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    • 1. 发明授权
    • Circuit arrangement for the insertion of telephone channels in the intermediate frequency junctions for repeater stations
    • 电话通道在中转站的中间频段插入电路布置
    • US3632891A
    • 1972-01-04
    • US3632891D
    • 1969-10-28
    • SELENIA IND ELETTRONICHE
    • BASINI BRUNOCAROLL IGNAZLO
    • H04B7/15H04B7/155H04J1/10
    • H04J1/10
    • A circuit arrangement for the insertion of additional communication channels such as telephone channels and the like in the intermediate frequency junctions of the relaying stations, wherein the intermediate frequency signal, coming from the receiver of the station, is applied to a first frequency converter associated to a first conversion oscillator, said first converter being coupled through a band pass filer to a second frequency converter associated to a second conversion oscillator, wherein at least one of said conversion oscillators can be modulated by the signals of the channels to be added, and at least one of the two conversion oscillators is controlled by the error signal coming from a phase detector piloted by the signal coming from a first and a second frequency divider respectively connected to the input to, and the output from the system.
    • 用于在中继站的中频接头中插入诸如电话信道等的附加通信信道的电路装置,其中来自站的接收机的中频信号被施加到与第一变频器相关联的第一变频器 第一转换振荡器,所述第一转换器通过带通滤波器耦合到与第二转换振荡器相关联的第二频率转换器,其中所述转换振荡器中的至少一个可以被待添加的信道的信号调制,并且在 两个转换振荡器中的至少一个由来自由分别连接到系统的输入和输出的第一和第二分频器的信号引导的相位检测器的误差信号控制。