Title :
Circuit for Neutralizing Low-Frequency Regeneration and Power-Supply Hum
Author_Institution :
China Defense Supplies, Inc., Washington, D.C., and Universal Trading Corporation, New York, N.Y.
Abstract :
In high-gain multistage amplifiers, low-frequency regeneration frequently exists which affects the amplification characteristics of the amplifier and commonly causes oscillations and "motor-boating." A simple bridge-balancing circuit has been devised to neutralize this effect. Besides reducing regeneration, it also reduces the effects due to hum present across the plate-supply filter. Reductions in the order of 40 decibels are attainable.
Keywords :
Cathodes; Circuits; Conducting materials; Conductivity; Filters; Frequency; Impedance; Power supplies; Skin effect; Voltage;
Journal_Title :
Proceedings of the IRE
DOI :
10.1109/JRPROC.1942.232014
