Devices for controlling amplitude characteristics of telephonic signals

Autor: A. C. Norwine
Rok vydání: 1939
Předmět:
Zdroj: Electrical Engineering. 58:62-67
ISSN: 0095-9197
DOI: 10.1109/ee.1939.6431780
Popis: This paper describes a family of devices which automatically respond to signals and control the circuit amplification in such a way as to improve transmission. Their general characteristics are outlined, their differences explained, and some of their applications are listed.
Databáze: OpenAIRE