For a class B amplifier providing a 20 V peak signal to

For a class B amplifier providing a 20 V peak signal to 16Ω load and a power supply of V_cc = 30 V, efficiency will be _____ % .

I_dc =	2	× I_L =	2	×	V_L	=	2	×		20
	π		π		R_L		π			10

= 1.25 A ×	2	= 0.796 A
	π

P_dc = V_CC × I _dc = (30) × (0.796) = 23.9 W
Power delivered to the load,

P₀ =	V_L²	=	(20)²	= 12.5 W
	2 R_L		2 × 16

% efficiency, η =	P₀	× 100 =	12.5	× 100 = 52.3%
	P_dc		23.9