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差分信号输入

Other Parts Discussed in Thread: TRF3705

下图1是正交模块TRF3705的输入配置电路,图2是9和10管脚的说明。这里的9,10号管脚接入的是差分信号,想问下这里信号线分别接49.9欧的电阻到地有什么作用?为什么选49.9欧?