Electronic Devices Circuits Online Quiz Online Exam Quiz
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An op amp having a slew rate of 20 V/µs is to be used in the unity-gain follower configuration, with input pulses that rise from 0 to 3 V. What is the shortest pulse that can be used while ensuring full-amplitude output?
Options
A : 0.10 µs
B : 0.15 µs
C : 0.20 µs
D : 0.30 µs
For operation with 10-V output pulses with the requirement that the sum of the rise and fall times represent only 20% of the pulse width (at half amplitude), what is the slew-rate requirement for an op amp to handle pulses 2 µs wide? (Note: The rise and fall times of a pulse signal are usually measured between the 10%- and 90%-height points.)
Options
A : 10 V/µs
B : 20 V/µs
C : 40 V/µs
D : 80 V/µs
A particular op amp using ±15-V supplies operates linearly for outputs in the range ?12 V to +12 V. If used in an inverting amplifier configuration of gain –100, what is the rms value of the largest possible sine wave that can be applied at the input without output clipping?
Options
A : 120 mV
B : 60 mV
C : 84.85 mV
D : 42.42 mV
Determine the slew rate of the amplifier having full power bandwidth f0 and the rated output voltage as V0. Given that the input signal is of sinusoidal nature.
Options
A : 2?f0 V0
B : V0 / 2?f0
C : V0 / f0
D : f0 V0
If Vi = 0.5 V, what is the maximum frequency before the output distorts?
Options
A : 31.8 kHz
B : 318 kHz
C : 3.18 kHz
D : 3.18 MHz
The full-power bandwidth, fM, is the maximum frequency at which
Options
A : an output sinusoid with an amplitude equal to the op-amp rated output voltage (Vo max) can be produced without distortion
B : it is the range of the frequencies in which the amplitude of output signal is equal to or greater than half of the op-amp rated output voltage
C : it is the range of the frequencies in which the amplitude of output signal is equal to or less than half of the op-amp rated output voltage
D : It is the range of the frequencies in which the power gain is half or more than half of the maximum rated power gain of the op-amp
Slew rate of an amplifier is defined as
Options
A : Minimum rate of change of the output possible in a real operational amplifier
B : Maximum rate of change of the output possible in a real operational amplifier
C : Average rate of change of the output possible in a real operational amplifier
D : Ratio of the maximum and the average rate of change of the output in a real amplifier
Which of the following is not limitation of the operational amplifier
Options
A : Output voltage saturation
B : Output current limits
C : Slew rate
D : None of the mentioned
The units of the full power bandwidth is
Options
A : Watt
B : Joule
C : Seconds
D : Hertz
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