3 (a) R₁ +12 V Ry Cs L 000 20μH C₁ Ca 0.1 F Figure Q3.1 ر 0.01 CA out (50%) (b) (1) € (ii) Determine the frequency for the oscillator in Figure Q3.1. Assume that there is negligible loading on the feedback circuit and that its Q is greater than 10. (30%) (20%) Find the frequency if the oscillator is loaded to a point where the Q drops to 8. R₁ ww C₁ C₂ oVou 0.001 F 0.001 F 0.001 F R₁ 10 ΚΩ R₂ R 10 ΚΩ · 10 ΚΩ Figure Q3.2 Determine the value of Rr necessary for the circuit in (1) Figure Q3.2 to operate as an oscillator. (ii) Determine the frequency of oscillation (25%) (25%)