公开(公告)号：US4185248A

公开(公告)日：1980-01-22

申请号：US938396

申请日：1978-08-31

申请人： Hisaki Namura ,  Koichi Ohta ,  Masao Takeda ,  Kiyoshi Minematsu

发明人： Hisaki Namura ,  Koichi Ohta ,  Masao Takeda ,  Kiyoshi Minematsu

IPC分类号： H03G3/30 ,  H04B3/10 ,  H04B17/00 ,  H04J1/16 ,  H03G3/20

CPC分类号： H04B3/10 ,  H04J1/16

摘要： Disclosed is a system for supervising the level of input applied to a level regulator using a pilot signal. According to the invention, an input level supervisory circuit is provided which utilizes a level adjusting variable element of the level regulator, or employs a particular variable element arranged to be driven by means of the control voltage for said level adjusting variable element simultaneously with the latter element and having characteristics equal thereto, and which has a transmission ratio in a reciprocal or inverse relationship to the alternating current transmission ratio of a main signal alternating current transmission line of the level regulator. The input level supervisory circuit is supplied with an input voltage or current from a direct current constant-voltage power source or a direct current constant-current power source to generate an output voltage by means of which supervision of the level of the pilot signal input to the level regulator is performed.

摘要翻译： 公开了一种用于监视使用导频信号施加到电平调节器的输入电平的系统。 根据本发明，提供了一种输入电平监控电路，其利用电平调节器的电平调节可变元件，或者采用通过用于所述电平调节可变元件的控制电压来驱动的特定可变元件 元件，具有与其相同的特性，并且其具有与电平调节器的主信号交流传输线的交流传输比成倒数或相反关系的传输比。 输入电平监控电路被提供有来自直流恒压电源或直流恒流电源的输入电压或电流以产生输出电压，通过该输出电压监视导频信号的电平输入到 执行电平调节器。