Linear Integrated Circuit MCQ

Test your knowledge with important Linear Integrated Circuit MCQ and their applications. These MCQs are beneficial for competitive exams too. Explore 30 + more Linear Integrated Circuit MCQs at Bissoy

• Determine the work done by the intercom system depending on the position of the switch
  ক

  Remote speaker act as microphone

  খ

  Master speaker act as microphone

  গ

  Remote and master speaker act as microphone

  ঘ

  None of the mentioned
• 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.
  ক

  1880

  খ

  1750

  গ

  1370

  ঘ

  1580
• Which amplifier provides twice output swing as that of LM380 amplifier?
  ক

  Hybrid power amplifier

  খ

  Bridge power audio amplifier

  গ

  Monolithic power audio amplifier

  ঘ

  Dual power amplifier
• Bridge power audio amplifier can deliver power upto
  ক

  Twice as much as output of single LM380 amplifier

  খ

  Thrice as much as output of single LM380 amplifier

  গ

  Four times as much as output of single LM380 amplifier

  ঘ

  Half of the output of single LM380 amplifier
• Which among the following is ideal for consumer applications?
  ক

  NE5018

  খ

  LM380

  গ

  MC1408

  ঘ

  SE5018
• Find the IC that can be used for short circuit proof protection?
  ক

  All of the mentioned

  খ

  IC LM384

  গ

  ICL8063

  ঘ

  ICLM380
• Burr-Brown 3553 power amplifier is suited for
  ক

  Line driving applications

  খ

  Power supply requirement

  গ

  Bandwidth adjustments

  ঘ

  High frequency application
• What is the power dissipation of power transistor?
  ক

  ≅ 0.5W

  খ

  ≤ 0.5W

  গ

  > 0.5W

  ঘ

  ≠ 0.5W
• Which type of power transistor is chosen for a discrete power booster?
  ক

  Collector follower stage

  খ

  Emitter follower stage

  গ

  Base follower stage

  ঘ

  None of the mentioned
• Output current in general purpose op-amp can be increased using
  ক

  Power comparator

  খ

  Power amplifier

  গ

  Power resistor

  ঘ

  Power booster
• Find the lock-in range of monolithic Phase-Locked Loop from the given diagram.
  ক

  -fo-△fL to fo-△fL

  খ

  -fo-△fL to -fo-△fC

  গ

  fo-△fL to fo-△fC

  ঘ

  -fo-△fC to fo-△fC
• Determine the capture range of IC PLL 565 for a lock-in range of ± 1kHz.
  ক

  △fc = ±31.453Hz

  খ

  △fc = ±66.505Hz

  গ

  △fc = ±87.653Hz

  ঘ

  None of the mentioned
• Find out the incorrect statement. Monolithic phase detector is preferred for critical applications as it is: 1. Independent of variation in amplitude 2. Independent of variation in duty cycle of the input waveform 3. Independent of variation in response time
  ক

  1 & 2

  খ

  1 & 3

  গ

  2 & 3

  ঘ

  1, 2 & 3
• Given fo = 1.2kHz and V = 13v, find the lock-in range of monolithic Phase-Locked Loop.
  ক

  ±575Hz

  খ

  ±720Hz

  গ

  ±150Hz

  ঘ

  ±1kHz
• What is the conversion ratio of the phase detector in 565 PLL?
  ক

  0.14

  খ

  0.35

  গ

  0.4458

  ঘ

  0.7
• Find the value of Rsc, L and Co for a µA7840 switching regulator to provide +5 v at 3A, using the following specifications: toff= 24µs, ripple voltage = 400mA and ton=26µs.
  ক

  Rsc = 55 mΩ , L = 25µH & Co = 750µF

  খ

  Rsc = 550 mΩ , L = 25µH & Co = 75µF

  গ

  Rsc = 650 mΩ , L = 25µH & Co = 65µF

  ঘ

  Rsc = 720 mΩ , L = 25µH & Co = 250µF
• Which is the most commonly used low voltage switching regulators?
  ক

  Powdered Permalloy toroids

  খ

  Fermite EI, U and toroid cores

  গ

  Silicon steel EI butt stacks

  ঘ

  None of the mentioned
• Which of the following is considered to be the most important components of the switching regulator?
  ক

  RC or RLC filter

  খ

  RL or RLC filter

  গ

  ORC or RL filter

  ঘ

  RC, RLC or RL filter
• Filter used in switching regulator’s are also as called
  ক

  DC – AC transformers

  খ

  AC – DC transformers

  গ

  DC transformer

  ঘ

  AC transformer
• What should be the frequency range of pulse generator?
  ক

  250 kHz

  খ

  40 kHz

  গ

  120 kHz

  ঘ

  20 kHz
• Which among the following act as a switch in switching regulator?
  ক

  Rectifiers

  খ

  Diode

  গ

  Transistors

  ঘ

  Relays
• What are the conditions to be satisfied by a voltage source for using it in switching regulator. i. It must supply the required output power and the losses associated with the switching regulator ii. It must be large enough to supply sufficient dynamic range line and load variations iii. It must be sufficient high to meet the minimum requirement of the regulator system to be designed iv. It may be required to store energy for a specified amount of time during power failure especially if the system is designed for a computer power supply.
  ক

  i and iii

  খ

  i, ii, iii and iv

  গ

  ii, iii and iv

  ঘ

  i, iii and iv
• The switching regulators can operate in
  ক

  Step up

  খ

  Step down

  গ

  Polarity inverting

  ঘ

  All the mentioned
• A series switching regulators
  ক

  Improves the efficiency of regulators

  খ

  Improves the flexibility of switching

  গ

  Enhance the response of regulators

  ঘ

  All of the mentioned
• Linear series regulators are suited for application with
  ক

  High current

  খ

  Medium current

  গ

  Low current

  ঘ

  None of the mentioned
• Fixed voltage regulators and adjustable regulators are often called as
  ক

  Series dissipative regulators

  খ

  Shunt dissipative regulators

  গ

  Stray dissipative regulators

  ঘ

  All the mentioned
• What is done in switching regulators to minimize its power dissipation during switching?
  ক

  Uses external transistor

  খ

  Uses 1mH choke

  গ

  Uses external transistor and 1mH choke

  ঘ

  None of the mentioned
• Which of the following is not a characteristic of adjustable voltage regulators?
  ক

  Non-versatile

  খ

  Better performance

  গ

  Increased reliability

  ঘ

  None of the mentioned
• Compute the input voltage of 7805c voltage regulator with a current source that will deliver a 0.725A current to 65Ω, 10w load. (Assume reference voltage =5v)
  ক

  Vin = 84v

  খ

  Vin = 34v

  গ

  Vin = 54v

  ঘ

  Vin = 64v
• Calculate the output voltage for LM314 regulator. The current IADJ is very small in the order of 100µA. (Assume VREF=1.25v)
  ক

  17.17v

  খ

  34.25v

  গ

  89.34v

  ঘ

  23.12v