基本放大电路课件ppt.ppt

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1、N型锗正极引线负极引线外壳金属触丝负极引线正极引线N型硅P型硅铝合金小球底座SiO2正 极 引 线负 极 引 线N型 硅P型 硅iu0 iuIUrddd ) 1(eTSUuIiiu0Riu iuDU+-uiDUDUu DUu ui-+iu-+iuiu0mA1mA1010V0DDDDRUIUmA93. 0mA107 . 010V7 . 0DDDDDRUUIUV88. 0V)91. 02 . 07 . 0(mA91. 0mA2 . 0107 . 010DdonDdonDDDIrUUrRUUImA1 . 0mA101DDDRUImA03. 0mA107 . 01DDDDRUUImA029. 0mA2

2、 . 0107 . 01donDDDrRUUI I E = I EN + I EP 。 NNPBBVCCVRbRCebcIENEPIIEBINNPBBVCCVRbRCebcIENEPIIEBICNICICBOICBOCNCIII BCEIII BCII_基区复合的电流扩散到集电区的电流_BCII_BCEIIIBBBBCEIIIIII)1 (_常数CEUBEBufi)(常数BiCECufi)(+i-uBE+-uBTCE+Ci0.40.2i(V)(uA)BE80400.80.6Bu=0VuCE 1VCEuiCCE(V)(mA)=60uAIBu=0BBII=20uABI=40uAB=80uAI=10

3、0uAIBBCII iCIBIB=0uCE(V)(mA)=20uABI=40uABI=60uABI=80uABI=100uA _BCII_ECII_BCiiECiiBICEui(V)IBC=100uAB=80uA=60uA(mA)IIB=0B=40uA=20uABII+-uo+u+-i放大电路u-R+SSRL信号源负载iiio+-uo+u+-i放大电路u-R+SSRL信号源负载iiio+i-oiii+-信号源S放大电路oS-LuR负载RuuRiRi+S+o负载LS+信号源-u-oiiiRR放大电路-+iuuRiRiouoRRo0,ooosL= uRiuR22 213212AAAADiouUUA

4、uBE = UCCiBRBCCCRV+CTb1CCRbVL+uoR-u+-ib2CcRCLL/RRR +R-uoTuRbRLic+L1RCCCRVioBECEuuuuuAceCECEcCCbBBbeBEBEuUuiIiiIiuUu +i-ube+-ubTce+ci+bucei+-+ibecu-二端口网络CEBBE11eUiuhce12eb11ebeUhIhUce22eb21ecUhhIICEBC21eUiihBCEBE12IeuuhBCEC22IeuihCECEBEBBBEBEBCEduuudiiuduIUCECECBBCCBCEduuidiiidiIU),(CEB1BEuifu ),(CEB

5、2Cuifi CECEBEBBBEBEBCEduuudiiuduIUCECECBBCCBCEduuidiiidiIUbeUbIcIceUCECEBBEBBE11eUUiuiuhBBCEBECEBE12IIeuuuuhCECEBCBC21eUUiiiihBBCECCEC22IIeuiuihce12eb11ebeUhIhUce22eb21ec UhhII+i-ube+-ubTce+ciebbbebbbbbbebe)(1)(1rriririiur+bceberbbrBICIIEber)mA(mV26)(1200EbeIrBBEQCCBQRUUIICQ IBQUCEQ = UCCICQRC uA)be

6、birIUcbccoRIRIUuAiUoUbecrRbeBiii/rRIUR0,ooosL=uRIURcoRR CCB2B1B1BQRRRUUCCB2B1B1BQRRRUUCCB2B1B1BQRRRUUEbeLEbebLbiou)(1)(1RrRRriRiuuAebbebi)1(Ririu )/(LCboRRiu +ebbciRiRRb1berRuoC+-LRi-+ub2RRiicbiiiebebii)(1RriuR b2b1ii/RRRR b2b1ebe/)(1RRRr coRR +ebbciRiRRb1berRuoC+-LRi-+ub2RRiicbiiiCCB2B1B1BQRRRUUbeb

7、irIULbLcoRIRIUbeLiourRUUAcoRR beB2B1iii/rRRIUReEQCCCEQRIVUUCCIBQRBUBEQIEQRE=0EBBEQCCBQ)1 (RRUUIICQ=IBQIEQ bi IIeoII)1 (beioiIIIIA所以所以EbbebEebebi)1 (RIrIRIrIUEbEeo1RIRIU）（EbeEEbbebEbio)1 ()1 ()1 ()1 (RrRRIrIRIUUAuEbebEebebiiiii)1 (RrIRIrIIUIURRi=RB/rbe+(1+) RE ebbIIIIo令令Rs= Rs /RBEosbeosbeooRURrURrUI

8、1/)()1 ()(111sbeEsbeEsbeEEsbeoooRrRRrRRrRRRrIUR2.6.2自举式射极输出器自举式射极输出器Lbbebi)1 (RIrIULbLeo)1 (RIRIU1)1 ()1 ()1 ()1 (LbeLLbbebLbiouRrRRIrIRIUUAbZbezIRrIbZbei)1 (IRrIZbeLbebZbeLbbebiii1)1 ()1 ()1 (RrRrIRrRIrIIUR电路的输出电流为电路的输出电流为ebboIIIILobeobeooRUrUrUIbeLLbeLbebeooo)1 (1111rRRrRrrIURCCB2B1B1BQRRRUU输入电流输入电流 ei IILCCcoRRRIILCCLCCceioiRRRRRRIIIIA当当RCRL时时iAbebirIULbLooRIRIUbeLbbeLbiourRIrRIUUA1)1 (bebbebiiirIrIIURRi=RE/Ri = RE / 1berRo=RC第二章 结束