GATE Electronics and Communication Online Test Series 2

A total of 30 equal-power users are to share a common communication channel by CDM. Each user transmits information at a rate of 10 kbps via DS spread spectrum and binary PSK. The minimum chip rate to obtain a bit error probability of 10^-5 is

The channel capacity of the binary symmetric channel shown below is

It was found that a sampling rate 20% above the rate would be adequate. So, the maximum SNR that can be realised without increasing the transmission bandwidth would be

A superheterodyne FM receiver operates in the frequency range of 88 – 108 MHz. The IF and local oscillator frequency are chosen such that f_IF LO. The image frequency must fall outside of the 88 – 108 MHz region. The range of variation in f_LO is

Two causal finite length sequences are given below.

{y [n]} = {6, 11, – 13, 16, 1, 9, 2, 8} and {h [n]} = {2, 5, – 1, 4}

If y [n] = h [n] * x [n], then sequence x [n] is

Consider the following 8085 assembly program:

MVI A, DATA1
MOV B, A
SUI 51 H
JC DLT
MOV A, B
SUI 82 H
JC DSPLY

DLT : XRA A
OUT PORT1
HLT
DSPLY : MOV A, B
OUT PORT2
HLT

The program will display

The frequency of oscillation of a stable multivibrator shown below is

The counter shown in figure below is a

The circuit shown below has 4 boxes each described by input P, Q, R and output Y, Z with Y = P ⊕ Q ⊕ R and Z = PQ + .
The circuit acts as a 4 bit

Consider the ideal op – amp circuit shown below.

If it is given that  the common mode rejection ratio (CMRR) is

In the circuit shown below, the Q – point is in the center of the load line. The transistor parameters are β = 150 and V_A= ∞ .

The small signal voltage gain A_v = v_o/v_s is

A 2.4 cm x 1.5 cm wave guide operates in TE10 mode at 9 GHz. The guide is made of brass  and filled with teflon .
The attenuation constant, due to conduction losses  is

A 2.4 cm x 1.5 cm wave guide operates in TE10 mode at 9 GHz. The guide is made of brass  and filled with teflon .
The attenuation constant due to dielectric losses is

Consider the system shown below. The average value of m (t) is zero and maximum value of |m (t)| is M. The square law device is defined by y (t) = 4x (t) + 10x (t).

The value of M, required to produce modulation index of 0.8, is

Consider the system shown below. The average value of m (t) is zero and maximum value of |m (t)| is M.

The square law device is defined by y (t) = 4x (t) + 10x (t).

Let W be the bandwidth of message signal m (t). AM signal would be recovered if

In n – type silicon MOS structure a metal semi conductor work function difference of  = – 0.35 V is required. If gate is n⁺ polysilicon, the required silicon doping is

In n-type silicon MOS structure, a metal semiconductor work function difference of = – 0.35 V is required. If gate is p⁺ polysilicon, the required silicon doping is

For the p – channel transistor in the circuit shown below the parameters are IDSS = 6 mA, VP = 4 V and  = 0.

The value of I_DQ is

For the p – channel transistor in the circuit shown below the parameters are I_DSS = 6 mA, V_P = 4 V and   = 0.

The value of V_SD is

Which of the following is an antonym of the word PROFESSIONAL?

Which one of the following is the synonym of the word DISPARAGE?

Find the odd one out.

Which of the following pairs of words best expresses the relationship similar to that expressed in the capitalised pair given below?

ATMOSPHERE : STRATOSPHERE

Directions: Choose the correct option to fill in the blank.

______________, the more they remain the same.

If n = 1 + x, where x is the product of four consecutive positive integers, which of the following is/are true?
1. n is odd.
2. n is prime.
3. n is a perfect square.