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Question
Draw the circuit for studying the input and output characteristics of and transistor in CE configuration. Show, how, from the output characteristics, the information about the current amplification factor (βac) can obtained.
Solution
Current amplification factor (βac) is the ratio of change in collector current (ΔIC) to the change is base current (Δ IB) at constant collector voltage. i.e.
`beta_(ac) =(DeltaI_c)/(DeltaI_B) | v_(CE)` constant
Output characteristics represent the variation of IC with VC, keeping IB constant.
From above graph at VC = V, the value of collector current increase with the increase the base current IB.
Thus,
`beta_(ac) = (DeltaI_c)/(DeltaI_B) |v_(CE)` constant AC Current gain
RELATED QUESTIONS
Draw a plot of the transfer characteristics (V0 versus Vi) for a base-biased transistor in CE configuration. Show for which regions in the plot, the transistor can operate as a switch ?
Draw the circuit arrangement for studying the output characteristics of n-p-n transistor in CE configuration. Explain how the output characteristics are obtained.
