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Linear Integrated Circuits Multiple Choice Questions | MCQs | Quiz

Linear Integrated Circuits Interview Questions and Answers
Practice Linear Integrated Circuits questions and answers for interviews, campus placements, online tests, aptitude tests, quizzes and competitive exams.

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•   Differential Amplifier
•   Op-Amp Internal Circuit - 1
•   Op-Amp Internal Circuit - 2
•   Op-Amp Internal Circuit - 3
•   Op-Amp Internal Circuit - 4
•   Integrated Circuits - 1
•   Integrated Circuits - 2
•   IC Chip Size & Circuit
•   Basic Planar Process - 1
•   Basic Planar Process - 2
•   Basic Planar Process - 3
•   Active & Passive IC - 1
•   Active & Passive IC - 2
•   Active & Passive IC - 3
•   Thin Film Technology
•   FET Fabrication
•   IC Package Type - 1
•   IC Package Type - 2
•   Data Sheets Interpreting - 1
•   Data Sheets Interpreting - 2
•   Ideal Operational Amplifier
•   Open Loop Op-Amp
•   Feedback Configurations
•   Voltage Series Amplifier - 1
•   Voltage Series Amplifier - 2
•   Voltage Shunt Amplifier
•   Multiple Op-Amp - 1
•   Multiple Op-Amp - 2
•   Input Offset Voltage - 1
•   Input Offset Voltage - 2
•   Input Offset Voltage - 3
•   Input Bias Current
•   Input Offset Current
•   Thermal Drift
•   Offset Voltage Effect
•   Noise
•   Rejection Ratio
•   Frequency Response
•   Non-Compensating Op-Amp
•   Open-Loop Voltage Gain-1
•   Open-Loop Voltage Gain-2
•   Circuit Stability
•   Slew Rate - 1
•   Slew Rate - 2
•   DC & AC Amplifiers
•   AC Amplifiers
•   Peaking Amplifier
•   Averaging Amplifier - 1
•   Averaging Amplifier - 2
•   Instrumentation Amplifier - 1
•   Instrumentation Amplifier - 2
•   Instrumentation Amplifier - 3
•   Op-Amp Equivalent Circuit
•   Voltage-Current Converter-1
•   Voltage-Current Converter-2
•   Current-Voltage Converter
•   Input Impedance Circuit
•   Log & Antilog Amplifier
•   Multiplier & Divider - 1
•   Multiplier & Divider - 2
•   Integrator - 1
•   Integrator - 2
•   Differentiator
•   Active Filters - 1
•   Active Filters - 2
•   1st Order Butterworth Filter
•   2nd Order Butterworth Filter
•   Higher Order Filters
•   Band Pass Filters
•   All Pass Filters
•   Sine Wave Oscillator - 1
•   Sine Wave Oscillator - 2
•   Sine Wave Oscillator - 3
•   Sine Wave Oscillator - 4
•   Square Wave Generator
•   Sawtooth Wave Generator
•   Comparator
•   Schmitt Trigger
•   Precision Type Comparator
•   Basic DAC Techniques - 1
•   Basic DAC Techniques - 2
•   A to D Converter - 1
•   A to D Converter - 2
•   DAC / ADC Specification
•   Clippers & Clampers
•   Peak Detector & Sampling
•   Monostable Multivibrator
•   Astable Multivibrator
•   Phase-Locked Loops
•   Phase Detector
•   Controlled Oscillator
•   PLL Applications
•   IC Voltage Regulator
•   Switching Regulator
•   Monolithic Phase Loop
•   Power Amplifiers

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Linear Integrated Circuit Questions and Answers – Open Loop Op-Amp Configuration

Posted on August 27, 2017 by staff10

This set of Linear Integrated Circuit Multiple Choice Questions & Answers (MCQs) focuses on “Open Loop Op-Amp Configuration”.

1. Open loop op-amp configuration has
a) Direct network between output and input terminals
b) No connection between output and feedback network
c) No connection between input and feedback network
d) All of the mentioned
View Answer

Answer: a
Explanation: In an open loop configuration, the output signal is not fed back in any form as part of the input signal and the loop that would have been formed with feedback is open.
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2. In which configuration does the op-amp function as a high gain amplifier?
a) Differential amplifier
b) Inverting amplifier
c) Non-inverting amplifier
d) All of the mentioned
View Answer

Answer: d
Explanation: An op-amp functions as a high gain amplifier when connected in open loop configuration. These three are the open loop configuration of an op-amp.

3. How does the open loop op-amp configuration classified?
a) Based on the output obtained
b) Based on the input applied
c) Based on the amplification
d) Based on the feedback network
View Answer

Answer: b
Explanation: Open loop configurations are classified according to the number of inputs used and the terminal to which the input is applied when a single input is used.

4. What will be the voltage drop across the source resistance of differential amplifier when connected in open loop configuration?
a) Zero
b) Infinity
c) One
d) Greater than one
View Answer

Answer: a
Explanation: The source resistances are normally negligible compared to the input resistance. Therefore, the voltage drop across input resistors can be assumed to be zero.

5. The output voltage of an open-loop differential amplifier is equal to
a) Double the difference between the two input voltages
b) Product of voltage gain and individual input voltages
c) Product of voltage gain and the difference between the two input voltages
d) Double the voltage gain and the difference between two input voltages
View Answer

Answer: c
Explanation: The output voltage is equal to the voltage gain times the difference between the two input voltages.
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6. Calculate the output voltage for the given circuit.
linear-integrated-circuit-mcqs-open-loop-op-amp-configuration-q6
a) Vo = 7v
b) Vo = 5.9v
c) Vo = 12v
d) Vo = 11.4v
View Answer

Answer: c
Explanation: The output voltage, Vo = A*(Vin1-Vin2).(Since, Rin1 and Rin2 are negligible compared to input resistance in open loop differential amplifier).
=> Vo = 4*(12v-9v) = 12v.

7. Find the output of inverting amplifier?
a) Vo = AVin
b) Vo = -AVin
c) Vo = -A(Vin1– Vin2)
d) None of the mentioned
View Answer

Answer: b
Explanation: In an inverting amplifier the input signal is amplified by gain A and is also inverted at the output. The negative sign indicates that the output voltage is of opposite polarity.

8. Determine the output voltage for the non-inverting amplifier input voltage 37µVpp sinewave. Assume that the output is a 741.
a) -7.44 Vpp sinewave
b) 74 Vpp sinewave
c) 7.4Vpp sinewave
d) 0.7 Vpp sinewave
View Answer

Answer: c
Explanation: The output voltage for non-inverting amplifier Vo = A*Vin = 200000 * 37µ = 7.4 Vpp sinewave.

9. Find the non-inverting amplifier configuration from the given circuit diagram?
linear-integrated-circuit-mcqs-open-loop-op-amp-configuration-q9
View Answer

Answer: c
Explanation: In a non-inverting amplifier, the input is applied to the non-inverting input terminal and the inverting terminal is connected to ground.

10. What happen if any positive input signal is applied to open-loop configuration?
a) Output reaches saturation level
b) Output voltage swing’s peak to peak
c) Output will be a sine waveform
d) Output will be a non-sinusoidal waveform
View Answer

Answer: a
Explanation: In open-loop configuration, due to very high gain of the op-amp, any input signal slightly greater than zero drives the output to saturation level.
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11. Why open-loop op-amp configurations are not used in linear applications?
a) Output reaches positive saturation
b) Output reaches negative saturation
c) Output switches between positive and negative saturation
d) Output reaches both positive and negative saturation
View Answer

Answer: c
Explanation: When operated in open loop, the output switches between positive and negative saturation levels. For this reason, open loop op-amp configurations are not used in linear applications.

Sanfoundry Global Education & Learning Series – Linear Integrated Circuits.

To practice all areas of Linear Integrated Circuits, here is complete set of 1000+ Multiple Choice Questions and Answers.

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