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关于运算放大器电路放大倍数的问题

Other Parts Discussed in Thread: OP07, OP07C, OPA277

正在使用OP07做两级放大电路。两级共放大100倍,正负5V供电。但是输入信号大于5mv时就出现了饱和。请问出现饱和失真是为什么?是因为OP07芯片本身对放大倍数有限制吗?不是很清楚出现运放饱和的原因,它和运放本身哪些参数有关呢?