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    • 9. 发明授权
    • Method and apparatus for automatically checking position data of J-leads
    • 自动检查J型引线位置数据的方法和装置
    • US5940681A
    • 1999-08-17
    • US989274
    • 1997-12-12
    • Hartmut SeegerBernd Sommer
    • Hartmut SeegerBernd Sommer
    • H01L21/66G01N21/956H01L23/50G01R31/26
    • G01N21/956
    • There is disclosed a method for automatically checking position data of J-leads at a semiconductor component enclosed in a housing with respect to a plane parallel to the bottom side of the housing. The bottom side of the housing is illuminated by light from an illuminator at at least one reproducible angle. The light reflected from the bottom side of the housing and the leads at essentially right angles is picked up by a camera with high resolution. The image signals of the camera are fed to an image signal processing device, and at least one data record with an indicator assigned to the semiconductor component is stored. From the image signals, position data of the leads are determined. Any deviation of the position data from predetermined nominal values is determined by comparing the position data with reference data.
    • 公开了一种用于在相对于平行于壳体的底侧的平面的壳体中包围的半导体部件处自动检查J引线的位置数据的方法。 外壳的底部以至少一个可重复的角度从照明器的光照亮。 从壳体底部反射的光线和基本上直角的引线由高分辨率的相机拾取。 相机的图像信号被馈送到图像信号处理装置,并且存储具有分配给半导体部件的指示符的至少一个数据记录。 根据图像信号,确定引线的位置数据。 通过将位置数据与参考数据进行比较来确定位置数据与预定标称值的任何偏差。
    • 10. 发明授权
    • Digital radio system
    • 数字无线电系统
    • US4628517A
    • 1986-12-09
    • US778180
    • 1985-09-23
    • Wolfram SchwarzTheodor SchwierzBernd Sommer
    • Wolfram SchwarzTheodor SchwierzBernd Sommer
    • H04B7/12H04L1/04H04L27/10H04B7/02H04B15/00
    • H04B7/12H04L1/04
    • Frequency diversity is employed to counter selective fadings as a result of multi-path propagation for troposcatter and short-wave connections for digital useful signals employing frequency modulation. For this purpose, the digital useful signal is supported on a frequency arrangement comprising at least three radio frequencies in that the digital useful signal, together with at least one additional oscillation, and, in fact, an additional fundamental oscillation which determines the frequency of the spacing in radio-frequency frequency arrangement, is fed to the input of a frequency modulator. At the input end, the radio-frequency carriers of the frequency arrangement, which are each modulated with the useful signal, are all converted by coherent mixing into the same frequency level, from which, by way of a combiner, a sum signal is obtained which is the optimum in respect of signal-to-noise ratio.
    • 采用频率分集作为采用频率调制的数字有用信号的对流层散射和短波连接的多路径传播的结果的选择性衰落。 为此,在包括至少三个射频的频率布置上支持数字有用信号,其中数字有用信号连同至少一个额外的振荡,实际上是额外的基本振荡,其确定频率 射频频率排列间隔被馈送到频率调制器的输入端。 在输入端,用有用信号调制的频率布置的射频载波都通过相干混合转换成相同的频率电平,通过组合器获得和信号 这在信噪比方面是最佳的。