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Physical electronics devices and ics miscellaneous

Physical Electronics Devices and ICs

  1. In the common emitter amplifier with RL = 4000Ω, given hfe = 100, hoe =
    1
    , hie = 1000, the current gain | AI | is given by—
    36 × 103
    1. 400
    2. 25
    3. 90
    4. 100
Correct Option: C

In the common amplifier, the current gain is given by

|AI | =
–hfe
=
100
100

1 + hoe · RL1 + (4000 / 36 × 103)1 + (1 / 9)

or |AI | = 90
Hence alternative (C) is the correct answer.



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