A、确定电压放大倍数Au
B、确定静态工作点Q
C、确定输入电阻<img src="https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/examination/imgUplod/150658741377426969a93f5184dc68cd6119f8e814ec4image5.png">, 输出电阻<img src="https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/examination/imgUplod/1506587413924c1e02439e9ad4de783e24298aa654ce2image6.png">