静态工作点:U(BQ)=Rb2/(Rb1+Rb2) X12V =4V
I(CQ)约=I(EQ)={U(BQ)—0.7}/R(e) =1.65mA
U(CEQ)=12V—I(CQ){Rc+Re} =5.4V
交流通路:r(be)= r(bb) + (1+β)*13 = 863欧
Au=-β*RL/r(be)=-231
Rin=Rb1//Rb2//r(be) =6.7K
Rout=Rc=4K
静态工作点:U(BQ)=Rb2/(Rb1+Rb2) X12V =4V
I(CQ)约=I(EQ)={U(BQ)—0.7}/R(e) =1.65mA
U(CEQ)=12V—I(CQ){Rc+Re} =5.4V
交流通路:r(be)= r(bb) + (1+β)*13 = 863欧
Au=-β*RL/r(be)=-231
Rin=Rb1//Rb2//r(be) =6.7K
Rout=Rc=4K