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Question : 21
Total: 26
Draw the typical input and output characteristics of an n − p − n transistor in CE configuration. Show how these characteristics can be used to determine (a) the input resistance ( η ) , and (b) current amplification factor ( β ) .
Solution:
Input and Output characteristics
Determination of
(a) Input resistance
(b) Current amplification factor
The input and output characteristics, ofn − p − n transistor, in its CE configuration, are as shown.
(a) Typical input characteristics Input resistance
r i = (
) V CE
(b) Typical output characteristics
The relevant values can be read from the input characteristics.
(b) Current amplification factor
β = (
)
The relevant values can be read from the output characteristics, corresponding to a given value ofV C E .
Determination of
(a) Input resistance
(b) Current amplification factor
The input and output characteristics, of
(a) Typical input characteristics Input resistance
(b) Typical output characteristics
The relevant values can be read from the input characteristics.
(b) Current amplification factor
The relevant values can be read from the output characteristics, corresponding to a given value of
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