D17.9 Using a BJT biased at Ic= 1 mA, design a Colpitts oscillator to operate at a = 106 rad/s. Use C₁ = 0.01 uF and assume that the coil available has a Qof 100 (this can be represented by a resistance in parallel with C₁ given by Q/C₁). Also assume that there is a load resistance at the collector of 2 k2 and that for the BJT, r = 100 k2 Find C₂ and L. Ans. 0.66 µF; 100 μH (a somewhat smaller C₂ would be used to allow oscillations to grow in amplitude)