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RSrbe1Rb1?=100?rbe1=5.3k?Uo?UiRi1?RE1Rb21Rb22rbe2?I?RC2RL?1I2b2b1Ri2③当RS=20k?时，如果去掉射极输出器，则Ri?Ri2?4.86k?Au?Au2??193.5RiAus?Au??37.8Ri?RSrbe2=6.2k?VCC=12VRS=20k?RE1=7.5k?RC2=12k?RE2=5.1k?Ri=252k?Ri2=4.86k?习题2-26Rb11C11P110Rc1C12VT1Rb2VT2Re2C22+VCC?=100rbe1=6.2k?rbe2=1.6k?VCC=12VRb11=91k?Rb12=30k?Rc1=12k?Re1=5.1k?Rb2=180k?Re2=3.6k?RL=3.6k??Rb12UiRe1Ce1?URLo微变等效电路：rbe2?Ui?Uo?RRb2?I?RRLRb11Rb12rbe1?I1b1c12b2e2可编辑范本
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?rbe1=6.2k?Uo?rbe2=1.6k?UiRb11=91k??RRb2?IRb11Rb12rbe1?I?Re2RL1b1c12b2Rb12=30k?Ri1Ri2Rc1=12k?①Ri?Ri1?Rb11//Rb12//rbe1?4.86k?Re1=5.1k?Ri2?Rb2//[rbe2?(1??)(Re2//RL)]?90.8k?R=180k?b2rbe2?(Rc1//Rb2)Re2=3.6k?Ro?//Re2?122?RL=3.6k?1??②RL=∞时，Ri2?Rb2//[rbe2?(1??)Re2]?120.6k?Au1??[?(Rc1//Ri2)]/rbe1??176(1??)Re2Au2??0.996?Au?Au1?Au2??175.3rbe2?(1??)Re2rbe2?=100rbe1=6.2k??Uo?rbe2=1.6k?UiRb11=91k??Rc1Rb2?IRb11Rb12rbe1?IR?Re2L1b12b2Rb12=30k?Ri1Ri2Rc1=12k?RL= 3.6k?时，Re1=5.1k?Ri2?Rb2//[rbe2?(1??)?Re2//RL?]?90.8k?R=180k?b2Re2=3.6k?Au1??[?(Rc1//Ri2)]/rbe1??171RL=3.6k?(1??)?Re2//RL?Au2??0.991rbe2?(1??)?Re2//RL?rbe2?=100?AuL?Au1?Au2??169.5AuL?96.7%Au可编辑范本
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?rbe1=6.2k?Uo?rbe2=1.6k?UiRb11=91k??RRb2?IRb11Rb12rbe1?I?Re2RL1b1c12b2Rb12=30k?Ri1Ri2Rc1=12k?③如果去掉射极输出器，则Re1=5.1k??Rc1Rb2=180k???193.55RL=∞时，Au??Re2=3.6k?rbe1RL=3.6k?R=3.6k?时，Lrbe2?=100AuL????Rc1//RL?rbe1??44.67AuL?23.1%Au习题2-27P110答：①测静态工作点Q ：直流稳压电源、万用表(直流电压档)②测电压放大倍数Au ：直流稳压电源、正弦波信号发生器、示波器、交流毫伏表。③测最大输出电压幅度Uom：同②④测输入电阻Ri：同②⑤测输出电阻Ro ：同②习题2-28P111本题为实验题，略
可编辑范本
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可编辑范本