GATE ECE · 2018 · EC
Question 1: BJT and MOSFET amplifiers
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Question 1
ECMCQ1 markNeeds review
Two identical MOS transistors M₁ and M₂ are connected as shown below. The circuit is used as an amplifier with the input connected between G and S terminals and the output taken between D and S terminals. V_bias and V_D are so adjusted that both transistors are in saturation. The transconductance of this combination is defined as
while the output resistance is
, where i_D is the current flowing into the drain of M₂. Let g_m₁, g_m₂ be the transconductances and r_o₁, r_o₂ be the output resistances of transistors M₁ and M₂, respectively.
Which of the following statements about estimates for g_m and r_o is correct?
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2018EC
GATE ECE 2018 · Paper 1
Electronics and Communication Engineering · Original paper archive
- Section
- Electronics and Communication Engineering
- Question type
- Multiple choice (MCQ)
- Marks
- 1 mark
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