CIRCUIT FOR THE GENERATION OF A CONTROL VARIABLE FOR THE CONTROL OF THE TRANSFER CONSTANT OF ELECTRONICALLY ACTUABLE AMPLIFYING AND ATTENUATING MEMBERS

摘要

In a circuit for automatic dynamic compression or expansion the control voltage generator generates a control voltage which is linear against the logarithm of the input amplitude. This characteristic is achieved by a transfer member consisting of several transistors which are subject to different reference voltages and the series resistances of which are staggered.