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Find the maximum value of gm for FET with IDSS=10mA, Vp=-2V, VGS=5V?

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Find the maximum value of gm for FET with IDSS=10mA, Vp=-2V, VGS=5V?

(a) 10mS

(b) 20mS

(c) 1mS

(d) 0

This question was posed to me during an interview for a job.

My doubt is from The FET Small-Signal Model topic in portion Field-Effect Transistors of Electronic Devices & Circuits

1 Answer

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The correct choice is (a) 10mS

Explanation: gm0=2IDSS/|Vp|                                                                                                                                  gm0=2×10mA/2V                                                                                                                                                               gm0=10mS.

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