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3. (20 points) A BJT class B output stage powered by ±15V de voltage sources

drives an 892 load with a 4V peak sinusoid at 1 kHz. Ignore the effect of crossover

distortion for the amplifier.

a) Find the power delivered to the load.

b) Estimate the power dissipated in the transistors of the output stage.

c) Find the efficiency of this amplifier.

vs

Rs VIN

Vcc

Q₁

Q₂

-VEE

VOUT

Load

İL

+

VL

Fig: 1