging 0.25 db at a carrier frequency of 6 Mc. and 1.35 db at 30 Mc. have been achieved. Typical circuit details are given.
Keywords :
Broadband amplifiers; Circuit noise; Circuit stability; Frequency; Jamming; Low-noise amplifiers; Radar; Radio transmitters; Radiofrequency amplifiers; Receivers;
Journal_Title :
Proceedings of the IRE
DOI :
10.1109/JRPROC.1948.230275
