Vi2 Vi1 HIHI Hi R2 www www R1 VA İR4 R4 www Vcc + Vee R3 [mA] io [V] For the difference amplifier shown in the the values of the components used in the circuit are as follows: Vi14.07 [V], V₁2 8.87 [V], Vref= -0.9 [V], Vcc=+50 [V], Vee-50 [V], R₁ = 16882 [N], R₂ = 16882 [N], R3 = 26008 [2], R4 = 26008[2]. Calculate: the output voltage of the Op-Amp Vo: the voltage at the point A VA: the output current io: the current passing through R4 İR4: the current supplied by the power supply V.₁ İ1= Vref [V] Vo [mA] [mA]

Q1. Assume that Op-Amp as shown above is ideal. Given that R1 is 0.29 Ohm, R2 is 1.7 Ohm, R3 is 2.03 Ohm, R4 is 2.125 Ohm. Calculate Vo, V2 & I3.

4) Below is the small signal model of a multistage amplifier. Using this model, write the equationsthat you would need to determine the voltagegain. IMPORTANT: You only need to providethe equations that you would need to determinethe voltage gain. You DO NOT need to combine and simplify the equationsto determine a final expression for the voltagegain. Vin Vo Vb vo1 Rb R13 Vbe1 Vbe2 'e gm 1 Vbe1 gm 2 Vbe2 Rc2 Rc1 Re