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Output characteristics of an n-p-n trans...

Output characteristics of an n-p-n transistor in CE configuration is shown in the Fig. Determine

(i) dynamic output resistance (ii) dc current gain and (iii) ac current gain at an opererating point `V_(CE)=10V`, when `I_(B)=30muA`.

Text Solution

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(i) The output resistance `=(Delta V_(CR))/( Delta 1C)`
(ii) The dc current gain `beta = (I_(c ))/( I_(b))`
The ac current gain `= beta_(ac) = (DeltaI_(c) )/( Delta I_(c )) = ((4-3)/( 40-30)) `
`=(10^(-3))/( 10 xx 10^(8)) = 100`
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