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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
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。
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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
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。
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公开(公告)号：CA1024450A
公开(公告)日：1978-01-17
申请号：CA213800
申请日：1974-11-15
Applicant: IBM
Inventor： CARAGLIANO EDWARD S , NICK HOWARD H
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.
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Patent Agency Ranking
公开(公告)号：FR2275082A1
公开(公告)日：1976-01-09
申请号：FR7514479
申请日：1975-04-30
Applicant: IBM
Inventor： CARAGLIANO EDWARD S , NICK HOWARD H
Abstract: A data communication system is provided in which the data handling capacity of the system is doubled. The data in the system travels on a single wire in both directions simultaneously. Each pair of terminals associated with the communication system is interfaced with the single wire by a repeater. The repeater includes first and second directional couplers for coupling data signals from the repeater to the wire in the one direction and in the opposite direction, respectively, without substantial signal interference with signals being received by the repeater on the same wire. A wrap control function is included in the repeater which allows data signals to be placed on the wire going in the opposite direction from the received signals.
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公开(公告)号：DE2451487A1
公开(公告)日：1975-08-28
申请号：DE2451487
申请日：1974-10-30
Applicant: IBM
Inventor： CARAGLIANO EDWARD S , NICK HOWARD H
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.
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公开(公告)号：CA1019455A
公开(公告)日：1977-10-18
申请号：CA213803
申请日：1974-11-15
Applicant: IBM
Inventor： CARAGLIANO EDWARD S , NICK HOWARD H
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.
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公开(公告)号：FR2296279A1
公开(公告)日：1976-07-23
申请号：FR7536049
申请日：1975-11-17
Applicant: IBM
Inventor： CARAGLIANO EDWARD S , NICK HOWARD H
Abstract: A strip-line directional coupler is provided in which the volumetric size is reduced without a reduction in electrical characteristics. The input and output coupling lines are wound into separate spirals each having the same pitch so that they can be located at a fixed distance with respect to one another which is sufficiently close along their entire length to provide coupling of an input signal from the input coupling line to the output coupling line in the backwards direction. A first and second ground plane is located one on either side of and a small distance from each spirally wound input and output coupling line. A dielectric material is located between the input and output lines and between the ground planes and the input and output lines. The spirally wound input and output coupling lines provide improved electrical characteristics so as to enable a reduction of spacing of the first and second ground planes from either side of the spirally wound input and output coupling lines thereby further diminishing the volumetric size of the device into a small, flat package.
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公开(公告)号：DE2456178A1
公开(公告)日：1975-07-10
申请号：DE2456178
申请日：1974-11-28
Applicant: IBM
Inventor： CARAGLIANO EDWARD S , NICK HOWARD H
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.
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