Telephone speech network
    1.
    发明授权
    Telephone speech network 失效
    电话语音网络

    公开(公告)号:US4071713A

    公开(公告)日:1978-01-31

    申请号:US754430

    申请日:1976-12-27

    IPC分类号: H04M1/58 H04M1/60 H04M1/76

    CPC分类号: H04M1/585 H04M1/6025 H04M1/76

    摘要: An electronic circuit, for connecting a transmitter and receiver to a telephone line. The circuit operates on very low operating voltages from the line which allows parallel operation with a conventional set on long-loop applications. In its functional form, the circuit utilizes a bridge configuration having transistors in two of its legs, driven by the transmitter output, thereby eliminating the usual bridge balancing resistors therefrom and their concomitant operating voltage drops thereacross.

    摘要翻译: 一种用于将发射器和接收器连接到电话线的电子电路。 该电路在非常低的工作电压下工作,该线路允许在长循环应用中与传统的并联操作。 在其功能形式中,该电路利用由发射机输出驱动的其两条腿中的晶体管的桥接配置,从而消除了通常的桥接平衡电阻器,并且其伴随的工作电压下降。

    Telephone speech network
    2.
    发明授权
    Telephone speech network 失效
    电话语音网络

    公开(公告)号:US4031331A

    公开(公告)日:1977-06-21

    申请号:US649557

    申请日:1976-01-15

    IPC分类号: H04M1/58

    CPC分类号: H04M1/585

    摘要: In an electronic telephone a speech network for connecting a transmitter and receiver to a line powered telephone line which utilizes a bridge configuration that is so arranged that the network will function on very low d-c line voltages, thereby enabling the set to be connected in multi-party applications with a conventional hybrid transformer set on long loop applications.

    摘要翻译: 在电子电话中,用于将发射机和接收机连接到线路供电电话线路的语音网络,该线路供电电话线路利用布置成网络将在非常低的直流线路电压上起作用的桥接配置, 传统的混合变压器在长循环应用中设置了第三方应用。