Question

1. Set up the circuit of Figure 1. Notice that the voltage probes have been renamed VB and VE, and the display has been customized to only show V(dc). You can do this by double-clicking the display and selecting the parameters tab. VCC 20.0V RB 470KO VB Q2 2N4124 Vide- Vide) VE RE $2.20 FIGURE 1: EMITTER FOLLOWER AMPLIFIER TECH 150 - Electronic Devices and Circuits Lab 10 - The Emitter Follower Amplifier - using Multisim 2. Calculate the theoretical de voltage values of V, and Ve, as well as measure the voltages using the voltage probes in your Multisim circuit. In each case, from Ve determine le. LV/RE V: volts Ve volts IE ma MEASURED CALCULATED I

Answer 1

Griven specification of uncompensated system - Vec 220V C RB 4 roka B E RE 2.2 kr Apply KVL in B- E junction I E RE = 0 + VBE Viet IBRB JE I Btic IB + 10 ols IE 101 IB IE UBE 0.7V + 101 X 2.2 18:0 .:.0.7–20 + 47078 20-0.7 IB 6 9 2.2 ТВ 0.0 278 9 mA UB Vcc - IBRB 0.02789 X 470 20 VB VB - 6.09 Sv and VE JERE VE - 1B (+) XRE 0.02739 X Cl +100) x 22 VE 6.197V VE Ut It = RE .'. 6.197 IE 22 2.816MA IE V1 20V R1 3 470k2 PR1 V 6.9637V V 2 Q1 V 6.1631V PR | 2.8014mA VA R2 2.2k92 0

	VB(V)	VE(V)	IE(mA)
Measured	6.9637	6.1631	2.8014
Calculated	6.895	6.197	2.816