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输入1MHZ的阶跃信号,运放组成的积分电路输出如何还原出输入的信号?

输入1MHZ的阶跃信号,运放组成的积分电路输出如何还原出输入的信号?

选择什么样的运放比较合适?积分电路中的电阻和电容如何进行计算?阻值和容值选择多大?还请指导下

就是C3、(R6,RW1)运放U1怎么选择?