Question
Question: A common emitter amplifier is designed with NPN transistor (α = 0.99). The input impedance is 1 KΩ a...
A common emitter amplifier is designed with NPN transistor (α = 0.99). The input impedance is 1 KΩ and load is 10 KΩ. The voltage gain will be
A
9.9
B
99
C
990
D
9900
Answer
990
Explanation
Solution
Voltage gain = β × Resistance gain
β=1−αα=(1−0.99)0.99=99
Resistance gain =10310×103=10
⇒ Voltage gain = 99 × 10 = 990.