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The main feature of a parametric amplifier is | |
A. | low noise [Wrong Answer] |
B. | very high gain [Wrong Answer] |
C. | broad bandwidth [Correct Answer] |
D. | both (b) and (c) [Wrong Answer] |
View Answer
Explanation:-
Answer : C Discuss it below : !! OOPS Login [Click here] is required to post your answer/result |
Also Read Similar Questions Below :
⇒ When a thyristor is conducting, the voltage drop across it is about
1 V
10 V
100 V
0.1 V
⇒ Which of the following statement about the amplitude limiter is not valid?
Leak type bias must be used
Output must be tuned
The circuit is always biased in class C, by virtue of the leak type bias
When the input increases past the threshold of limiting, the gain decreases to keep the output constant
⇒ The scale of thermocouple instrument is linear.
TRUE
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⇒ The IF bandwidth of a radar receiver is inversely proportional to
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none of the above
⇒ The function shown in the given Figure can be writte
sum of two sinusoidal functions
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difference of two sinusoidal functions one originating at t = 0 and the other at t = 1
none of the above
⇒ A broadcast radio transmitter radiates 5 kW when the modulation percentage is 60. How much of this is carrier power?
6.66 kW
5 kW
4.9 kW
4.23 kW
⇒ In a capacitor filter, the time constant R_{L}C should be small.
TRUE
FALSE
⇒ If F_{n} represents Fourier series coefficient of f(t), then Fourier series coefficient of f(t + t) =
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F_{n}e ^{jω}_{0}^{t}
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F_{n}e ^{-jnω}_{0}^{t}
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⇒ In 8085 microprocessor, what are the contents of register SP, after the interrupt has been star
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⇒ Satellites used for international communication are called
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⇒ Two sinusoidal voltage sources v_{1} = 50 sin (100t) and v_{1} = 50 sin (100t + p) are connected in parallel and fed an inductance X_{L} = 2Ω. The cuirent through X_{L} is
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⇒ Which of the following is not a transducer in true sense?
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⇒ Choose the function f(t), - ∞ < t < + ∞, for which a Fourier series cannot be defined
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⇒ For the waveform shown below, the slew rate and full power bandwidth with respect to op-amp will be respecti
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⇒ In ASCII, letter B is coded as
1000001
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100100
1001000
⇒ When a thyristor is conducting, the voltage drop across it is about
1 V
10 V
100 V
0.1 V
⇒ Which of the following statement about the amplitude limiter is not valid?
Leak type bias must be used
Output must be tuned
The circuit is always biased in class C, by virtue of the leak type bias
When the input increases past the threshold of limiting, the gain decreases to keep the output constant
⇒ The scale of thermocouple instrument is linear.
TRUE
FALSE
⇒ The IF bandwidth of a radar receiver is inversely proportional to
pulse interval
pulse width
PRF
none of the above
⇒ The function shown in the given Figure can be writte
sum of two sinusoidal functions
sum of two sinusoidal functions one originating at t = 0 and the other at t = 1
difference of two sinusoidal functions one originating at t = 0 and the other at t = 1
none of the above
⇒ A broadcast radio transmitter radiates 5 kW when the modulation percentage is 60. How much of this is carrier power?
6.66 kW
5 kW
4.9 kW
4.23 kW
⇒ In a capacitor filter, the time constant R_{L}C should be small.
TRUE
FALSE
⇒ If F_{n} represents Fourier series coefficient of f(t), then Fourier series coefficient of f(t + t) =
F_{n}e ^{-jω}_{0}^{t}
F_{n}e ^{jω}_{0}^{t}
F_{n}e ^{jnω}_{0}^{t}
F_{n}e ^{-jnω}_{0}^{t}
⇒ The poles with greater displacement from the real axis correspond to
higher frequencies of oscillation
stable response
lower frequencies of oscillation
unbounded output
⇒ In 8085 microprocessor, what are the contents of register SP, after the interrupt has been star
0210 H
0211 H
054 CH
054 EH
⇒ For 0 < M < 1, the centres of M circle lie to the right of origin.
TRUE
FALSE
⇒ The current I in the circuit show
- j1 A
j1 A
0
20 A
⇒ Half power point directions for broadside is
60°
30°
45°
at any angle
⇒ For decimal numbe'r 13.5, the floating point representation in 4 byte excess 128 code is
01101100 00000000 00000000 10000100
00000000 01101100 00000000 10000100
00000000 01101100 10000100 00000000
01101100 00000000 10000100 00000000
⇒ In home tape recorders the tape width is 2 inches.
TRUE
FALSE
⇒ In terrestrial microwave links, the number of 'fades' per unit increases as
both the transmission and the distance between the antennas are increased
the transmission frequency is increased but the distance between the antennas is decreased
the transmission frequency is decreased but the distance between the antennas is increased
both the transmission frequency and distance between the antennas are decreased
⇒ Satellites used for international communication are called
cossort
domsat
marisat
intelsat
⇒ Two sinusoidal voltage sources v_{1} = 50 sin (100t) and v_{1} = 50 sin (100t + p) are connected in parallel and fed an inductance X_{L} = 2Ω. The cuirent through X_{L} is
25 A
about 17.5 A
zero
50 A
⇒ The L/C has the dimension of
time
capacitance
velocity
resistance
⇒ The colour code on a carbon resistor is yellow-violet-orange. The value of resistance is
17000 Ω
27000 Ω
37000 Ω
47000 Ω
⇒ In a Vidicon camera tube, the beam current is controlled by
grid G_{1}
grid G_{2}
grids G_{1}, G_{2}, G_{3}
grid G_{2}, G_{3}
⇒ Which of the following is not a transducer in true sense?
Thermocouple
Piezo electric
Photo electric cell
LCD
⇒ In a positive edge triggered D flip flop
D input is called direct set
Preset is called direct reset
Present and clear are called direct set and reset respectively
D input overrides other inputs
⇒ If the diameter of a wire is doubled, its current carrying capacity becomes
one-fourth
half
twice
four times
⇒ Choose the function f(t), - ∞ < t < + ∞, for which a Fourier series cannot be defined
3 sin (25t)
4 cos (20t + 3) + 2 sin (10t)
exp - | t | sin 25 t
1
⇒ What is the necessary a.c. input power from the transformer secondary used in a half wave rectifier to deliver 500 W of d.c. power to the load?
1232 W
848 W
616 W
308 W
⇒ For the waveform shown below, the slew rate and full power bandwidth with respect to op-amp will be respecti
0.02 V/μsec, 1.59 KHz
0.04 V/μsec, 1.59 KHz
0.02 V/μsec, 3.58 KHz
0.02 V/μsec, 1.59 KHz
⇒ Two D flip-flop as shown below are to be connected as a synchronous counter that goes through the following Q_{1}Q_{0} sequ
Q_{1} and Q_{0}
Q_{0} and Q_{1}
Q_{1} Q_{0} and Q_{1} Q_{0}
Q_{1} Q_{0} and Q_{1} Q_{0}
⇒ It is required to measure temperature in the range of 1300-1520°C. The most suitable thermocouple is
chromel constantan
iron constantan
chromel aluminium
platinum-rhodium
⇒ In ASCII, letter B is coded as
1000001
1000010
100100
1001000