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数据搜索系统，热门电子元器件搜索 |
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AN3213 数据表(PDF) 33 Page - STMicroelectronics |
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AN3213 数据表(HTML) 33 Page - STMicroelectronics |
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33 / 64 page  AN3213 ST7570 demonstration board description Doc ID 17429 Rev 1 33/64 Figure 24. ZC_IN_A vs. mains voltage - delay measurement Figure 25. ZC_IN_A vs. mains voltage - jitter measurement 7.1.5 Input impedance The input impedance of a power line communication node is another critical point. According to the network impedance measurements carried out in some European distribution networks (Italy, Germany and France) the following characteristics can be associated to the impedance of a typical low-voltage (LV) power line: ● Typical impedance magnitude is around 5 Ω ● Nearly 90 % of measured values range between 0.5 and 10 Ω ● The impedance value depends on the measurement point ● The measured value changes over time. |
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