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Analog circuits miscellaneous

  1. In the single-stage transistor amplifier circuit shown in the given figure, if capacitor CE is removed, then, ac small-signal midband voltage gain of the amplifier

    1. increases
    2. decreases
    3. is unaffected
    4. drops to zero
Correct Option: B


With CE, voltage gain

Aυ = -
-hfeRL
hie + (1 + hfe)RE

If RE by passed with capacitor CE, AV will increase Hence, after removing CE mid band voltage gain decreases.



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