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An improved method of MCXO.

W Zhou1, Z Xuan, H Liu

  • 1Dept. of Meas. and Instrum., Xidian Univ., Xi'an.

IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
|February 2, 2008
PubMed
Summary
This summary is machine-generated.

A new method simplifies microcomputer- வெப்பநிலை-controlled crystal oscillators (MCXO) by altering clock signals, enhancing performance and eliminating the need for DDS chips. This innovation achieves excellent frequency-temperature stability across a wide temperature range.

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Area of Science:

  • Electrical Engineering
  • Physics
  • Materials Science

Background:

  • Microcomputer-controlled crystal oscillators (MCXO) are crucial for precise timing applications.
  • Existing MCXO designs often rely on complex components like Direct Digital Synthesis (DDS) chips.
  • Improving MCXO performance and structural simplicity is an ongoing challenge.

Purpose of the Study:

  • To develop a novel design method for MCXOs.
  • To enhance the performance and simplify the structure of MCXOs.
  • To eliminate the need for DDS chips in high-performance MCXOs.

Main Methods:

  • A new MCXO design method was developed.
  • Clock signal pulses of a microcomputer were deleted.
  • The phase of the clock signal was shifted.

Main Results:

  • The frequency-temperature stability of MCXOs was significantly improved.
  • DDS chips were successfully eliminated from the MCXO design.
  • MCXOs manufactured using this method demonstrated frequency-temperature stability ranging from +/-3x10(-8) to +/-2x10(-7) over -40 to +80 degrees C.

Conclusions:

  • The developed MCXO design method offers improved performance and structural simplicity.
  • This method provides satisfactory frequency-temperature stability without requiring DDS chips.
  • The new design is suitable for applications requiring stable frequency output over a wide temperature range.