Question

Q3: The transistors in figure below have the following parameter values [ Q1: re = 12 ohm, beta = 200, ro = 2 Mohm] and [Q1: re = 10 ohm, beta = 100, ro = infinite] .. Draw the complete ac equivalent model of the amplifier then calculate Avnl, Avi, Avs, *.and Ai +30 V O 33 k3 10 ka 4.7 kn 0.3 AF 2 F 가 0 400 16 0.15 F 10 kn 10 ko 3.3 kn 3 10 ko 48 F RL - 20 kn

Answer 1

-> liven COMMOn-Emitter common collectors Multistage CE; Q: 80-191 B=200 80 = 8x10²4 %o infinite Cc: Q 8e=lor B-100 Qe - equivalent Model Rsig = 4ood С. Bite BIB BIL Rooi Ug R3 Yout Roi lounll 33 Kn Ros loan luotki - 10x33 x103 रे 43 10x Uo7x10 14.7 Ro = 70674 ku IRB = 3,197 km

AUNL= AU, XAUL Bide 200x12 quoo Bore = 2.uku Yo=QMN Ra - lokh Bares = 100x10 103 = 1ku REG loka R = 20kn. for Avi IB - BIB BIB dor & Ring out letos Vout, AV. AVANCO Vout, : - B1,[olle,lleylere, luon - IoBire

a for Reni nor BT vo Ring- Iba La La we RE (Lut Bry] vo. = I beg Arde al bg (1+B] RE Iba [Bre+ (1+Bg] PE Ride +(148) RE Reng 드 Iba Ring = Beret (1+ B2] RE = 1kn + [101Jx 10 kd lkd + 10loka Ring = loll ka 9 AUG LANA VOR

> 1o ܕܘܠܗ܀ ܟ݂ܠܰܢ܀ vena RE PR Vog Tes[lto) A UNL Noa ving Vog= ((+B) IBRE vin = Ig Batat (ABIRE AVONL= If g {1+B) RE Jag [Bregt (149) RC] 3 Avg Nya [143] RE [100x10x10 Ring loll kn 3 = 101x10x10 loll kn AV₂ N2 = 0.999 YN

Voz vina Avg -BIA Coll Rell Pall Ring] Avg with Load Voz = [(+B] I Bg (Rellre upra = Io [Bre + (1+B3 Re] [148] [RE 11 R Bre+(1+B] RE 101x [loknll 20 ku] Avg 101860667x1013 loll XO3 Ava > If Bire Av, a -froll Rell Reell Rina loll ku Ava 0.666 / with load Re Nouti ANG = ven re

Av: -[2110 11 10X10°|| 3.197X10° / 1011103J 11 12 AV, - - [671537.69511) 104|| 3194] 12 Av, ; - [9853. 272911 3197] 12 Any = - [9413.81961] 12 AV, = - 201015) V » ANNE AV, XAV2 NL -F901.151] x 0.999 AND = -200.919 27 Avload Av, X AVAL [201.151] x [0-6661) = -134.1177 , .

Avload = ~134. 1677. / » Avg - Ang TAVOL 0 from 05 fig. Vin Vg [rall Bre, Resig + (Reill Bre Yig a ven (Roigt (Roj/1 866)] {P.6, 11 Bre, Vol ANS Vg Bly [roll Rell Roal Ring weh [Rsigt Rall Bre, [Roll Bre] Als, a Av, x[Rel/B8e1] Rsig + (PB, l1 Bre,

Alby 201-151]x (674X18//2.4.100 400+ [106744109 |) 2.4 x103 [201.151) x (1828.9311] Aug, 400 + 1898.231) AVS, - [-201.1518 x 0.82018 Avs, 3-165.001 % - AV = Avs, XAVLa [115.0u1] *0.667 AVG = -110.0826

151 (Toute Ten Igi for stage current gain is B, 200 (CE) -B,16 → for and stage current gain is Pout: ((+B) Iz =(1+B) Ipe B, Iana Az = AX AIR X ---3, x[178] --800x[1+100) --200x 10) Ag =-20200 /

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