InterviewSolution
Saved Bookmarks
| 1. |
In a small signal equivalent model of an FET, What does gm VGSstand for?(a) A pure resistor(b) Voltage controlled current source(c) Current controlled current source(d) Voltage controlled voltage sourceThis question was addressed to me in exam.This question is from The FET Small-Signal Model topic in division Field-Effect Transistors of Electronic Devices & Circuits |
|
Answer» RIGHT answer is (b) Voltage controlled CURRENT source For explanation I would SAY: For FET, the voltage is APPLIED across the gate and source to control the drain current, hence while writing small signal model of an FET, on the output side GM VGSrepresents a current source which can be controlled by the input voltage VGS. |
|