WorksheetsQuiz 1: 20EC007 Linear Integrated Circuits
Total questions: 20
Worksheet time: 20mins
A pressure sensor with very high output impedance produces a low-level voltage signal. When connected directly to the load, the signal amplitude drops significantly. The system requires accurate signal transfer without amplification. Which op-amp configuration is MOST suitable for this application?
Inverting amplifier
Differential amplifier
Voltage follower
Comparator
A differential amplifier has two input voltages V1=2.5 V and V2=1.5 V. The amplifier is designed to amplify only the difference between the inputs. Which of the following correctly represents the quantity being amplified?
V1+V2
(V1+V2)/2
V1−V2
V1×V2
A differential amplifier receives V1=3 V and V2=3 V. What will be the output (ideal case)?
Positive saturation
Negative saturation
Zero
Equal to 3 V
A temperature sensor produces a low-level voltage and cannot supply sufficient current to the next stage without signal distortion. To transfer the signal accurately without changing its amplitude, which op-amp configuration should be used?
Inverting amplifier
Differential amplifier
Voltage follower
Comparator
In an industrial measurement system, the same electrical noise appears on both input terminals of an op-amp along with the desired signal. Which parameter of the op-amp ensures that this noise is effectively rejected?
Slew rate
Open-loop gain
Common Mode Rejection Ratio (CMRR)
Bandwidth
Which of the following is the major advantage of Integrated Circuits over discrete circuits?
Larger size
Increased power consumption
Increased system reliability
Need for more soldered joints
The active components in an IC are:
Resistors and capacitors
Capacitors and inductors
Transistors and diodes
Resistors and inductors
Which of the following is NOT a standard op-amp package?
Metal can
Dual-in-line package
Flat package
Ceramic capacitor package
In a DC-coupled multi-stage amplifier, the output does not remain zero even when the input signal is zero due to DC level shifts between stages. Which block inside the op-amp helps overcome this issue?
Differential amplifier
Output buffer
Level shifter (translator)
Frequency compensator
An outdoor op-amp circuit shows gradual change in output voltage with temperature variation throughout the day. This effect is best described as:
Slew rate limitation
Frequency roll-off
Thermal drift
Input offset current
Which pin of µA741 is used for output?
Pin 2
Pin 3
Pin 6
Pin 7
Input bias current is defined as:
Difference of input currents
Average of input currents
Sum of input currents
D. Output current
Thermal drift refers to change in op-amp parameters with:
Frequency
Supply voltage
Load current
Temperature
Which resistor is used to compensate input bias current?
Load resistor
Feedback resistor
Rcomp
Offset null resistor
CMRR is defined as the ratio of:
ACM / ADM
ADM / ACM
Output voltage / input voltage
Slew rate / bandwidth
Slew rate is specified in:
Hz
V
V/μs
A/μs
A slew rate of 1 V/μs means output changes by:
1 V in 1 s
1 V in 1 ms
1 V in 1 μs
1 mV in 1 μs
To ensure stable operation of an op-amp at higher frequencies, an RC network is intentionally added to introduce a dominant pole. This technique is called:
Slew rate control
Internal compensation
External frequency compensation
Feedback attenuation
A temperature sensor produces an output voltage of 0.25 V. The signal is passed through a voltage follower before feeding a data acquisition system. What is the output voltage of the voltage follower?
0 V
0.125 V
0.25 V
0.5 V
In μA741 op-amp, a capacitor fabricated internally between stages improves stability without external components. This type of compensation is known as:
Pole-zero compensation
Dominant pole compensation
Miller effect compensation
Thermal compensation
