【简答题】共发射极基本放大电路如图 1 所示。计已知三极管的β =100 , U CC =12V , R B =500k Ω, R C =3k Ω, R L =6k Ω,算 ( 1 )静态工作点 Q ; ( 2 )计算电压放大倍数 ,输入电阻 R i ,输出电阻 R o ; ( 3 )求放大电路不接负载时的电压放大倍数。 图 1
【单选题】Choose the correct answer to replace the underlined words. Our answer will be threatened by one natural disaster after another if we don't act now.