Methods and apparatuses for transmission and reception of information
signals
    71.
    发明授权
    Methods and apparatuses for transmission and reception of information signals 失效
    用于发送和接收信息信号的方法和装置

    公开(公告)号:US5432800A

    公开(公告)日:1995-07-11

    申请号:US968406

    申请日:1992-10-29

    CPC classification number: H03M13/29 H03M13/33 H04L1/0083 H04L7/10 H04H2201/15

    Abstract: Method and apparatus for transmitting an information signal generate a plurality of block signals on the basis of the information signal, generate a plurality of parity block signals on the basis of the plural data block signals, generate a frame signal containing the plural data block signals and the parity block signals, and send out the frame signal. Each of the data block signals includes a first block synchronizing signal indicating the start of the data block signal, a data signal containing the information signal and a first parity signal derived by encoding the data signal. Each of the parity block signals incudes a second block synchronizing signal indicating the start of the parity block signal, a second parity signal and a third parity signal. Bit signals located at same bit positions in the respective second parity signals are derived by encoding bit signals located at the same positions in the respective data signals. Bit signals located at same bit positions in the respective third parity signals are derived by encoding the bit signals located at the same bit positions in the respective first parity signals or alternatively the third parity signal in each parity block signal is derived by encoding the second parity signal in each parity block signal.

    Abstract translation: 用于发送信息信号的方法和装置基于信息信号产生多个块信号,根据多个数据块信号产生多个奇偶校验块信号,生成包含多个数据块信号的帧信号,以及 奇偶校验块信号,并发出帧信号。 每个数据块信号包括指示数据块信号的开始的第一块同步信号,包含信息信号的数据信号和通过对数据信号进行编码导出的第一奇偶校验信号。 每个奇偶校验块信号包括指示奇偶校验块信号的开始的第二块同步信号,第二奇偶校验信号和第三奇偶校验信号。 通过对位于相应数据信号中的相同位置的位信号进行编码,导出位于各个第二奇偶校验信号中相同位位置的位信号。 通过对位于相应的第一奇偶校验信号中的相同位位置的位信号进行编码,或者通过对第二奇偶校验位进行编码来导出每个奇偶校验块信号中的第三奇偶校验信号,导出位于相应的第三奇偶校验信号中位于相同位位置的位信号 信号在每个奇偶校验块信号。

    Automatic reflow apparatus with pressure equalization means
    72.
    发明授权
    Automatic reflow apparatus with pressure equalization means 失效
    具有压力均衡装置的自动回流装置

    公开(公告)号:US5296680A

    公开(公告)日:1994-03-22

    申请号:US21558

    申请日:1993-02-24

    Applicant: Osamu Yamada

    Inventor: Osamu Yamada

    CPC classification number: B23K1/008 H05K13/0061 H05K13/0465 B23K2201/40

    Abstract: An automatic soldering apparatus for soldering a printed circuit board includes a plurality of electronic elements mounted thereon to be soldered thereto. The apparatus is structured to have a first station provided with a first outer opening for enabling the printed circuit board to be transported therethrough into a heating chamber so as to be soldered therein and further provided with a first inner opening, a second station provided with a second outer opening for enabling the soldered printed circuit board to be transported therethrough out of the heating chamber, and further provided with a second inner opening, and a duct having one end opening and an opposite end opening, the one end opening being connected to the first inner opening of the first station and the opposite end opening being connected to the second inner opening of the second station, the areas of the first inner opening the one end opening being larger than the area of the first outer opening, and the areas of the second inner opening and the opposite end opening being larger than the area of the second outer opening.

    Abstract translation: 用于焊接印刷电路板的自动焊接装置包括安装在其上待焊接的多个电子元件。 该设备被构造成具有设置有第一外部开口的第一站,用于使印刷电路板能够通过其传送到加热室中,以便被焊接在其中并且还设置有第一内部开口,第二站设置有 第二外部开口,用于使焊接的印刷电路板能够从加热室输送出去,并且还设置有第二内部开口和具有一个端部开口和相对端部开口的管道,该一个端部开口连接到 第一站的第一内开口和与第二站的第二内开口连接的相对端开口,第一内开口的一端开口面积大于第一外开口的面积, 第二内开口和相对端开口大于第二外开口的面积。

    Method of forming a multilayer printed circuit board and apparatus
therefor
    74.
    发明授权
    Method of forming a multilayer printed circuit board and apparatus therefor 失效
    形成多层印刷电路板的方法及其装置

    公开(公告)号:US4908087A

    公开(公告)日:1990-03-13

    申请号:US332377

    申请日:1989-03-31

    Abstract: A method and an apparatus of forming a multilayer printed circuit board which can positively remove voids in the prepregs in the printed board and enhance the reliability of the produced printed circuit board and is superior in economy, wherein a laminated assembly of a plurality of printed circuit board components and a plurality of prepregs alternately laminated on each other is sandwiched between upper and lower jig plates, and the laminated assembly sandwiched between the jig plates is clamped between heating plates of a bonding press to heat the assembly to a predetermined temperature, and, thereafter, a pressure is applied to the upper and lower jig plates so as to urge them against each other for bonding the printed circuit board component and the prepregs. An exterior pressurizing means is provided around the printed circuit board components and the prepregs sandwiched between the upper and lower jig plates in order to prevent the molten prepregs from flowing outwardly, thereby raising the fluid pressure of the molten prepregs to squeeze out air bubbles existing in the prepregs.

    Abstract translation: 一种形成多层印刷电路板的方法和装置,其可以肯定地去除印刷电路板中的预浸料坯中的空隙,并提高所制造的印刷电路板的可靠性,并且经济性优异,其中多个印刷电路板 夹板组件和交替层叠在一起的多个预浸料坯被夹在上夹具板和下夹具板之间,并且夹在夹具板之间的层叠组件夹在粘合压力机的加热板之间以将组件加热至预定温度, 此后,向上下夹具板施加压力,以便将它们彼此推压以粘合印刷电路板部件和预浸料。 在印刷电路板部件和夹在上夹具板和下夹具板之间的预浸料坯周围设置有外部加压装置,以防止熔融预浸料坯向外流出,从而提高熔融预浸料坯的流体压力以挤出存在于 预浸料

    Error correction system for difference set cyclic code in a teletext
system
    76.
    发明授权
    Error correction system for difference set cyclic code in a teletext system 失效
    图文电视系统差分集循环码误差校正系统

    公开(公告)号:US4675868A

    公开(公告)日:1987-06-23

    申请号:US716044

    申请日:1985-03-26

    CPC classification number: H04N7/0357 H03M13/43

    Abstract: An error correction system for a difference set cyclic (272,190) code with 190 data bits and 82 test bits in a coded transmission teletext system which transmits character information on the vertical blanking interval of a television signal has been improved in peripheral circuits for operating an error correction circuit. A first improvement is to correct only designated packets which are in frame synchronization condition and/or designated by an index register. A second improvement is to handle shortened (L,k) code where L is less than 272, using common hardware. A third improvement is selection of three operational modes of data to be corrected. In the first mode, uncorrected data is supplied by an external circuit, and said uncorrected data is stored temporarily in a buffer memory, and corrected data is stored in said buffer memory again to supply external circuit corrected data. Transfer of data between the buffer memory and the error correction circuit is handled by wired logic hardware apparatus. In a second mode, uncorrected data and corrected data are provided in a buffer memory but no external circuit is concerned in operation of the present system. In a third mode, no buffer memory is used, and an external circuit supplies uncorrected data to an error correction circuit directly and receives corrected data directly from the error correction circuit.

    Abstract translation: 在用于在电视信号的垂直消隐间隔上发送字符信息的编码的传输图文电视系统中具有190个数据位和82个测试位的差分循环(272,190)码的纠错系统已被改进,用于操作错误 校正电路。 第一改进是仅校正处于帧同步状态的指定分组和/或由索引寄存器指定的分组。 第二个改进是使用通用硬件来处理L小于272的缩短(L,k)码。 第三个改进是选择要纠正的三种数据操作模式。 在第一模式中,未校正的数据由外部电路提供,并且所述未校正的数据被临时存储在缓冲存储器中,并且校正的数据被再次存储在所述缓冲存储器中以提供外部电路校正的数据。 缓冲存储器和纠错电路之间的数据传输由有线逻辑硬件设备来处理。 在第二模式中,未校正的数据和校正数据被提供在缓冲存储器中,但是在本系统的操作中没有外部电路。 在第三模式中,不使用缓冲存储器,并且外部电路将未校正的数据直接提供给纠错电路,并直接从纠错电路接收校正数据。

    N-Substituted-tetrahydroisophthalimide derivatives
    77.
    发明授权
    N-Substituted-tetrahydroisophthalimide derivatives 失效
    N-取代的四氢间苯二甲酰亚胺衍生物

    公开(公告)号:US4472190A

    公开(公告)日:1984-09-18

    申请号:US409182

    申请日:1982-08-18

    CPC classification number: C07D307/90 A01N43/12

    Abstract: A new N-substituted tetrahydroisophthalimde derivative represented by the formula: ##STR1## Wherein R.sub.1 and R.sub.2 are hydrogen or halogen, R.sub.3 is hydrogen or lower alkyl and R.sub.4 is alkyl which may be substituted by halogen or lower alkoxy, and preparation methods thereof and herbicidal composition comprising one or more of said derivatives as active ingredients, is disclosed.

    Abstract translation: 一种新的由下式表示的N-取代的四氢间苯二胺衍生物衍生物:其中R1和R2是氢或卤素,R3是氢或低级烷基,R4是可被卤素或低级烷氧基取代的烷基,其制备方法 并且包含一种或多种所述衍生物作为活性成分的除草组合物。

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