Q. 34

Consider the circuit arrangement shown in Fig 14.16 (a) for studying input and output characteristics of n-p-n transistor in CE configuration.



Select the values of RB and RC for a transistor whose VBE = 0.7 V, so that the transistor is operating at point Q as shown in the characteristics shown in Fig. 14.16 (b).



Given that the input impedance of the transistor is very small and VCC = VBB = 16 V, also find the voltage gain and power gain of circuit making appropriate assumptions.

Answer :

Circuit Diagram:



Using KVL at loop1,




Putting the value from the curve,




Using KVL in loop2,




Putting the values from the curve,




The voltage gain will be,




The power gain will be




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