Question

1. (a) Prove that if the voltage across a resistor RL is a sine wave with amplitude Vcc, then the average power dissipated during one cycle is given by Vc/2RL (b) A Class B BJT output stage is shown in Fig. 1. Assume that Vout (t)-Vcc sinwt; Voc >> VCE(sat); and ß - oo. Also ignore any crossover distortion effects due to the deadband in the voltage transfer characteristic. Sketch the waveforms for Ici (t), Ic2(t), and IL(t) (c) Find PL, Ptotal, and the power efficiency. Cl Q1 in out Q2 C2 Figure 1

Answer 1

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