Question

Build the VDB and CE amps using MultiSim. Show your list of gains and V's. Also, how consistent are the Q points

If you want a stable Q point, you will have to use either vokage-civider bias or two supply emitter bias. With either of these stable biasing methods, the effects of hit varia- tions are virtually eliminated. Voltage-civider bias requires only a single power supply. This type of bias is also called universal bias, an indication of its popularity. When two supplies are available, two-supply emitter bias can provide as stable a Q point as voltage-divider bias. In this experiment, you will connect both types of bias and verify the stable 0 points discussed in your textbook. In this modification of the above experiment - you will make a VDB amp and a simple CE amp. How consistent are the points? [Change transistor gains again] 10 V R 102 391 2N3904 22 8.22 รวาร์ -10 V Figure 19-1 Figure 19-2

Answer 1

VCC 10V R1 1050 R4 3.90 PR1 (de): 1.15 mA Multimeter-XMM1 X XMMI 4.346 V Q1 A V S2 dB R2 + R3 1kΩ Set... 32.260

10V VCC R4 3.9k A PR1 I(dc): - XMM1 Q1 2N3904 R2 2.2k R3 >8.2k VEE -10V

for Fig.19.1. vcea B I cQ E loo 4.6 1,IMA 200 4.56 ). Ima ilima 3) 30o 4:54 4.53 1:11mA 400 4) lilim A. 4.529 5oo 5) so point armast ire: Vee & Tea cise equal of. vosorion is negligible as it is very coith. chonge in ß. so g point is almost constant less for Fig. 19.2 VER Jeg 100 6:34 1.12mA. 2) 200 6.30 T. 1oMA 6.29 3) 1:13 mA 5 ) hoo 6.28 1:13 mů. Here point changes. (more rosiation) a point varies with ß. so