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Step of 5 12.004E Refer to Figure 11.5 in the text book. (a) Find the output power. Write the expression for the average output power. Substitute 4.5 V for v and for PL 24 20.25 = 8 W Therefore, the output power is 2.531 W W Step of 5 (b) Find the power drawn from each supply. Each supply provides a current waveform of half-sinusoid, thus average power drawn from each supply is, = = π Where, the peak current drawn from each supply is Write the expression for the power drawn from supply. Substitute 4.5 V for and for Therefore, the power drawn from each supply is Step of 5 (c) Find the power efficiency. Determine the total power drawn from supply. =2(2.148) = 4.296 W Write the expression for the power conversion efficiency. n Substitute 2 531 W for and 4.296 W for n 4.296 2.531 x100 58.91% Therefore, the power efficiency nis 58.91% Step of 5 (d) Find peak current supplied by Given The input peak current is Substitute for RL Substitute 4.5 V for and 50 for 4.5 4(1+50) 4.5 204 = 22.05 mA Therefore, the input peak current is 22.05 mA 22.05 mA Step of 5 (e) Find the maximum power dissipation in each transistor. The maximum power dissipation in each transistor is, PDN max = = Substitute 6 V for and 4 for = PDPmax = Therefore, the maximum power dissipated in each transistor is 0.911W

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