An additional advantage of this connection is that input resistance approaches infinity as the capacitor C1 approaches full charge, eliminating errors due to loading of the source resistance.

上面这个电路的另一个优点在于，当电容c1充电完毕后，输入电阻将趋于无穷大，因此可以消除因信号源内阻产生的误差。

youdao

Another type of termination, ac coupled termination, adds a small capacitor in series with the termination resistor to eliminate the DC loading effect.

另一种类型终端电阻——AC耦合的终端电阻，增加一只小电容器串联在终端电阻上就消除了它的DC负载效应。

youdao