公开(公告)号：US3766486A

公开(公告)日：1973-10-16

申请号：US3766486D

申请日：1972-06-12

Applicant: ERICSSON TELEFON AB L M

Inventor： OUVRIER F

IPC: H03G3/00 ,  H03G3/30

CPC classification number: H03G3/005

Abstract: An arrangement to keep the range of control of a control element within desired limits especially for signal level regulation by means of a pilot signal, for example, in the repeaters of a carrier frequency system in which a control signal dependent on the amplitude of the pilot signal sets a control element which determines the amplification of the respective repeater. The arrangement controls the current which feeds the control element. The arrangement contains a first and a second parallel current branch each containing a voltage divider whose tap is connected to a definite potential through a Zener diode for limiting the current in either direction. The attenuation characteristic of the control element thus has two break points one in the lower part of the range of control and one in the upper part due to the current limitation and the amplification of the repeater becomes constant outside a range determined by the break points.

Abstract translation: 控制元件的控制范围特别适用于借助于导频信号的信号电平调节的装置，例如在载波频率系统的中继器中，其中取决于导频的幅度的控制信号 信号设置控制元件，其确定各个中继器的放大。 该装置控制馈送控制元件的电流。 该装置包括第一和第二并联电流分支，每个分支包含分压器，其分接器通过齐纳二极管连接到一定电位，以限制任一方向上的电流。 因此，由于电流限制，控制元件的衰减特性在控制范围的下部有一个断点，在上部有一个断点，并且中继器的放大在由断点确定的范围之外变得恒定。