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2、EV74.UCEV bec cec de 2.4PNN2.4nb0 1 2 N )(xnp 0 b n 1 x x O a PN N )(xnp 0 b n 1 x x O b PN 7V N N N 3 N )(xnp 0 b n 1 x x O c PN 2.4 N )(xnp 0 b n 1 x x O d PN 1PNN )(0 1 xxxP 0 b n 1(a)(b)(c) (d) 2(a)(b)(c)d 2.5C o 2580V65 . 0 )(onBE UV10 CBO IpA C o 70 )(onBE U CBO I 11698)2570(80)01 . 0 005 . 0
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5、246k RC 2.8k T (b) RB1 30k RC 1.8k T RB2 10k RE 1k UCC(12V) 2.8 C o mA. . R UU I B onBECC BQ 0460 246 6012 mA.II BQCQ 2.32046050 5.52.82.3212 CCQCCCEQ RIUU C o 5 .67)2055(%15050 mAII BQCQ 3.1050.04667.5 306V38V2105312V.RIUU CCQCCCEQ CQ I %. . I I CQ CQ 833 322 3221053 246246 6012012. . 0050050 (b( k
6、 RE ER 1k1k mA0 0. . mA2.32462.32 1 CQC RIRC Q Q 6 C o 15(V)618109212 mA092 15057 603 k571030 3(V)12 1030 10 21 21 2 .).(.RRIUU )(. /. . R/R UU I )(./RRR U RR R U ECCQCCCEQ EB BE(on)BB CQ BBB CC BB B BB C o VRRIUU mA. ./. . R/R UU I ECCQCCCEQ EB BE(on)BB CQ 95511816212 162 157657 603 CQ I (%). . I I
7、 CQ CQ 33 092 092162 2.92.9100UBE0.3V (1)ICQUCEQ (2)RB1RB2,UC (3)RB2ICQ2mARB1 2.9 R RB B2 2 U UBEBEU U0 , ICQI2 2mAmA 7 V RRIUUU mA R U I VU RR R U CECQCCECQCEQ E RB CQ CC BB B RB 4 . 5)23 . 1 (212 ( 2 3 . 1 3 . 09 . 23 . 0 9 . 212 1547 15 ) 1 ( ) 2 21 2 2 2RB1I3Q=0,UC=0. RB2 KR mA RRR UU I R VR RR
8、UU U II mA RR UU I mA RR U I B BEB BECC CQ B C EC satCBCC C satBB CE satCECC satB EB CC B 454 2 3 . 1101 3 . 012 100 )1 ( )3( 1 . 72 3 . 12 3 . 012 035 . 0 100)23 . 1 ( 3 . 012 )( 066 . 0 3 . 110147 3 . 012 )1 ( 3 . 0 1 11 2 )( )( )( )( 1 2.10- 55125 C o 1mA15mA . 1 Ic6VU5V CE 5k . 1 RC12VUCCBJT C55
9、T o 6088V . 0 UBEC125T150 48V . 0 UBE (1) E RC55T C I1mAUCE C R E R5k11mA12V6V. RRIUU ECCQCCCEQ 5k . 4 RE RCUCC ECQE RIU 4VU 3 1 RI CCECQ )k(4 1 4 RE 15m. 1 15m . 1 c C55 C55o o mAmA2 2 3 . 1 AU5V5V 6060 8 B R EB BE(on) BB CQ RR UU I CT55CT125 4.5k60R V880 1 B .U mA BB CT55 4.5k150R V480 151 B .U mA
10、. BB CT125 k.UBB32RV,95 B EB R)105(R 45k10RR EB )(.V136541880 60 45 UBBT=125C o mA)(177 . 1 5 . 415045 48 . 0 13 . 6 ICQmAICQ15 . 1 B R 1B R 2B R kkR RR R R kk . R U U R B BB B B B BB CC B 6332 3265 65 6532 95 12 1 1 2 1 C o CE U 1V5V5451151-V12 RRIUU ECCQCCCE 2.112.11UBE (1) (2) R R R R U U U U B B
11、BBB U CCCC 2 2 1 105(105( )(.)(. mA R RRRR R R B B RR R B B B 32 95 9 . 1212 1 C 9 2.112.12 CBQCCCEQ BQCQ CB BECC BQ BEBBQCBQCC RIUU II RR UU I URIRIU )1 ( )1 ( )1 () 1 ( (2)ICQ CQBCRCCQ IIUUI ICQICQ 2.122.1250,UBE0.2V 1UBQ=0,RB 2REICQUCEQ 3REICQUCEQ 1 B U =0 UEE 0, ,R RB B RE EI ICQU UCEQ CEQU U U
12、I ICQ CQI I IU U = 10 V).RIU(U mA . RE ,U II R)( VUU mAII mA. . R)(R UUU I )( k I RIU R R I RIU mA . R UU I CCQCCCEQ EE EQCQ B ECQCEQ BQCQ CB BECCEE BQ E CECC B B E CECC E BEEE E 21120111220 1 12 201220 0U3 052219511212 951039050 0390 151561 201212 1 2 56151 1 1112 1 1 1 12 2012 B 2.132.13ui 1uiuBE
13、B i C iuCE 2PNPUCC1 UCC RBRC C2 RL C1 ui + + uo 2.13 uCE CE CC R u ui + + 11 ui 0t UBEQ 0 t uBE IBQ 0 t iB ICQ 0 t iC UCEQ 0 t uCE 2.13(a) vi 0t uBE 0 UBEQ iB 0 IBQ t t iC 0 ICQ t uCE 0 UCEQ t 2.13(c) 2PNPUCC2.13c ICQ CQ 2.13(c).13(c) 2.132 12 2.142.14 UCC RB RC C2 RE C1 ui + + uo T CE CB (a) UCC RB
14、 C2 RE C1 ui + + vo T (b) (c) UCC RB RC C2 RC C1 ui + + uo T UCC RC C2 RE C1 ui + T (d) RB RE uo ui (e)(f) 2.14 B C ui ui c) ) R C C u ui i + 13 (c)RBb (e)ebUcc RB (f) 2.152.15 2.15 : 14 2.162.16a2.16b 12 CC UV300 B Rk3 C Rk RS C1 RB RCC2 T RL + + uo us (a) (b) 2.16 UCC iB/A 0 1 2 3 4 5 246810 12 60
15、A 20A 40A 80A iB=100A uCE/V D C Q UCEQ ICQ : CCCCCE RIUUcCD: A R .U I B CC BQ 38 70 ,bIB=38uAQ CEQ U CQ I (a)(a) 2.162 u uo o /A A 3 4 4 5 C C C 15 2.172.17aQ1 2.17b Q Q2 2.17c Q Q C1 RB RCC2 T RL + uo (a) + ui UCC 0 uCE (b) ic Q Q Q UCC0 uCE (c) ic Q QQ UCC 2.17 1 CC U B R BQ I C R2.13b Q C R Q C R
16、 Q 2 C R2.13c Q CC U B R Q CC U B R Q 2.182.18ab0 )(onBE U 1 ce r 22.18b 32.18a2 L Rk2 4kkRRR LC L2/2/ Uom B RUom= B R? B R R CE 0 0 Q 16 C1 RB500 k RC 2k C2 T + uo (a) CE RE 1k (b) 2.18 2468 1012 2 1 3 4 5 6 10A 20A 30A 40A 50A 60A uCE/V iCE/mA Q Q 0 ui + 1100,r ,U ceA 220 100500 12 1 EB )on(BECC BQ R)(R UU IA CECCCCCE I)RR(IUU312 VU,I;mAI ,U CECCCE 120402.18b Q(6 CEQ UV2 CQ ImA 2 11 C R 2.18b 32.14 b 1 1 / 1 LC RR 2.18b 4 om U2.18bLR=1k Q
