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Q#1 BJT GATE EE 1991 MSQ +2 marks -0 marks

Figure shows a common emitter amplifier

(a) Simplify the circuit by applying Thevenin’s theorem to the biasing network  at the base of the transistor

(b) Assuming  to be a short for the frequency range considered. Draw the small signal a.c. model of the circuit obtained in (a) by using the simple model for the transistor shown in figure.

(c) Evaluate the small signal gain of the amplifier.

Small signal a.c. model
C:\Users\Ankit\Dropbox\GATE papers\EE papers\Solutions\Analog Electronics\5 marks question\1991\Q19(b)_3.png

   

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