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Electronic Devices & CircuitsBJT Amplifiers

In the hybrid-pi small-signal BJT model, transconductance gm is approximately?

  • AIC/VT
  • BVT/IC
  • Cbeta/IC
  • DIC times VT
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Correct Answer: A. IC/VT
Explanation: At a given bias point, BJT transconductance is gm=IC/VT, where VT is the thermal voltage.
Reference: Standard analog electronics: BJT transconductance
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