USB 2.0通信,TUSB211输入和输出都接到连接器,产品有很高的EMC要求,请问TUSB211输入、输出端都要加共模电感吗?还是只在输入端加就行?或者两端都不加共模电感都可以?谢谢!
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USB 2.0通信,TUSB211输入和输出都接到连接器,产品有很高的EMC要求,请问TUSB211输入、输出端都要加共模电感吗?还是只在输入端加就行?或者两端都不加共模电感都可以?谢谢!
Hi Zehao,
这个很难有一定之规, TUSB211对信号的增强作用,主要是对上升边沿注入电流使其变得更陡峭,以满足长距离传输眼图变差,理论上对EMC会带来一定的负面影响。如果如你所说对EMC要求很高,建议在输出输入都加上共模电感。