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    • 1. 发明申请
    • PRINTED CIRCUIT BOARD
    • 印刷电路板
    • US20120007688A1
    • 2012-01-12
    • US12960321
    • 2010-12-03
    • HUA-LI ZHOUMING WEICHIA-NAN PAISHOU-KUO HSU
    • HUA-LI ZHOUMING WEICHIA-NAN PAISHOU-KUO HSU
    • H01P3/08
    • H05K1/0245H05K2201/09727
    • A printed circuit board includes an insulation layer and a signal layer attached to the insulation layer. The signal layer includes a pair of differential transmission lines. Width W of each of the differential transmission lines is changed according to change of space S between the differential transmission lines, based on the following formula: W = C   1 × H × ( C   2 × H 0.8  W 0 + T ) C   3 ×  C   4 × S 0 H - 1 1 - C   3 ×  C   4 × S H - 1.25  T In above formula, C1=7.475, C2=5.98, C3=0.48, C4=−0.96, H is a thickness of the insulation layer, W0 is an original width of each of the differential transmission lines, and S0 is an original space between the differential transmission lines, and T is a thickness of each of the differential transmission lines.
    • 印刷电路板包括绝缘层和附着到绝缘层的信号层。 信号层包括一对差动传输线。 差分传输线的宽度W根据以下公式根据差分传输线之间的空间S的变化而改变:W = C 1 / H×(C 2 2×H 0.8 W 0 + 在上式中,C 1 = 7.475,C 2 = 5.98,C 3 = C 9,C 3 = 0.48,C4 = -0.96,H是绝缘层的厚度,W0是差分传输线的原始宽度,S0是差动传输线之间的原始空间,T是各个差分传输线的厚度 差动传输线。
    • 4. 发明申请
    • SIGNAL TEST DEVICE FOR MOTHERBOARDS
    • MOTHERBOARDS信号测试设备
    • US20120013346A1
    • 2012-01-19
    • US12969413
    • 2010-12-15
    • LI XUMING WEI
    • LI XUMING WEI
    • G01R31/02
    • G06F11/221
    • A signal test device tests signal transmission performance of a DDR bus of a motherboard of a computer includes a connector, a checking module, and a number of signal collection units. The connector includes a number of connection pins. The checking module is electronically connected to the motherboard of the computer through the connection pins, and the checking module presets related a number of parameters of the DDR bus so that the motherboard can identify the signal test device. Each signal collection unit is electronically connected to the motherboard of the computer through the connection pins, and each signal collection unit includes a signal collection module. Each signal collection module provides a signal test point for collecting signals of the DDR bus.
    • 信号测试装置测试计算机主板的DDR总线的信号传输性能包括连接器,检查模块和多个信号采集单元。 连接器包括多个连接引脚。 检查模块通过连接引脚与计算机的主板电子连接,检查模块预设相关的DDR总线的多个参数,使主板能识别信号测试设备。 每个信号采集单元通过连接引脚与计算机的母板电子连接,每个信号采集单元包括信号采集模块。 每个信号采集模块都提供一个用于收集DDR总线信号的信号测试点。