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Electronic Devices & CircuitsFET & MOSFET

For a JFET, transconductance gm represents the small-signal ratio of change in?

  • ADrain current to gate-source voltage
  • BGate current to drain-source voltage
  • CDrain voltage to source current
  • DGate voltage to gate current only
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Correct Answer: A. Drain current to gate-source voltage
Explanation: JFET transconductance is gm = dID/dVGS at the operating point, describing how effectively gate voltage controls drain current.
Reference: Standard electronics: FET transconductance
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