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    • 96. 发明授权
    • Electron beam focusing device for use in a CRT
    • 用于CRT的电子束聚焦装置
    • US4980606A
    • 1990-12-25
    • US243850
    • 1988-09-13
    • Masaaki YamauchiYasuo Tanaka
    • Masaaki YamauchiYasuo Tanaka
    • H01J29/62H01J29/88
    • H01J29/88H01J29/624H01J2229/4827H01J2229/882
    • An electron beam focusing device for use in a cathode ray tube (CRT) including a first and a second conductor film each formed on the inner surface of a neck portion of the CRT, which are spaced apart from each other by a predetermined distance, and a resistive conductor film which connects the first and second conductor films with each other. The first conductor film is located before the second conductor film in a beam travelling direction. The additional conductor film has a higher resistivity than that of the first and second conductor films. The first conductor film is set at a higher potential than the second conductor film. A dark current flowing from a high potential side through the first conductor film, the resistive conductor film and the second conductor film produces a voltage drop across the resistive conductor film so that the surface potential of the resistive conductor film is stabilized, thus forming an electrostatic lens with a stabilized electric field.
    • 一种用于阴极射线管(CRT)的电子束聚焦装置,其包括第一和第二导体膜,每个第一导体膜和第二导体膜分别形成在阴极射线管颈部的内表面上,彼此间隔一预定距离;以及 电阻导体膜,其将第一和第二导体膜彼此连接。 第一导体膜位于第二导体膜之前沿光束移动方向。 附加导体膜的电阻率高于第一和第二导体膜的电阻率。 第一导体膜被设置在比第二导体膜更高的电位。 从高电位侧流过第一导体膜,电阻导体膜和第二导体膜的暗电流在电阻性导体膜上产生电压降,使得电阻导体膜的表面电位稳定,从而形成静电 透镜具有稳定的电场。
    • 98. 发明授权
    • Digital network system having arrangement for testing digital subscriber
line
    • 具有用于测试数字用户线路的数字网络系统
    • US4766594A
    • 1988-08-23
    • US863040
    • 1986-05-14
    • Yasunori OgawaKenji TsutsumiYasuo TanakaRyoji Shimozono
    • Yasunori OgawaKenji TsutsumiYasuo TanakaRyoji Shimozono
    • H04M3/30H04L12/26H04M3/24H04Q11/04H04B3/46
    • H04Q11/045H04M3/245H04M3/303H04M3/301
    • A digital network system having an arrangement for testing a digital subscriber line includes a switching device, an exchange terminal device as a subscriber circuit connected with the switching device, a subscriber line connected with the exchange terminal device, a network terminal device at a subscriber's side connected between the subscriber line and terminal equipment devices. The network terminal device includes a turn-around portion for forming a turn-around loop through which the turning-around of a signal to the subscriber line connected with the network termination device is carried out, and a discrimination portion for detecting that data transmission can be carried out and cancelling the formation of the turn-around loop. The turn-around loop is formed when a frame synchronization bit signal from the exchange terminal device is received by the network terminal device and cancelled when the discrimination portion detects that data transmission can be carried out. Communication for either a monitoring of transmission or a bit error testing can be carried out between the network terminal device and the switching device while the turn-around loop is formed, and data transmission between the exchange terminal device and the terminal equipment devices can be carried out after the turn-around loop is cancelled.
    • 具有用于测试数字用户线路的布置的数字网络系统包括交换设备,作为与交换设备连接的用户电路的交换终端设备,与交换终端设备连接的用户线路,在用户侧的网络终端设备 连接在用户线路和终端设备设备之间。 网络终端装置包括转向部,用于形成转向回路,通过该回转回路执行到与网络终端装置连接的用户线路的信号的转弯,以及用于检测数据传输的判别部分 执行并取消回转循环的形成。 当来自交换终端设备的帧同步位信号被网络终端设备接收时,形成转向环路,并且当鉴别部分检测到可以执行数据传输时被解除。 在形成转向环路的同时,可以在网络终端装置与交换装置之间进行用于传输监视或位错误测试的通信,并且可以承载交换终端装置与终端设备装置之间的数据传输 在转向循环被取消之后出来。