An n- channel JFET has IDSS=2mA,and Vp=-4v.Its transconductance gm=in mA/V)for an applied gate to source voltage VGS=-2v is___________?
Correct answer: B. 0.5
- A. 0.25
- B. 0.5
- C. 0.75
- D. 1
Explanation
Using the Shockley relation, the factor is 1 - VGS/Vp = 1 - (-2/-4) = 0.5. Since gm0 = 2IDSS/|Vp| = 1 mA/V, gm = 1 × 0.5 = 0.5 mA/V.
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