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Question 445

Which of the following ensures that a crystal oscillator operates on the frequency specified by the crystal manufacturer?

  1. Provide the crystal with a specified parallel inductance
  2. Provide the crystal with a specified parallel capacitanceCorrect answer
  3. Bias the crystal at a specified voltage
  4. Bias the crystal at a specified current

Explanation

A crystal cut for parallel resonance is calibrated by the manufacturer with a stated load capacitance across it. Providing that specified parallel capacitance in the circuit puts the crystal on its marked frequency; a different load pulls the frequency slightly off.

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Question 445: Which of the following ensures that a crystal oscillator… · FCC Amateur Extra Class (Element 4) · Questena