如图所示的差分放大电路的 V CC = +12V , β 1 = β 2 = 50 , r b1 = r b2 = 2kΩ , I 0 = 1mA 。 ( 1 )静态工作点 ( ); ( ); =( ); ( 2 )差模电压放大倍数( )。 ( 3 )输出共模电压放大倍数( )。
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A.
1NF
B.
2NF
C.
3NF
D.
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