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Analog electronics circuits miscellaneous

Analog Electronic Circuits

  1. A CE amplifier has an unbypassed RE Given RC (collector load) is 10 k ohms, RE = 1 k ohms, rπ = 500 ohms, hfe = 100. The voltage gain | Av | is approximated by:
    1. 2000
    2. 1000
    3. 20
    4. 10
Correct Option: D

Given that Rc = 10 kΩ
RE = 1 kΩ
rπ = 500 Ω
hfe = β = 100
| AV |=?

| AV | =
β·Rc
rπ + (1 + β)RE

=
100 × 10 × 103
≈ 10
500 + (1 + 100)103



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