GATE EC question library

Practise GATE EC Electronics and Communication previous year questions free. Browse by subject, syllabus topic, year and question type, with answers and available solutions.

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SubjectTopicYearType

A = \begin{bmatrix} 1 &\tan x \\ -\tan x &1 \end{bmatrix},

the determinant of

A^{T}A^{-1}

The contour on the

x-y

plane, where the partial derivative of

x^{2} + y^{2}

with respect to

y

is equal to the partial derivative of

6y+4x

with respect to

x

C

is a circle of radius

r

z_{0},

z

n

is a non-zero integer, then

\oint _{C}\frac{dz}{(z-z_{0})^{n+1}}

Consider the function

g(t) = e^{-t}\sin(2\pi t)u(t)

u(t)

is the unit step function. The area under

g(t)

\displaystyle{}\sum_{n=0}^{\infty} n \left(\dfrac{1}{2}\right)^{n}

For the circuit shown in the figure, the Thevenin equivalent voltage (in Volts) across terminals

a-b

In the circuit shown, the voltage

V_{X}

(in Volts) is ________.

At very high frequencies, the peak output voltage

V_{0}

(in Volts) is _______.

Which one of the following processes is preferred to form the gate dielectric

(SiO_{2})

If the base width in a bipolar junction transistor is doubled, which one of the following statements will be TRUE?

In the circuit shown in the figure, the BJT has a current gain

(\beta)

50.

For an emitter-base voltage ܸ

V_{EB} = 600\: mV,

the emitter-collector voltage

V_{EC}

(in Volts) is _______.

In the circuit shown using an ideal opamp, the

3

-dB cut-off frequency (in Hz) is _______.

In the circuit shown, assume that diodes

D_{1}

D_{2}

are ideal. In the steady state condition, the average voltage

V_{ab}

(in Volts) across the

0.5\: \mu F

capacitor is ______.

The circuit shown consists of J-K flip-flops, each with an active low asynchronous reset

(\overline{R_{d}}\:\text{input}).

The counter corresponding to this circuit is

In the circuit shown, diodes

D_{1}, D_{2}

D_{3}

are ideal, and the inputs

E_{1} , E_{2}

E_{3}

“0\: V”

‘0’

“10\: V”

‘1’

. What logic gate does the circuit represent?

Which one of the following

8085

microprocessor programs correctly calculates the product of two

8

-bit numbers stored in registers

B

C?

The impulse response of an LTI system can be obtained by

Consider a four-point moving average filter defined by the equation

y[n] = \displaystyle{}\sum _{i=0}^{3}\alpha_{i}\:x[n-i].

The condition on the filter coefficients that results in a null at zero frequency is

Consider the Bode plot shown in the figure. Assume that all the poles and zeros are real-valued. The value of

f_{H}\: – f_{L}\:( \text{in}\: Hz)

is ___________.

The phase margin (in degrees) of the system

G(s) = \dfrac{10}{s(s+10)}