Electrical Eng. · Question Bank
Electronics
384 questions · page 4 of 20. Answer in your head first, then check the solution.
#61
How can we minimize the effect of the input offset current and input offset voltage at the output offset voltage
Aby making the feedback resistance small
Bby making the feedback resistance large
Cby making the input resistance small
Dby making the input resistance large
#62
What is the most effective way of minimizing the output offset voltage of an opamp?
Aby reducing the value of the feedback resistor
Bby increasing the value of the input resistor
Cby a capacitor-compensation technique
Dby properly using and adjusting the offset-null terminals
#63
What cause(s) the well-adjusted output offset voltage of opamps to change?
Achange in operating temperature
Bcomponent aging
Cvariations in supply voltage
Dall of them
#64
Which opamp parameters that normally affects its small signal dc-amplification performance?
Ainput bias current
Binput offset voltage
Cinput offset current
Dall of them
#65
Opamp parameter that is important in large signal dc-amplification
Ainput offset voltage
Binput offset current
Cslew rate
Dall of them
#66
In large signal dc amplifiers using opamp, which parameter has the least effect on its performance?
Adrift
Bslew rate
Cinput offset voltage
Dinput offset current
#67
For ac amplifiers using opamp, what parameter can affect its performance?
Ainput offset current and voltage
Binput bias current and voltage
Cdrift and slew rate
Dslew rate and frequency response
#68
If an opamp is used to amplify small ac-signals, what parameter you should greatly consider to ensure better performance
Ainput bias current
Bdrift
Cfrequency response
Dslew rate
#69
What do we mean by internally compensated opamps?
AOpamps with internal frequency compensation capacitor to prevent oscillation
BOpamps with an internal compensating resistor to make the output offset voltage zero
COpamps with internal coupling capacitor to block dc voltages and allows ac voltages to pass
DOpamps with internal active components to make its gain constant at the entire operating frequency
#70
The frequency at which the open-loop gain of an opamp is 0.707 times its value at very low frequency
Atreshold frequency
Bbreak frequency
Cminimum frequency
Doperating frequency
#71
What will happen to the voltage gain of opamp when its operating frequency is increased?
Aalso increases
Bincreases exponentially
Cwill decrease
Ddecreases exponentially
#72
The reduction of opamps gain due to increasing operating frequency
Acutoff
Broll-off
Cdiminishing factor
Dreduction step
#73
What do we mean by a 20dB/decade roll-off?
Aa gain reduction by a factor of 10 per decade
Ba gain reduction by a factor of 20 per decade
Ca gain reduction by a factor of 10 per 10 Hz increased in frequency
Da gain reduction by a factor of 20 per 10 Hz increased in frequency
#74
A reduction of opamp's voltage gain by a factor of two each time the frequency doubles.
A2 dB/octave
B2 dB/decade
C6 dB/octave
D6 dB/decade
#75
The low and high cutoff frequencies of an amplifier is also called
Acorner frequencies
B0.707 frequencies
C3-dB frequencies
Dall of these are correct
#76
Rise time is defined as the time required for the output voltage to rise from _______ to ________ of its final value
A0% - 100%
B1% - 99%
C5% - 95%
D10% - 90%
#77
The maximum output voltage rate of change of an opamp
Arise time
Bmaximum voltage swing
Cdifferential rate
Dslew rate
#78
What is the maximum signal frequency that can be used in an opamp having a specified slew rate of 0.5V / µs? The maximum output voltage desired is 5V
A16 kHz
B32 kHz
C100 kHz
D1 MHz
#79
What must be the slew rate of an opamp to be used in order to provide an undistorted output voltage of 10 V at a frequency of 100,000 rad/sec
A0.1 V/µsec
B0.5 V/µsec
C1.0 V/µsec
D6.28 V/µsec
#80
When an opamp is used as a comparator, the output voltage would be +Vsat if
AV+ > V-
BV- > V+
CV- = V+
DV- and V+ are both zero
More Electrical Eng. topics
