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Academics – Electro-Technology : 2018/MAR/09
Question

Q9) A transistor with the characteristics shown on Worksheet Q9 is used in a common emitter amplifier circuit with a 14 V d.c. supply and a 2 k  resistive load. The base bias current is 80 mA for a sinusoidal input signal current of 60 mA.

(a) Draw the load line on Worksheet Q9. (2)

(b) Determine the values of collector d.c. voltage and current. (4)

(c) Determine the R.M.S. values of EACH of the following:

(i) the a.c. load current; (4)

(ii) the a.c. output voltage. (4)

(d) Calculate the a.c. signal current gain of the amplifier. (2)

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