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Analog electronics circuits miscellaneous

Analog Electronic Circuits

Direction: Consider the circuit given below. The transistor parameters are β = 120 and VA = ∞ , VBE = 0.7 V

  1. The small signal voltage gain AV =
    V0
    is:
    VS
    1. – 4.38
    2. 4.38
    3. – 1.88
    4. 1.88
Correct Option: C

AV =
V0
= – gm. Rc.
rπ
VSrπ + RB

= – 24 × 10– 3. 4 × 103
5 × 103
5 × 103 + 250 × 103

= – 120 ×
5
= – 1.88
255



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