Title :
The Ebers-Moll Effect Transistor Used as a Low-Value Controlled Resistor in ACC and Other Variable-Gain Applications
Author :
Thielking, Roger C. ; Korolenko, Andrey V.
Author_Institution :
HMED, General Electric Company
Abstract :
An Automatic Chroma Control (ACC) amplifier was developed using for gain control a conventional small signal transistor operating as a variable degeneration element in the emitter of the amplifier stage. The gain-control transistor was operating around the knee of its collector characteristic, and acted like a linear variable resistor. The resistance was controlled by a small DC current in the base. Mathematically, the behavior of such transistor was described by Ebers and Moll in 1954 -hence the name.
Keywords :
Automatic control; Circuits; Cutoff frequency; Electric variables control; FETs; Gain control; Impedance; Knee; Resistors; Voltage;
Journal_Title :
Broadcast and Television Receivers, IEEE Transactions on
DOI :
10.1109/TBTR1.1973.299757
