Electronics and Communication Engineering
2017 · Paper 2
Take it one question at a time. Try an answer, then check your understanding.
Complete GATE ECE 2017 Paper 2 overview, original pages and practice · Timed previous-paper practice
Questions 40–42 of 65. Imported answers require review unless explicitly marked reviewed.
Question 40
Open questionECMCQ2 marksNeeds review
Assuming that transistors M1 and M2 are identical and have a threshold voltage of 1 V, the state of transistors M1 and M2 are respectively
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Open questionECNAT2 marksNeeds review
In the circuit shown, transistors Q1 and Q2 are biased at a collector current of 2.6 mA. Assuming that transistor current gains are sufficiently large to assume collector current equal to emitter current and thermal voltage of 26 mV, the magnitude of voltage gain
in the mid-band frequency range is ______ (up to second decimal place). 
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You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 42
Open questionECNAT2 marksNeeds review
In the voltage reference circuit shown in the figure, the op-amp is ideal and the transistors Q₁, Q₂, ..., Q₃ are identical in all respects and have infinitely large values of common-emitter current gain (β). The collector current (
) of the transistors is related to their base-emitter voltage (
) by the relation
, where
is the saturation current. Assume that the voltage
shown in the figure is 0.7 V and the thermal voltage
. 
The output voltage
(in volts) is ______Log in to check the answer
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