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运放的自激怎么处理

我经常会碰到当设计一些放大倍数很高的放大电路的时候,经过多级放大处理的话会直接导致,运放系统输出进入饱和区,加了一些衰减之后还是处于自激的状态,能够有什么办法可以防止和解决运放的自激问题