Title :
Program-Operated Level-Governing Amplifier
Author :
Black, W.L. ; Norman, N.C.
Author_Institution :
Bell Telephone Laboratories, Inc., New York, N.Y.
Abstract :
In program material, the volume varies momentarily over a wide range. By reducing this range within reasonable limits, it is possible to increase the effective signal output of broadcast transmitters. Amplifier systems designed to reduce the volume range automatically have been in use for some time. The apparatus to be described here is an improvement in this type of device.
Keywords :
Broadcasting; Circuits; Degradation; Harmonic distortion; Linearity; Noise level; Radio transmitters; Signal processing; Speech; Voltage;
Journal_Title :
Proceedings of the IRE
DOI :
10.1109/JRPROC.1941.233013
