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Analog circuits miscellaneous

  1. In the circuit shown in the given figure, assuming that the capacitor C is almost shorted for the frequency range of interest of the input signal, voltage gain of the amplifier will be approximately __________ .
    1. 1
    2. 2
    3. 3
    4. 4
Correct Option: A

Av =
AI RL
=
(1 + hfe) RL
RiRi

=
(1 + hfe) RL
=
100 × 0.66 K
= 66
hie1 K

Avs =
AV . Ri
= 66 ×
1
= 0.985 ≈ 1
Ri + Rs66 + 1



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