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Questions without answers in Analog and Digital Electronics
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0
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0
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1
GATE201348
In the figure shown below, the chopper feeds a resistive load from a battery source. $MOSFET\: Q $ is switched at $250 kHz$ with a $\text{duty ratio}$ of $0.4$. All elements of the circuit are assumed to be ideal. The average source current in Amps in steadystate is $3/2$ $5/3$ $5/2$ $15/4$
asked
Feb 12, 2017
in
Analog and Digital Electronics
by
piyag476
(
1.5k
points)
gate2013ee
mosfet
diode
clippers
0
votes
0
answers
2
GATE201349
In the figure shown below, the chopper feeds a resistive load from a battery source. $MOSFET\: Q$ is switched at $250 kHz$ with a $\text{duty ratio}$ of $0.4$. All elements of the circuit are assumed to be ideal. The PEAKTOPEAK source current ripple in $Amps$ is $0.96$ $0.144$ $0.192$ $0.288$
asked
Feb 12, 2017
in
Analog and Digital Electronics
by
piyag476
(
1.5k
points)
gate2013ee
ripplecurrent
electronics
0
votes
0
answers
3
GATE201354
The Voltage Source Inverter $(VSI)$ shown in the figure below is switched to provide a $50 Hz$, squarewave ac output voltage $(vo)$ across an $RL$ load. Reference polarity of $vo$ and reference direction of the output current $i_o$ are indicated in the figure. It is given ... $i_0> 0$ the pair of devices which conducts the load current is $Q1, Q2$ $Q3, Q4$ $D1, D2$ $D3, D4$
asked
Feb 12, 2017
in
Analog and Digital Electronics
by
piyag476
(
1.5k
points)
gate2013ee
inverter
dualityswitch
0
votes
0
answers
4
GATE201355
The Voltage Source Inverter $(VSI)$ shown in the figure below is switched to provide a $50 Hz$, squarewave ac output voltage $(vo)$ cross an $RL$ load. Reference polarity of $vo$ and reference direction of the output current $i_0$ are indicated in the figure. ... $IGBTs$ during turnon/turnoff is ZVS during turnoff ZVS during turnon ZCS during turnoff ZCS during turnon
asked
Feb 12, 2017
in
Analog and Digital Electronics
by
piyag476
(
1.5k
points)
gate2013ee
switching
turnontime
turnoff
time
0
votes
0
answers
5
GATE201337
The clock frequency applied to the digital circuit shown in the figure below is $1$ $kHz$. If the initial state of the output $Q$ of the flipflop is ‘$0$’, then the frequency of the output waveform $Q$ in $kHz$ is $0.25$ $0.5$ $1$ $2$
asked
Feb 12, 2017
in
Analog and Digital Electronics
by
piyag476
(
1.5k
points)
gate2013ee
flipflop
latches
0
votes
0
answers
6
GATE201339
In the circuit shown below the opamps are ideal. Then $V_{out}$ in Volts is $4$ $6$ $8$ $10$
asked
Feb 12, 2017
in
Analog and Digital Electronics
by
piyag476
(
1.5k
points)
gate2013ee
operationalamplifier
reverseamplifier
0
votes
0
answers
7
GATE201344
Thyristor $T$ in the figure below is initially off and is triggered with a single pulse of width $10$ $μs$. It is given that $L=\bigg(\dfrac{100}{\pi }\bigg)\mu H$ and $C=\bigg(\dfrac{100}{\pi }\bigg)\mu F$. Assuming latching and holding currents of the thyristor are both zero and the initial charge on $C$ is zero, $T$ conducts of $10\mu s$ $50\mu s$ $100\mu s$ $200\mu s$
asked
Feb 12, 2017
in
Analog and Digital Electronics
by
piyag476
(
1.5k
points)
gate2013ee
gatesignal
converters
0
votes
0
answers
8
GATE201314
The input impedance of the permanent magnet moving coil $(PMMC)$ voltmeter is infinite. Assuming that the diode shown in the figure below is ideal, the reading of the voltmeter in Volts is $4.46$ $3.15$ $2.23$ $0$
asked
Feb 12, 2017
in
Analog and Digital Electronics
by
piyag476
(
1.5k
points)
gate2013ee
tube
diode
electronics
0
votes
0
answers
9
GATE201316
A bulb in a staircase has two switches, one switch being at the ground floor and the other one at the first floor. The bulb can be turned $ON$ and also can be turned $OFF$ by any one of the switches irrespective of the state of the other switch. The logic of switching of the bulb resembles an $AND$ gate an $OR$ gate an $XOR$ gate a $NAND$ gate
asked
Feb 12, 2017
in
Analog and Digital Electronics
by
piyag476
(
1.5k
points)
gate2013ee
logicgates
truthtable
0
votes
0
answers
10
GATE201318
A bandlimited signal with a maximum frequency of $5\:kHz$ is to be sampled. According to the sampling theorem, the sampling frequency in $kHz$ which is not valid is $5$ $12$ $15$ $20$
asked
Feb 12, 2017
in
Analog and Digital Electronics
by
piyag476
(
1.5k
points)
gate2013ee
bandwidth
samplingtheorem
0
votes
0
answers
11
GATE2014350
The transfer characteristic of the Opamp circuit shown in figure is
asked
Feb 12, 2017
in
Analog and Digital Electronics
by
makhdoom ghaya
(
9.3k
points)
gate2014ee3
transfercharacteristics
operationalamplifier
0
votes
0
answers
12
GATE2014351
A $3$$bit$ gray counter is used to control the output of the multiplexer as shown in the figure. The initial state of the counter is $0002$. The output is pulled $high$. The output of the circuit follows the sequence $I_0$, $1$, $1$, $I_1$, $I_3$, $1$, $1$, $I_2$ $I_0$, $1$, $I_1$ ... , $I_0$, $1$, $I_1$, $I_2$, $1$, $I_3$,$1$ $I_0$, $I_1$, $I_2$, $I_3$, $I_0$, $I_1$, $I_2$, $I_3$
asked
Feb 12, 2017
in
Analog and Digital Electronics
by
makhdoom ghaya
(
9.3k
points)
gate2014ee3
binarycode
counter
multiplexer
0
votes
0
answers
13
GATE2014352
A hysteresis type $TTL$ inverter is used to realize an oscillator in the circuit shown in the figure. If the lower and upper trigger level voltages are $0.9$ $V$ and $1.7$ $V$, the period (in $ms$), for which output is $LOW$, is __________.
asked
Feb 12, 2017
in
Analog and Digital Electronics
by
makhdoom ghaya
(
9.3k
points)
gate2014ee3
triggerlevel
oscillator
numericalanswers
0
votes
0
answers
14
GATE2014355
A singlephase voltage source inverter shown in figure is feeding power to a load. The triggering pulses of the devices are also shown in the figure. If the load current is sinusoidal and is zero at $0,\pi , 2\pi$ …, the node voltage $V_{AO}$ has the waveform
asked
Feb 12, 2017
in
Analog and Digital Electronics
by
makhdoom ghaya
(
9.3k
points)
gate2014ee3
pulses
invertor
0
votes
0
answers
15
GATE2014348
In the bridge circuit shown, the capacitors are loss free. At balance, the value of capacitance $C_1$ in microfarad is _________.
asked
Feb 12, 2017
in
Analog and Digital Electronics
by
makhdoom ghaya
(
9.3k
points)
gate2014ee3
bridgecircuit
source
numericalanswers
0
votes
0
answers
16
GATE2014349
Two monoshot multivibrators, one positive edge triggered ($M_1$) and another negative edge triggered ($M_2$), are connected as shown in figure The monoshots $M_1$ and $M_2$ when triggered produce pulses of width $T_1$ and $T_2$ respectively, where $T_1$>$T_2$. The steady state output voltage $v_0$ of the circuit is
asked
Feb 12, 2017
in
Analog and Digital Electronics
by
makhdoom ghaya
(
9.3k
points)
gate2014ee3
multivibrator
edgetriggered
0
votes
0
answers
17
GATE2014322
An operationalamplifier circuit is shown in the figure. $(\frac{R_2}{R_1})v_i$ $(1+\frac{R_2}{R_1})v_i$ $(1+\frac{R_2}{R_1})v_i$ +$V_{sat}$ or $V_{sat}$
asked
Feb 12, 2017
in
Analog and Digital Electronics
by
makhdoom ghaya
(
9.3k
points)
gate2014ee3
operationalamplifier
feedbackresistor
0
votes
0
answers
18
GATE2014323
In $8085A$ microprocessor, the operation performed by the instruction $LHLD$ $2100_H$ is $(H)\leftarrow 21_H$ , $(L)\leftarrow 00_H$ $(H)\leftarrow M(2100_H)$ , $(L)\leftarrow M(2101_H)$ $(H)\leftarrow M(2101_H)$ , $(L)\leftarrow M(2100_H)$ $(L)\leftarrow 00_H$ , $(H)\leftarrow 21_H$
asked
Feb 12, 2017
in
Analog and Digital Electronics
by
makhdoom ghaya
(
9.3k
points)
gate2014ee3
binarycode
processing
0
votes
0
answers
19
GATE2014251
A $JK$ flip flop can be implemented by $T$ flipflops. Identify the correct implementation.
asked
Feb 12, 2017
in
Analog and Digital Electronics
by
makhdoom ghaya
(
9.3k
points)
gate2014ee2
tflipflop
latches
0
votes
0
answers
20
GATE2014249
An oscillator circuit using ideal opamp and diodes is shown in the figure. The time duration for $+ve$ part of the cycle is $\Delta t_1$ and for $–ve$ part is $\Delta t_2$ . The value of $e^{\frac{\Delta t_1\Delta t_2}{RC}}$ will be _____________.
asked
Feb 12, 2017
in
Analog and Digital Electronics
by
makhdoom ghaya
(
9.3k
points)
gate2014ee2
operationalamplifier
feedbackresistor
numericalanswers
0
votes
0
answers
21
GATE2014250
The $SOP$ (sum of products) form of a Boolean function is $\sum (0,1,3,7,11)$, where inputs are $A$,$B$,$C$,$D$ ($A$ is $MSB$, and $D$ is $LSB$). The equivalent minimized expression of the function is $(\bar{B}+C)(\bar{A}+C)(\bar{A}+\bar{B})(\bar{C}+D)$ ... $(\bar{B}+C)(A+\bar{B})(\bar{A}+\bar{B})(\bar{C}+D)$
asked
Feb 12, 2017
in
Analog and Digital Electronics
by
makhdoom ghaya
(
9.3k
points)
gate2014ee2
booleanfunction
leastsignificantbit
0
votes
0
answers
22
GATE2014235
A $10$ $kHz$ evensymmetric square wave is passed through a bandpass filter with centre frequency at $30$ $kHz$ and $3$ $dB$ passband of $6$ $kHz$. The filter output is a highly attenuated square wave at $10$ $kHz$. nearly zero. a nearly perfect cosine wave at $30$ $kHz$ a nearly perfect sine wave at $30$ $kHz$.
asked
Feb 12, 2017
in
Analog and Digital Electronics
by
makhdoom ghaya
(
9.3k
points)
gate2014ee2
bandlimitingcircuit
filters
0
votes
0
answers
23
GATE2014229
Assuming the diodes to be ideal in the figure, for the output to be clipped, the input voltage $v_i$ must be outside the range $1$ $V$ to $2$ $V$ $2$ $V$ to $4$ $V$ $+1$ $V$ to $2$ $V$ $+2$ $V$ to $4$ $V$
asked
Feb 12, 2017
in
Analog and Digital Electronics
by
makhdoom ghaya
(
9.3k
points)
gate2014ee2
clippercircuits
diodes
0
votes
0
answers
24
GATE2014221
Which of the following is an invalid state in an $8$$4$$2$$1$ Binary Coded Decimal counter $1$ $0$ $0$ $0$ $1$ $0$ $0$ $1$ $0$ $0$ $1$ $1$ $1$ $1$ $0$ $0$
asked
Feb 12, 2017
in
Analog and Digital Electronics
by
makhdoom ghaya
(
9.3k
points)
gate2014ee2
binarycode
counter
0
votes
0
answers
25
GATE2014222
The transistor in the given circuit should always be in active region. Take $V_{CE(sat)}$ = $0.2$ $V$ , $V_{BE}$=$0.7$ $V$. The maximum value of $R_c$ in $Ω$ which can be used, is ______________.
asked
Feb 12, 2017
in
Analog and Digital Electronics
by
makhdoom ghaya
(
9.3k
points)
gate2014ee2
gainfactor
bjttransistor
numericalanswers
0
votes
0
answers
26
GATE2014224
A stepup chopper is used to feed a load at $400$ $V$ $dc$ from a $250$ $V$ $dc$ source. The inductor current is continuous. If the ‘off’ time of the switch is $20$ $μs$, the switching frequency of the chopper in $kHz$ is ____________.
asked
Feb 12, 2017
in
Analog and Digital Electronics
by
makhdoom ghaya
(
9.3k
points)
gate2014ee2
boostconverter
numericalanswers
0
votes
0
answers
27
GATE2014149
Given that the opamps in the figure are ideal, the output voltage $V_0$ is $(V_1V_2)$ $2(V_1V_2)$ $(V_1V_2)/2$ $(V_1+V_2)$
asked
Feb 12, 2017
in
Analog and Digital Electronics
by
makhdoom ghaya
(
9.3k
points)
gate2014ee1
operationalamplifier
negativefeedback
0
votes
0
answers
28
GATE2014152
An output device is interfaced with $8$bit microprocessor $8085A$. The interfacing circuit is shown in figure The interfacing circuit makes use of $3$ Line to $8$ Line decoder having $3$ enable lines $E_1,\overline{E_2},\overline{E_3}$ . The address of the device is $50_H$ $5000_H$ $A0_H$ $A000_H$
asked
Feb 12, 2017
in
Analog and Digital Electronics
by
makhdoom ghaya
(
9.3k
points)
gate2014ee1
microprocessor
interfacing
circuit
0
votes
0
answers
29
GATE2014124
The figure shows the circuit of a rectifier fed from a $230V(\text{rms}), 50Hz$ sinusoidal voltage source. If we want to replace the current source with a resistor so that the rms value of the current supplied by the voltage source remains unchanged, the value of the resistance $(\text{in ohms})$ is __________(Assume diodes to be ideal.)
asked
Feb 12, 2017
in
Analog and Digital Electronics
by
makhdoom ghaya
(
9.3k
points)
gate2014ee1
rectifier
diode
numericalanswers
0
votes
0
answers
30
GATE2015232
For the switching converter shown in the following figure, assume steadystate operation. Also assume that the components are ideal, the inductor current is always positive and continuous and switching period is $T_{s}$. If the voltage $V_{L}$ is as shown, the duty cycle of the switch $S$ is ________.
asked
Feb 12, 2017
in
Analog and Digital Electronics
by
makhdoom ghaya
(
9.3k
points)
gate2015ee2
steadystateoperation
reversecurrent
numericalanswers
0
votes
0
answers
31
GATE2015233
In the given rectifier, the delay angle of the thyristor $T_{1}$ measured from the positive going zero crossing of $V_{s}$ is $30$°. If the input voltage $V_{s}$ is $100 \sin(100 \pi t) V$, the average voltage across $R$ (in Volt) under steadystate is _________.
asked
Feb 12, 2017
in
Analog and Digital Electronics
by
makhdoom ghaya
(
9.3k
points)
gate2015ee2
bridgerectifier
diodes
thyrister
numericalanswers
0
votes
0
answers
32
GATE2015231
A buck converter feeding a variable resistive load is shown in the figure. The switching frequency of the switch $S$ is $100$ kHz and the duty ratio is $0.6$. The output voltage $V_{0}$ is $36$ V. Assume that all the components are ideal, and that the output voltage is ripplefree. The value of $R$ (in Ohm) that will make the inductor current ($i_{L}$) just continuous is _________.
asked
Feb 12, 2017
in
Analog and Digital Electronics
by
makhdoom ghaya
(
9.3k
points)
gate2015ee2
stepdownconverter
ripplevoltages
numericalanswers
0
votes
0
answers
33
GATE2015215
When a bipolar junction transistor is operating in the saturation mode, which one of the following statements is TRUE about the state of its collectorbase $(CB)$ and the baseemitter $(BE)$ junctions? The $CB$ junction is forward biased and the $BE$ junction ... forward biased. Both the $CB$ and $BE$ junctions are forward biased. Both the $CB$ and $BE$ junctions are reverse biased.
asked
Feb 12, 2017
in
Analog and Digital Electronics
by
makhdoom ghaya
(
9.3k
points)
gate2015ee2
bjtasswitch
commonemitter
0
votes
0
answers
34
GATE201528
In the following circuit, the input voltage $V_{in}$ is $100 \sin(100 \pi t)$. For $100 \pi RC = 50$, the average voltage across $R$ (in Volts) under steadystate is nearest to $100$ $31.8$ $200$ $63.6$
asked
Feb 12, 2017
in
Analog and Digital Electronics
by
makhdoom ghaya
(
9.3k
points)
gate2015ee2
steadystateoperation
diodes
0
votes
0
answers
35
GATE2015212
In the following circuit, the transistor is in active mode and $V_{C} = 2 V$. To get $V_{C} = 4 V$, we replace $R_{C}$ with $R′_{C}$. Then the ratio $R'_{C}$/ $R_{C}$ is _________.
asked
Feb 12, 2017
in
Analog and Digital Electronics
by
makhdoom ghaya
(
9.3k
points)
gate2015ee2
amplifyingtransister
commomemitter
numericalanswers
0
votes
0
answers
36
GATE2015213
Consider the following Sum of Products expression, $F$. $F= ABC + \bar{A}\bar{B}C + A\bar{B}C + \bar{A}BC + \bar{A}\bar{B}\bar{C}$ The equivalent Product of Sums expression is $F= (A+\bar{B}+C) (\bar{A}+B+C) (\bar{A}+\bar{B}+C)$ $F= (A+\bar{B}+\bar{C}) (A+B+C) (\bar{A}+\bar{B}+\bar{C})$ $F= (\bar{A}+B+\bar{C}) (A+\bar{B}+\bar{C}) (A+B+C)$ $F= (\bar{A}+\bar{B}+C) (A+B+\bar{C}) (A+B+C)$
asked
Feb 12, 2017
in
Analog and Digital Electronics
by
makhdoom ghaya
(
9.3k
points)
gate2015ee2
notgate
sumopproducts
0
votes
0
answers
37
GATE2015214
The filters $F1$ and $F2$ having characteristics as shown in Figures $(a)$ and $(b)$ are connected as shown in Figure $(c)$. The cutoff frequencies of $F1$ and $F2$ are $f_{1}$ and $f_{2}$ respectively. If $f_{1} < f_{2}$, the resultant circuit exhibits the characteristic of a Bandpass filter Bandstop filter All pass filter HighQ filter
asked
Feb 12, 2017
in
Analog and Digital Electronics
by
makhdoom ghaya
(
9.3k
points)
gate2015ee2
operationalamplifier
voltagedivider
0
votes
0
answers
38
GATE2015138
$f(A, B, C, D)$ = $\pi M(0,1,3,4,5,7,9,11,12,13,14,15)$ is a maxterm representation of a Boolean function $f (A, B, C, D)$ where $A$ is the $MSB$ and $D$ is the $LSB$. The equivalent minimized representation of this function is $(A +\bar{C}+D) (\bar{A}+B+D)$ ... $(B+\bar{C}+D) (A+\bar{B}+\bar{C}+D) (\bar{A}+B+C+D)$
asked
Feb 12, 2017
in
Analog and Digital Electronics
by
makhdoom ghaya
(
9.3k
points)
gate2015ee1
logicgates
booleanalgebra
0
votes
0
answers
39
GATE2015132
A self commutating switch $SW$, operated at duty cycle $\delta$ is used to control the load voltage as shown in the figure Under steady state operating conditions, the average voltage across the inductor and the capacitor respectively, are $V_{L}=0$ and $V_{c}=\frac{1}{1\delta} V_{dc}$ ... $V_{L}=\frac{\delta}{2}V_{dc}$ and $V_{c}=\frac{\delta}{1\delta} V_{dc}$
asked
Feb 12, 2017
in
Analog and Digital Electronics
by
makhdoom ghaya
(
9.3k
points)
gate2015ee1
dutycycle
selfcommutatingswitch
0
votes
0
answers
40
GATE2015140
An $8$bit, unipolar Successive Approximation Register type ADC is used to convert $3.5$ V to digital equivalent output. The reference voltage is $+5$ V. The output of the ADC, at the end of 3rd clock pulse after the start of conversion, is 1010 0000 1000 0000 0000 0001 0000 0011
asked
Feb 12, 2017
in
Analog and Digital Electronics
by
makhdoom ghaya
(
9.3k
points)
gate2015ee1
analogtodigitalconverter
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