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LMH5401和LMH6401级联中间的0欧姆电阻是什么作用啊,级联不需要阻抗匹配吗?

Other Parts Discussed in Thread: LMH6401, LMH5401

  • 您好,这里LMH5401 和LMH6401 直接DC耦合,差分输出的每个输出端可以走50ohm阻抗匹配,6401 的输入端已经内置100ohm阻抗匹配电阻。
    这里的0ohm我认为相当于预留电阻的位置,就像6401的输出端,串联了40ohm阻抗和内置10ohm串联一共为50ohm阻抗 。
  • 阻抗匹配预留。
    当两放大器足够近,行波理论就会失效,也就无需匹配。反之不行。