44 w Vo Question 3 (4 Marks): Figure 2: Two stage Amplifier Circuit According the Wien-bridge oscillator presented in Figure3: a) Determine the voltage gain (Av) b) Determine the frequency of oscillation (f) c) give the expression of balance condition C2 A V₁ V₂ Amplifier R1 Figure 3: Wien-bridge oscillator with amplifier = If R1 R2, C₁ =0.1 uF, C₂ = 0.22 uF, and R4 = 10kQ. R3 R w Vo + ww H R2 C2 R₁ Figure 1: Wien bridge oscillator circuit - Determine the value of resistances R1, R2, and R3 for the circuit to have stable oscillations at f= 500 Hz. Question 2 (3 Marks): a) Determine the output voltage V, for the following circuit of Figure 2 b) Determine the type of the amplifier circuit