Modern Physics 6 Question 8
8. A common emitter amplifier circuit, built using an transistor, is shown in the figure. Its DC current gain is 250 , and . What is the minimum base current for to reach saturation?
(Main 2019, 8 April II)
(a)
(b)
(c)
(d)
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Solution:
- For a common emitter
transistor, DC current gain is
At saturation state,
Hence, saturation base current,