Transistors. Lesson #10 Chapter 4. BME 372 Electronics I J.Schesser

Transcription

1 Tanssts essn #10 Chapte 4 BM 372 lectncs 154

2 Hmewk Ps. 4.40, 4.42, 4.43, 4.45, 4.46, 4.51, 4.53, 4.54, 4.56 BM 372 lectncs 155

3 Hmewk Answes #20 Ps See fgue 4.33 BM 372 lectncs 156

4 Ps Hmewk Answes #22 g m βv T CQ β V CQ T CQ g m BM 372 lectncs 157

5 Hmewk Answes #23 Ps Cuplng capacts ae ften used n dscete amplfes s that suce and lad d nt hae dc cuents flwng thugh them and s the as pnts n the amplfe ae ndependent f the suces and the lad. We must nt use cuplng capacts f t s necessay t amplfy dc sgnals ecause the cuplng capacts act as pen ccuts f dc. BM 372 lectncs 158

6 Hmewk Answes #24 Ps Fst DC analyss, then AC analyss V BQ 0.7V β 100 V CC 15V 1 10k C S k 2 n 0.001snωt BM 372 lectncs 159

7 Ps DC Analyss Hmewk Answes #25 β 100 V CC 15V V BQ 0.7V 1 10k C S k 2 Theenns equalent at the ase: 4.7 VBth k 10k 3.2k Bth The ase ccut: V V V (1 β ) Bth BQ Bth BQ Q BQ Bth BQ BQ BQ CQ VBth VBQ mA (1 β ) 3.2 k (301)1 k Bth β 3.93mA BQ V V C CC CQ C Q N ACTV GON βvt 661Ω CQ BM 372 lectncs 160

8 Ps AC Analyss S β k Hmewk Answes #26 C β k 2 S Z 661 k ut C 1 β k 4.7k C A Z A n β C B A Z β β β n 0.5k ; A 41.4; G β Z A A n 3132 β A Z n C 151 n 0.001snωt BM 372 lectncs 161

9 Hmewk Answes #27 P 4.46 Hgh mpedance w mpedance cq p A A Zn A G Z BM 372 lectncs 162

10 Hmewk Answes #28 Ps Fst DC analyss, then AC analyss V BQ 0.7 V β 100 V CC 15V 1 10k S n 10k BM 372 lectncs 163

11 V TH n S Hmewk Answes #29 V CC 15V 1 10k V BQ 0.7 V β k è TH V CC 15V β B èv TH V B TH V CC 15V eme the ccut elements whch ae nt affects y the DC ltages Openng the cuplng capacts edaw the ccut and eplace the ase ccut wth ts Thenen s equalent 5k V Next, use the DC equalent ccut f the acte egn and then wte KV f the ase ccut V V TH BQ CQ CQ BQ β V V BM 372 lectncs T TH TH V (1 β ) CC TH BQ TH V 6.42mA; V Q BQ BQ Q 1 8.5V ; 100k CC (1 β ) 7.5V k (1 100) Q BQ V T BQ TH BQ V BQ 64.2µ A 6.48mA (1 β ) 26m µ 164 BQ

12 Hmewk Answes #30 n S V BQ 0.7 V β k 10k 2 β 500 The next step s t pefm the AC analyss y Shtng any DC ltage suces Openng any DC cuent suces Shtng the capacts Cnnectng the suce, suce esstance, and lad esstance eplace the tansst wth ts small sgnal equalent ccut. And edaw t smplfy BM 372 lectncs 165

13 Hmewk Answes #31 n n S k 10k S B Z n 5k e (1β) β β e (1β) 333 O 500 BM 372 lectncs A A Z Z A B t 1 2 (1 100) (1 100) G A B Z A 5k (1 β ) 4.36k ; (1 β ) (1 β ) (1 β ) A t (1 β ) A Z Z

14 BM 372 lectncs 167 Hmewk Answes # ) ( ) (1 1 1 β β Z S S B S 50k β e (1β) Z O x x S ) ) ( ) (1 1 1 ( ) (1 ) ( 833 ) (1 β β β Z S x x S x x x S x B S S x e x x x x

15 Hmewk Answes #33 P 4.53 V CC 15V β 100 V BQ 0.7V B 270k C S s 100 BM 372 lectncs 168

16 Hmewk Answes #34 s P 4.53 S β 100 C β 100 B 270k 100 β Z [ n C ( ( [ c β β (1 β ) ) ) (1 β ) ] (1 β ) ] B BM 372 lectncs 169

17 Hmewk Answes #35 P 4.54 V CC 15V β 100 V BQ 0.7V B 270k C S s 100 BM 372 lectncs 170

18 Hmewk Answes #36 β 100 P 4.54 DC analyss s V BQ 0.7V S B 270k C V CC 15V 100 Base Ccut V V ( ) CC BQ B BQ BQ CQ V ( β ) BQ CQ BQ B BQ BQ BQ BQ V B β VT CC BQ (1 β ) BQ V Cllect Ccut V V CC C CQ B Q V V ( ) C CC CQ B Q BM 372 lectncs 171

19 s Hmewk Answes #37 P 4.54 AC Analyss S β 100 C β 100 B 270k 100 β Z [ n C ( ( [ c β β (1 β ) ) ) (1 β ) ] (1 β ) ] B BM 372 lectncs 172

20 P Hmewk Answes #38 esults BQ CQ Q VCQ p AV Zt Zn V/VS AVS BM 372 lectncs 173

21 Hmewk Answes #39 P 4.56 V CC B 1 e (1β) n C 1 B 2 C 2 n β 2 1 BM 372 lectncs 174

22 Hmewk Answes #40 P 4.56 B f B e (1β) n e (1β) n β 2 1 n β BM 372 lectncs 175

23 n n P 4.56 f B e (1β) β Hmewk Answes #41 mtte nde f e n B nput Mesh (1 β) n ; n n (1 β) n B B (1 β) (1 β) n n Zn n n B B [ B / (1 β) ] [ 1 n / (1 β) 1 ] B B A n 1 / (1 β) 1 B 1 1 B 1 / (1 β) [ B / (1 β)] B / (1 β) / (1 β) B Base nde n n n n f n f A ; n 1 A B / (1 β) B / (1 β) B / (1 β) / (1 β) B n B n B / (1 β) n(1 A ) B ; f n B B n BM 372 lectncs 176