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Home › Analog Electronics › A common-emitter amplifier has an approximate small-signal voltage gain Av = -gmRC. If gm = 40 mS and RC = 2 kOhm, neglecting loading and output resistance, Av is?
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Analog ElectronicsTransistor Amplifiers

A common-emitter amplifier has an approximate small-signal voltage gain Av = -gmRC. If gm = 40 mS and RC = 2 kOhm, neglecting loading and output resistance, Av is?

  • A-8
  • B-20
  • C-80
  • D-800
Report an error
Correct Answer: C. -80
Explanation: Av ≈ -gmRC = -(0.04)(2000) = -80. The negative sign denotes phase inversion.
Reference: Standard analog electronics: transistor amplifiers
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