Most of the questions are from gate syllabus.and from non gate i got questions from computer networks(TCP IP), from c language,measurements also.Here i am discussing some questions which I remember.
DIGITAL:
1)two muxes are cascaded and we are asked for its output
2)0.1101111 of base 2 to decimal conversion
3)some 8 bit binary numbers are given and asked for which number is divisible by some binary 8 bit number(01110110)
4)a logic gate implementation using diodes is given
its answer is like (X+Y)Z.
ANALOG:
1) A log amplifier is given asked for its output v2-v1 when two differnt inputs 1v and 3v are given.
its ans is log3.
2)Relaxation oscillator is given using opamp.and asked for its waveform at non inverting terminal input.
3)An opamp is given such that it has inputs both at inverting and non inverting terminals.when switch is connected to position 1 then inverting terminal has input v1 and non inverting terminal has input noise voltage Vn .when switch is in position 2 only non inverting terminal has both sources v1 and Vn..They have asked gains when switch is in position 1 and 2
4) A clamper circuit is given asked for its output.
SIGNALS AND SYSTEMS:
1) band pass signal is given and asked for its minimum sampling rate
2)a differential equation is given and asked for its output when input is step.
3) exp(-2t)u(n-2),whether the system is stable,causal.
COMMUNNICATION:
1) the question is about frequency deviation comparison.when two signals are cos(200pit) and cos(400pit).when k is constant.compare frequency deviation
2)some statements are given regarding frequency deviation like it is prapotion to frequency ,independent of f,directly praportional to amplitude.asked for correct statement.
CONTROL SYSTEM:
1) question is like finding the k value for which the system is stable.
2) regarding the gain margin ,phase margin
3)one question from polar plot. asked whether pole/zero is nearer to origin.
NETWORKS:
1) a circuit is given and asked for voltage across one element
2)a current source and some (around 8 resistors) are in parallel to it .asked for current through one resistor.
3)from transients a current equation given and aksed for relation between L and R.(time constant from eqution has to be taken).
ELECTROMAGNETICS :
1) characteristi impedance ,phase velocity ,operating frequecny ,load impedance is given asked for Zin.
2)asked for cutoff frequency of dominant mode parameters are given.
3)potential is given .asked for electrostatic potential
ELECTRONIC DEVICES:
1) Conductivity is given.Permitivity is given.asked for frequency at which conduction current density is equal to displacement current density.
2)Mathing question is given like following
chemical vapour diposition----------------------epitaxial diffusion
photolithography---------------------------------- mask pattern
and some third term i didnt remember.
3)For ohmic contacts the work function of metal and semiconductor are greater or less
4)in reverse bias of schottky diode, the direction of motion of electron is from metal to semiconductor or from semiconductor to metal.
5)some statements are given regarding the ion implantation .asked for right one.
6)which of the following does not exhiit negative resistance
a)zener b)tunnel c)impatt d)PIN
COMPUTER NETWORKS:
1) Question is on tcp ip
2) some statements regarding cache memory. asked for right one.
3)one question from c program.
DIGITAL:
1)two muxes are cascaded and we are asked for its output
2)0.1101111 of base 2 to decimal conversion
3)some 8 bit binary numbers are given and asked for which number is divisible by some binary 8 bit number(01110110)
4)a logic gate implementation using diodes is given
its answer is like (X+Y)Z.
ANALOG:
1) A log amplifier is given asked for its output v2-v1 when two differnt inputs 1v and 3v are given.
its ans is log3.
2)Relaxation oscillator is given using opamp.and asked for its waveform at non inverting terminal input.
3)An opamp is given such that it has inputs both at inverting and non inverting terminals.when switch is connected to position 1 then inverting terminal has input v1 and non inverting terminal has input noise voltage Vn .when switch is in position 2 only non inverting terminal has both sources v1 and Vn..They have asked gains when switch is in position 1 and 2
4) A clamper circuit is given asked for its output.
SIGNALS AND SYSTEMS:
1) band pass signal is given and asked for its minimum sampling rate
2)a differential equation is given and asked for its output when input is step.
3) exp(-2t)u(n-2),whether the system is stable,causal.
COMMUNNICATION:
1) the question is about frequency deviation comparison.when two signals are cos(200pit) and cos(400pit).when k is constant.compare frequency deviation
2)some statements are given regarding frequency deviation like it is prapotion to frequency ,independent of f,directly praportional to amplitude.asked for correct statement.
CONTROL SYSTEM:
1) question is like finding the k value for which the system is stable.
2) regarding the gain margin ,phase margin
3)one question from polar plot. asked whether pole/zero is nearer to origin.
NETWORKS:
1) a circuit is given and asked for voltage across one element
2)a current source and some (around 8 resistors) are in parallel to it .asked for current through one resistor.
3)from transients a current equation given and aksed for relation between L and R.(time constant from eqution has to be taken).
ELECTROMAGNETICS :
1) characteristi impedance ,phase velocity ,operating frequecny ,load impedance is given asked for Zin.
2)asked for cutoff frequency of dominant mode parameters are given.
3)potential is given .asked for electrostatic potential
ELECTRONIC DEVICES:
1) Conductivity is given.Permitivity is given.asked for frequency at which conduction current density is equal to displacement current density.
2)Mathing question is given like following
chemical vapour diposition----------------------epitaxial diffusion
photolithography---------------------------------- mask pattern
and some third term i didnt remember.
3)For ohmic contacts the work function of metal and semiconductor are greater or less
4)in reverse bias of schottky diode, the direction of motion of electron is from metal to semiconductor or from semiconductor to metal.
5)some statements are given regarding the ion implantation .asked for right one.
6)which of the following does not exhiit negative resistance
a)zener b)tunnel c)impatt d)PIN
COMPUTER NETWORKS:
1) Question is on tcp ip
2) some statements regarding cache memory. asked for right one.
3)one question from c program.
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