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Volume 41 Issue 12
Dec.  2015
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Journal of Beijing University of Aeronautics and Astronautics  > 2015  >  41(12): 2250-2255.
HAN Yanju, YANG Ke, ZHENG Hongyaoet al. Modified wide temperature compensation method for analog TCXO[J]. Journal of Beijing University of Aeronautics and Astronautics, 2015, 41(12): 2250-2255. doi: 10.13700/j.bh.1001-5965.2015.0003(in Chinese)
Citation: HAN Yanju, YANG Ke, ZHENG Hongyaoet al. Modified wide temperature compensation method for analog TCXO[J]. Journal of Beijing University of Aeronautics and Astronautics, 2015, 41(12): 2250-2255. doi: 10.13700/j.bh.1001-5965.2015.0003(in Chinese)
shu

Modified wide temperature compensation method for analog TCXO

doi: 10.13700/j.bh.1001-5965.2015.0003
  • 1.

    School of Electronic and Information Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China

  • 2. Beijing Institute of Metrology and Measurement, Beijing 100854, China

  • Received Date: 04 Jan 2015
  • Rev Recd Date: 12 Feb 2015
  • Publish Date: 20 Dec 2015
    Abstract
  • When the temperature frequency stability of the temperature compensated crystal oscillator (TCXO) is required better than ±1×10-6 in a wide temperature range, the rate of once success for the traditional compensation method is low. The compensation precision influences were carefully analyzed, and the reasons were drawn that the measurement method and the calculation model of the thermistors within the temperature compensation network caused the higher tolerance. So a modified wide temperature compensation method was provided. At first, the reference thermistors were measured on-line in the wide temperature range to obtain the practical data. Secondly, the thermistors for using were proportionally modeled according to the reference thermistors measurement data to acquire the resistance for each temperature. At last, the modeled thermistors were input into the temperature compensation program, and the genetic algorithm was used to compute the optimized network parameters. The contrast tests were carried out, and show that the thermistor values with new modeling method are closer to the test values than those with the traditional method, the compensation program is more flexible, and the rate of once success for temperature compensation is improved more than 90%.

     

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