Explore topic-wise MCQs in Linear Integrated Circuit.

This section includes 68 Mcqs, each offering curated multiple-choice questions to sharpen your Linear Integrated Circuit knowledge and support exam preparation. Choose a topic below to get started.

51.

WHICH_AMPLIFIER_PROVIDES_TWICE_OUTPUT_SWING_AS_THAT_OF_LM380_AMPLIFIER??$

A. Hybrid power amplifier
B. Bridge power audio amplifier
C. Monolithic power audio amplifier
D. Dual power amplifier
Answer» C. Monolithic power audio amplifier
Discussion
52.

IF_THE_OUTPUT_POWER_OF_AN_AMPLIFIER_IS_10_V,_AND_THE_INPUT_POWER_SUPPLIED_TO_THE_AMPLIFIER_IS_0.229_V_GIVEN_THAT_THE_DC_VOLTAGE_USED_IS_38.5_V,_EFFICIENCY_OF_THE_POWER_AMPLIFIER_IS:?$

A. 25%
B. 50%
C. 75%
D. 35%
Answer» B. 50%
Discussion
53.

A LM380 power amplifier is used in a intercom system with amplifier gain = 50 and the transformer turns ratio is given as 35.Find the overall gain of the circuit.$

A. 1880
B. 1750
C. 1370
D. 1580
Answer» B. 1750
Discussion
54.

If_a_power_amplifier_has_an_output_power_of_10_W,_and_an_amplifier_gain_of_16.4_dB,_then_the_input_drive_power_is:$

A. 400 mW
B. 225 mW
C. 229 mW
D. 240 mW
Answer» D. 240 mW
Discussion
55.

Behavior of a transistor in power amplifiers is unpredictable at all input signal levels?

A. True
B. False
Answer» C.
Discussion
56.

Power amplifiers in the increasing order of efficiency is:

A. Class A, B, C
B. Class C, A, B
C. Class B, A, C
D. Efficiency of all the 3 amplifiers is the same
Answer» B. Class C, A, B
Discussion
57.

Bridge power audio amplifier can deliver power upto

A. Twice as much as output of single LM380 amplifier
B. Thrice as much as output of single LM380 amplifier
C. Four times as much as output of single LM380 amplifier
D. Half of the output of single LM380 amplifier
Answer» D. Half of the output of single LM380 amplifier
Discussion
58.

A class B amplifier consists of _______ transistors in order to conduct the input signal over the entire cycle.

A. 1
B. 2
C. 4
D. 6
Answer» C. 4
Discussion
59.

Which among the following is ideal for consumer applications?

A. NE5018
B. LM380
C. MC1408
D. SE5018
Answer» C. MC1408
Discussion
60.

___________ amplifiers are linear circuits, where the transistor is biased to conduct over the entire range of the input signal cycle.

A. Class A amplifiers
B. Class B amplifiers
C. Class C amplifiers
D. None of the mentioned
Answer» B. Class B amplifiers
Discussion
61.

Find the IC that can be used for short circuit proof protection?

A. All of the mentioned
B. IC LM384
C. ICL8063
D. ICLM380
Answer» D. ICLM380
Discussion
62.

Gain of power amplifiers __________ with increase in operating frequency.

A. Increases
B. Decreases
C. Increases exponentially
D. Decreases exponentially
Answer» C. Increases exponentially
Discussion
63.

Burr-Brown 3553 power amplifier is suited for

A. Line driving applications
B. Power supply requirement
C. Bandwidth adjustments
D. High frequency application
Answer» B. Power supply requirement
Discussion
64.

Amplifier efficiency is the ratio of RF output power to DC input power. This parameter determines the performance of an amplifier.

A. True
B. False
Answer» B. False
Discussion
65.

What is the power dissipation of power transistor?

A. ‚âÖ 0.5W
B. ≤ 0.5W
C. > 0.5W
D. ≠ 0.5W
Answer» D. ‚Äö√Ñ√∂‚àö¬¢‚Äö√тĆ 0.5W
Discussion
66.

Important factors to be considered for power amplifier design are:

A. Efficiency
B. Gain
C. Thermal effect
D. All of the mentioned
Answer» E.
Discussion
67.

Which type of power transistor is chosen for a discrete power booster?

A. Collector follower stage
B. Emitter follower stage
C. Base follower stage
D. None of the mentioned
Answer» C. Base follower stage
Discussion
68.

Output current in general purpose op-amp can be increased using

A. Power comparator
B. Power amplifier
C. Power resistor
D. Power booster
Answer» E.
Discussion