[问答]

直流测量错误

问答对人有帮助，内容完整，我也想知道答案 0 嗨，我正在使用Agilent 4142B进行晶体管直流测量（请参阅随附的实验设置）。我有2种设置，1。2个独立探头连接到4142B2。单探针卡，其中两个信号源的接地都用导线短接并连接到带有单个引脚的晶体管I具有测量误差用于晶体管的直流测量（请参见附带的测量数据）对于设置1，测量数据是正常。对于设置2，测量过程中电流会突然达到顺应性。测量误差的主要问题是什么？我怀疑当我们为设置2一起缩短接地时是否有不同的接地电位可能会影响测量。希望有人可以帮助解决这个问题。谢谢。测量数据.JPG46.5 KB 以上来自于谷歌翻译以下为原文 Hi, I am using Agilent 4142B for my transistor DC measurement (Please see the attached Experiment Setup). I have 2 type of setup, 1. 2 separate probes connected to 4142B 2. Single probe card where the ground for both signal source are shorted with a wire and connected to the transistor with a single pin I have a measurement error for DC measurement of the transistor (Please see the attached Measurement Data) For Setup 1, the measurement data is normal. For Setup 2, the current will suddenly hit the compliance during the measurement. What will be the main issue of the measurement error? I am suspecting if the different ground potential when we short the grounds together for Setup 2 may affect the measurement. Hopefully someone may help in this matter. Thank you. 附件 Experiment Setup.JPG33.8 KB Measurement Data.JPG46.5 KB 0
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答案对人有帮助，有参考价值 0 您好garypang，最可能的当然是不合适的电缆连接。每个SMU的接地端子连接到4142B主机内部相同的电路公共电位。所以，基本上，连接接地端子没有问题。此时，接地端子表示三轴电缆的外屏蔽。三轴电缆的内屏蔽是一个保护装置。由于其电位与信号线相同，以最大限度地减少信号线的泄漏，不要将每个SMU的保护线连接在一起。连接SMU端子时最可能出现的错误是在三轴和三极之间选择不合适的转换适配器。 BNC.Next可能的错误是使用“Sense”线来测量电流。 “Sence”线是潜在的遥感终端，所以在这种情况下必须使用“Force”线。不幸的是，这个产品不在本论坛的范围内。如果您有任何进一步的问题，请联系您当地的联系中心以便更快地获得回复。访问http://www.agilent.com并点击页面顶部边缘的“联系我们”按钮。联系当地的联络中心时，请详细说明每个SMU的设置，电压，测量范围，合规性等。此外，还可以发送一个命令列表来控制4142B进行此测量。最好的问候，yOkawa 以上来自于谷歌翻译以下为原文 Hello garypang, Most possible course is inappropriate cable connection. The ground terminal of each SMUs are connected to the same circuit common potential inside of the 4142B mainframe. So, basically, connecting ground terminal is not problem. This time, ground terminal indicates the outer shield of the triaxial cable. The inner shield of the triaxial cable is a guard. Since, its potential is same as the signal line to minimize a leakage from the signal line, do not connect the guard line of each SMU together. Most likely mistake when connecting the terminals of SMUs is selection of inappropriate choice of conversion adapters between triaxal and BNC. Next possible mistake is using the "Sense" line to measure current. "Sence" line is terminal for remote sensing of potential, so the "Force" line have to be used in this case. Anyway, unfortunately, this product is not covered by this forums. If you have any further question, please contact your local contact center to get reply more quickly. Visit http://www.agilent.com and click "Contact Us" button located on the top edge of the page. When contacting your local contact center, please includes detailed setup of each SMUs, voltage, measurement range, compliance etc. Also, it will be helpfult to send a list of commands to control the 4142B for this measurement. Best regards, yOkawa

2019-8-14 14:13:54 评论举报陈艾惠

答案对人有帮助，有参考价值 0 您确定已正确连接SMU的终端吗？选择了triaxal和BNC之间的正确转换？以上来自于谷歌翻译以下为原文 Are you sure you have correctly connected the terminals of SMUs? Have chosen the correct conversion between triaxal and BNC?

2019-8-14 14:27:30 评论举报王颖