公开(公告)号：US20060224345A1

公开(公告)日：2006-10-05

申请号：US11098695

申请日：2005-04-04

申请人： Fred Ives ,  James Summers ,  Brad Andersen

发明人： Fred Ives ,  James Summers ,  Brad Andersen

IPC分类号： G01R35/00 ,  G06F19/00

CPC分类号： G01R35/005 ,  G01R31/2849 ,  H05K1/0201 ,  H05K1/0237 ,  H05K1/0268 ,  H05K1/162 ,  H05K2201/10151 ,  H05K2203/163 ,  H05K2203/165

摘要： A system and method is designed to measure its own environmentally caused inaccuracies and, based upon these measurements, adjust itself to compensate for the inaccuracies. In one embodiment, a test system first measures the signal loss through a model “long” path constructed in the same substrate as is the main test circuit. Since the test path is constructed on the same substrate it then represents the actual environmental impact on the test circuit. The test signal is then sent through a “short” test path and the ratio difference from a reference measurement condition between the two paths yields the necessary compensation which is then used to calibrate the test circuit. In another embodiment, a test signal is applied across a capacitance made up of copper on different layers of substrate material. The actual environmental conditions on the substrate layers modify the measured capacitance value, which is then provided along with temperature as input to a model which determines compensation for the test circuit. Both embodiments can be applied to individual circuits or to systems that are subject to environmentally induced changes to their transmission line loss characteristics.

摘要翻译： 一种系统和方法旨在衡量其自身对环境造成的不准确性，并根据这些测量值进行调整以补偿不准确之处。 在一个实施例中，测试系统首先通过在与主测试电路相同的衬底中构造的模型“长”路径来测量信号损耗。 由于测试路径构造在相同的基板上，那么它代表了对测试电路的实际环境影响。 然后通过“短”测试路径发送测试信号，并且与两个路径之间的参考测量条件的比率差产生必要的补偿，然后用于校准测试电路。 在另一个实施例中，将测试信号跨越由不同的衬底材料层上的铜组成的电容施加。 衬底层上的实际环境条件修改了测量的电容值，然后随温度输入到确定测试电路补偿的模型中。 这两个实施例都可以应用于单独的电路或者受环境影响的传输线损耗特性的改变的系统。