WorksheetsOperational Amplifiers Quiz
Total questions: 25
Worksheet time: 11mins
In which of the following are operational amplifiers (op-amps) used?
Oscillators
Filters
Instrumentation circuits
All of the above
This circuit is an example of a _____.
single-ended input
double-ended (differential) input
double-ended output
common-mode operation
This circuit is an example of a _____.
single-ended input
double-ended (differential) input
double-ended output
common-mode operation
This circuit is an example of a _____.
single-ended input
double-ended (differential) input
double-ended output
common-mode operation
This circuit is an example of a _____.
single-ended input
double-ended (differential) input
double-ended output
common-mode operation
In which of the following operations is the resulting output signal of the differential amplifier near zero?
Single-ended
Double-ended
Common-mode
None of the above
What is the level of the voltage between the input terminals of an op-amp?
Virtually zero
5 V
18 V
22 V
What is the level of the current through the amplifier input(s) to ground in an op-amp?
Virtually zero
1.7 mA
2.8 mA
3.3 mA
Calculate the overall voltage gain of the circuit if R1 = 100Ω and Rf = 1 kΩ.
-1
-10
11
9
Calculate the overall voltage gain of the circuit if R1 = 100 Ω and Rf = 1 kΩ.
-11
-10
11
9
What is the voltage gain of the unity follower?
0
1
-1
Infinity
Calculate the input voltage if R1 = 100 Ω, Rf = 1 kΩ, and Vout = 550 mV.
-50 mV
-5 mV
550 mV
50 mV
Calculate the output voltage if R1 = R2 = R3 = 100 Ω, Rf = 1 kΩ, and V1 = V2 = V3 = 50 mV.
-1.5 V
1.5 V
0.5 V
-0.5 V
What is the scale multiplier (factor) of a basic integrator?
R / C
C / R
-RC
-1 / RC
This circuit is referred to as a(n) _____.
inverting amplifier
noninverting amplifier
differentiator
integrator
This circuit is referred to as a(n) _____.
inverting amplifier
noninverting amplifier
differentiator
integrator
Which of the following circuit conditions affect(s) the output offset voltage of an op-amp?
An input offset voltage, VIO
An input offset current, IIO
Both an input offset voltage, VIO and an input offset current, IIO
None of the above
What is the level of the roll-off in most op-amps?
-6 dB / decade
-20 dB / octave
-6 dB / decade or -20 dB / octave
-20 dB / decade or -6 dB / octave
What is the open-loop gain of an op-amp at the unity-gain frequency of the op-amp?
200,000
50,000
200
1
What is the cutoff frequency of an op-amp if the unity-gain frequency is 1.5 MHz and the open-loop gain is 100,000?
5 Hz
10 Hz
15 Hz
20 Hz
What is the slew rate of an op-amp if the output voltages change from 2 V to 3 V in 0.2 s?
5 V/s
3 V/s
2 V/s
1 V/s
Calculate the output impedance of an inverting op-amp using the 741 op-amp (ro = 75 , AOL = 200 V/mV) if R1 = 100 and Rf = 1 k.
0.011
0.00375
0.0375
0.375
What is the difference voltage if the inputs are an ideal opposite signal?
The differential gain times twice the input signal.
The differential gain times the input signal.
The common-mode gain times twice the input signal.
The common-mode gain times the input signal.
At what input voltage level does the output voltage level become numerically equal to the value of the differential gain of the amplifier?
Vi1 = -Vi2 = 0.25 V
V i1 = -V i2 = 0.50 V
V i1 = -V i2 = 0.75 V
V i1 = -Vi2 = 1.00 V
At what input voltage level does the output voltage level become numerically equal to the value of the common-mode gain of the amplifier?
Vi1 = -Vi2 = 0.25 V
Vi1 = -Vi22 = 0.50 V
Vi1 = -Vi2 = 0.75 V
Vi1 = -Vi2 = 1.00 V
