Crystal Oscillators MCQ

Test your knowledge with important Crystal Oscillators MCQ and their applications. These MCQs are beneficial for competitive exams too. Explore 30+ more Crystal Oscillators MCQs on Bissoy. Bissoy App

• The equivalent circuit of a quartz crystal has LCR arm capacitance of 12nF and inductance of 3mH and parallel arm capacitance of 4nF. Parallel resonant frequency for the circuit is:
  ক

  3 MHz

  খ

  0.3 MHz

  গ

  6 MHz

  ঘ

  9 MHz
• Parallel resonant frequency of quartz crystal is given by:
  ক

  1/ √(LCₒC/(Cₒ+C))

  খ

  1/√LC

  গ

  1/√LCₒ

  ঘ

  1/ √(L(Cₒ+C) )
• In the equivalent circuit of a quartz crystal, LCR arm has an inductance of 4 mH and capacitor has a value of 4nF, then the series resonant frequency of the oscillator is:
  ক

  0.25 MHz

  খ

  2.5 MHz

  গ

  25 MHz

  ঘ

  5 MHz
• In the plot of reactance v/s frequency of a crystal oscillator, the reactance between series resonant frequency and parallel resonant frequency is:
  ক

  capacitive

  খ

  inductive

  গ

  both capacitive and inductive

  ঘ

  none of the mentioned
• Quartz crystal is used in the _______region, where the operating point of the crystal is fixed.
  ক

  resistive

  খ

  inductive reactance

  গ

  capacitive reactance

  ঘ

  none of the mentioned
• A quartz crystals equivalent circuit is a series LCR circuit and has a series resonant frequency.
  ক

  true

  খ

  false
• Quartz crystal and tourmaline used in oscillators work on the principle of:
  ক

  photo electric effect

  খ

  piezo electric effect

  গ

  Raman effect

  ঘ

  black body radiation
• Quartz crystals are more efficient as a feedback network because:
  ক

  less circuit complexity

  খ

  cost effective

  গ

  crystals operate at high voltage levels

  ঘ

  LC circuits have unloaded Q of a few hundreds
• In an oscillator, the resonant feedback circuit must have must have a low Q in order to achieve stable oscillation.
  ক

  true

  খ

  false
• One condition to be satisfied in an oscillator circuit so that stable oscillations are produced is:
  ক

  positive feedback is to be achieved

  খ

  negative feedback is to be achieved

  গ

  1800 phase shift is required between the transistor input and output.

  ঘ

  none of the mentioned