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    Automatic gain control for encoded data
    3.
    发明授权
    Automatic gain control for encoded data 失效
    编码数据的自动增益控制

    公开(公告)号：US3904824A

    公开(公告)日：1975-09-09

    申请号：US42846773

    申请日：1973-12-26

    Applicant: IBM

    Inventor： CARAGLIANO EDWARD S ,  NICK HOWARD H

    IPC: H04B3/10 ,  H03G3/20 ,  H03G3/30 ,  H04L5/22 ,  H04L27/08 ,  G01R27/28 ,  H04L25/52

    CPC classification number: H03G3/3005 ,  H04L27/08

    Abstract: Automatic gain control is provided for a transmission system wherein the data is transmitted in frames including one or more flag bits. Circuitry is included for selecting one of the flag bits and further circuitry provides recirculation of the selected flag bit to provide a repetitive pulse output of the selected flag bit for the respective frame of data. The repetitive pulse output is filtered to obtain a substantially DC level which is indicative of the signal energy of the frame of data and which is applied to an amplifier to adjust the gain thereof so as to maintain the data at a predetermined energy level.

    Abstract translation: 为传输系统提供自动增益控制，其中以包含一个或多个标志位的帧发送数据。 包括用于选择一个标志位的电路，并且进一步的电路提供所选择的标志位的再循环以提供用于相应数据帧的所选标志位的重复脉冲输出。 对重复脉冲输出进行滤波以获得表示数据帧的信号能量并且被施加到放大器以调整其增益以便将数据保持在预定能级的基本上的DC电平。

    Directional nonreturn to zero computer bussing system
    4.
    发明授权
    Directional nonreturn to zero computer bussing system 失效
    方向无零点到零电脑总线系统

    公开(公告)号：US3619504A

    公开(公告)日：1971-11-09

    申请号：US3619504D

    申请日：1969-12-24

    Applicant: IBM

    Inventor： VEER JOHN A DE ,  NICK HOWARD H

    IPC: G06F13/40 ,  H03H7/48 ,  H04L12/40 ,  H04B1/58

    CPC classification number: H03H7/48 ,  G06F13/4072

    Abstract: A high-speed data transmission network employing data representations as changes in voltage along a transmission line. Directional coupling elements are spaced along the transmission line to couple information from the transmission line to stub lines. Each stub line is connected to a receiver circuit designed to interpret pulses on the stub line as one binary state and no pulses on the stub line as a second binary state.

    Directional coupled data transmission system
    7.
    发明授权
    Directional coupled data transmission system 失效
    方向耦合数据传输系统

    公开(公告)号：US3863024A

    公开(公告)日：1975-01-28

    申请号：US42776873

    申请日：1973-12-26

    Applicant: IBM

    Inventor： CARAGLIANO EDWARD S ,  NICK HOWARD H

    IPC: H01P1/00 ,  H04B3/00 ,  H04B3/14 ,  H04L25/03 ,  H04L25/04 ,  H04L11/00

    CPC classification number: H04L25/03127

    Abstract: A combination is provided of a directional coupler connected in a transmission line of a data transmission system and an encoding means for generating the data bits of information which, when coupled through the directional coupling means, produces a coupled signal having a substantially fixed width regardless of the length of the transmission line traversed and a height which diminishes comparatively slowly with the transmission line length traversed. The directional coupling means has a coupling coefficient of at least 0.5 and has an electrical length which is substantially equivalent to one quarter of a bit length of the encoded information. The encoding means for the data bits of information generate at least one of the encoded bits identified by a full cycle signal having an equal positive and negative excursion.

    Abstract translation: 提供了连接在数据传输系统的传输线中的定向耦合器和编码装置的组合，用于产生当通过定向耦合装置耦合时产生具有基本固定宽度的耦合信号的数据位，而不管 传输线的长度和穿过传输线长度相对较慢的高度。 定向耦合装置具有至少为0.5的耦合系数，并且具有基本上等于编码信息的位长度的四分之一的电长度。 用于信息的数据位的编码装置生成由具有相等的正偏移和负偏移的全周期信号所识别的至少一个编码比特。

    Stripline directional coupling device
    8.
    发明授权
    Stripline directional coupling device 失效
    STRIPLINE方向连接装置

    公开(公告)号：US3601716A

    公开(公告)日：1971-08-24

    申请号：US3601716D

    申请日：1969-12-24

    Applicant: IBM

    Inventor： BOLT MURRAY H ,  NICK HOWARD H ,  UBERBACHER EDWARD C

    IPC: H01P5/18 ,  H01P3/08 ,  H01P5/14

    CPC classification number: H01P5/185

    Abstract: A segment of a main transmission line is located equidistant between and parallel to a first and second coupling segment. The first coupling segment has an input terminal at one end thereof for connection to a stub line. The second coupling element has a terminating impedance located at the end thereof opposite said input terminal end of said first coupling segment. A conductor connects the other opposite ends of said first and second coupling segments so that a pulse travelling thru said main line segment or said first coupling segment in a direction away from said input terminal end of said first coupling segment will couple to the other travelling in the reverse direction.

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