2024年11月21日

射极耦合双稳态电路

2003 年 11 月 19 日
 

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?¨1?????óRc1???????????????????ò?÷??Rc1/?¨R1+R2????±?????±????????????????????? ?¨2??????2?¨C?????·????RE1????UP1???????????????????????ò????2?¨d?????·????RE2??????Ic2??????????Up2??????????????????????·?·¨?á?÷????·???×÷????????·?×???????????RE1?òRE2????????????????????±????????°?ì?? ??1?????????????????· ??2?????????°?ì ?????????????????????·???è?? ?????????????????·???è·¨????±í?? <
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???? ?????ó???¤×÷?????ò?????????°?????????? ?ò???ó?????????°????????????????3DK2????min=30 ?·?¨RC?? ???á?????¨?????§???????¤×÷??±???×??????òIc?? Ic=[(1/3)-(1/2)]Icm Rc=(Ec-Uomin)/Ic ?????????????·???÷???????¤×÷???¨???????? Ic=1/3Icm=1/3??30=10mA Ec???????????¨????????12V???è????×???????Uomin=3V ?àRc=(12-3)/(10??10)=900?? ????RB??RK ????BG2??????±?????RB?????????ó???¨????IRB=?¨0.2-1)I ??????????????????BG2???¨?±?????¤×÷??????·??ó????????IRB=?¨5-10)Ib2 Ib2min=Ic2/??min,??2Ib2min???????ù?????÷???ù???????? RB=(UE2+Ubes)/IRB?°Rk=[(EC-Ube)/(IRB+Ib2)]-RC ?÷???????¤×÷???¨??????BG2?¤×÷??±???×?????????IRB=0.5Ib2 Ib2min=10/30=0.33mA,Ib2=2??0.33=0.66mA IR=0.5??0.66=0.33mA RB=(UE2+Ubes)/IRb=(2.7+0.7)/0.33=10.3k ????RB=12k ?àRk=[(12-3.4)/(0.33+0.66)]-1=7.7k ????Rk=7.5K ????R1??R2 ???????????÷????·??????ó???
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