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Consider a Class A power amplifier circuit shown in Figure Q.1. Given that β = 120, VBE = 0.7 V, IBQ = 5.3 mA and vce,sat = 0.5 V. Figure Q. 1: Class A power amplifier (a) Sketch with complete labelling the DC and AC load lines. (12 marks) (b) Determine maximum output peak voltage, voutp, without distortion. (4 marks) (c) Calculate the efficiency of the power amplifier at condition of maximum voutp. (4 marks) (d) Examine the expected change in the AC load line when RL value increases. Describe how it affect the maximum output voltage swing. (3 marks)

Consider a Class A power amplifier circuit shown in Figure Q.1. Given that β = 120, VBE = 0.7 V, IBQ = 5.3 mA and vce,sat = 0.5 V. Figure Q. 1: Class A power amplifier (a) Sketch with complete labelling the DC and AC load lines. (12 marks) (b) Determine maximum output peak voltage, voutp, without distortion. (4 marks) (c) Calculate the efficiency of the power amplifier at condition of maximum voutp. (4 marks) (d) Examine the expected change in the AC load line when RL value increases. Describe how it affect the maximum output voltage swing. (3 marks)

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Consider a Class A power amplifier circuit shown in Figure Q.1. Given that β = 120 , V B E = 0.7 V , I B Q = 5.3 m A and v c 0 , 2 a t = 0.5 V . Figure Q.1: Class A power amplifier (a) Sketch with complete labelling the DC and AC load lines. (12 marks) (b) Determine maximum output peak voltage, voutp, without distortion. (4 marks) (c) Calculate the efficiency of the power amplifier at condition of maximum voutp. (4 marks) (d) Examine the expected change in the A C load line when R L value increases. Describe how it affect the maximum output voltage swing. (3 marks)

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