求助各位，不知各位有没有用过预加重（preemphasis）的485芯片？我们最近准备做预加重485的实验，请问除了MAX3291/3292之外，还有人用过其他型号的芯片吗？
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预加重（preemphasis）的485芯片
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关键词： 加重 preemphasis 芯片
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自己顶一下，请问没人知道么？
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