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GATE EC : Electronic Devices & Circuits Champion Quiz 4

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Question 1

For a BJT, the common – base current gain 𝛼 = 0.98 and the collector-base junction reverse bias saturation current 𝐼_𝐶0 = 0.6𝜇𝐴. This BJT is connected in the common emitter mode and operated in the active region with a base drive current 𝐼_𝐵 = 20𝜇𝐴. The collector current 𝐼_𝐶 for this mode of operation is.

Question 2

Introducing a resistor in the emitter of a common amplifier stabilizes the dc operating point against variations in

Question 3

In the circuit shown below, for the MOS transistors, μ_nC_ox= 100 μA/V^₂and the threshold voltage V_T = 1V. The voltage V_x (in Volt) at the source of the upper transistor is

Question 4

In the circuit shown below, capacitor C₁ and C₂ are very large and are shorts at the input frequency. v_i is a small signal input. The gain magnitude

at 10 Mrad/s is

Question 5

A Silicon PN Junction at a temperature of 20 °C has a reverse saturation current of 10 pic-Amperes (pA). the reverse saturation current at 40 °C for the same bias is approximately

Question 6

Group I lists four different semiconductor devices. Match each device in Group I with its characteristic property in Group II.

Question 7

The electric field profile in the depletion region of a p-n junction in equilibrium is shown in the figure. Which one of the following statements is NOT TRUE?
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Question 8

When the optical power incident on a photodiode is 10 µW and the responsivity is 0.8 A/W, the photocurrent generated (in µA) is ____

Question 9

The Zener diode in the regulator circuit shown in figure has a Zener voltage of 5.8 Volts and a Zener knee current of 0.5 mA. The maximum load current drawn from this circuit ensuring proper functioning over the input voltage range between 20 and 30 Volts, is
$Description: D:\GradeStack Courses\GATE Tests (Sent by Ravi)\GATE EC-ME-17-Mar\GATE-ECE-2005_files\image112.jpg$

Question 10

In the following limiter circuit, an input voltage V_i = 10 sin 100πt applied. Assume that the diode drop is 0.7V when it is forward biased. The zener breakdown voltage is 6.8 V.

_{The maximum and minimum values of the output voltage respectively are}

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ESE & GATE EC Electronic Devices and Circuits

Aug 31ESE & GATE EC