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请教TI工程师或各位大神,数字功放tpa3251图中的电容电阻(红圈中的)很奇怪,是起什么作用的?

Other Parts Discussed in Thread: TPA3251

tpa3251手册中的电路图,谁能给解释一下画圈中的电容电阻的作用?是提高解析度的吗?功放芯片耦合电容输入之前是5532的反相放大电路我没有画