Method and corresponding device for taming crystal oscillation frequency of time-keeping device

A technology of crystal oscillator frequency and equipment, applied in the direction of timing pulse, electronic timer, radio-controlled timer, etc., can solve the problems of time reporting differences, achieve the effects of avoiding accumulation, eliminating punctual errors, and reducing the volume of equipment

Inactive Publication Date: 2012-05-02
TECHTOTOP MICROELECTRONICS
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  • Summary
  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If this kind of timekeeping device with timekeeping error is used, the timekeeping difference in different regions will be different.

Method used

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  • Method and corresponding device for taming crystal oscillation frequency of time-keeping device
  • Method and corresponding device for taming crystal oscillation frequency of time-keeping device
  • Method and corresponding device for taming crystal oscillation frequency of time-keeping device

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Embodiment Construction

[0018] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0019] The technology or process in which the frequency characteristics of the tamed clock can be calibrated, compensated, and improved by an external clock signal with higher accuracy / stability is called "clock frequency taming". figure 1 It is a system diagram of a device for taming the crystal oscillator frequency of a timekeeping device by using a satellite navigation and positioning system. Antenna 101 receives satellite signals in the sky, satellite receiver 102 captures and tracks satellites and locates them, then outputs standard UTC (Universal Coordinated Time, Universal Coordinated Time) ...

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Abstract

The invention discloses a method and corresponding device for taming crystal oscillation frequency of a time-keeping device, which comprises the following steps of: step 1, acquiring the standard time pulse A that is located and output by a navigation satellite; step 2, acquiring the standard time pulse B output by device crystal oscillation fractional frequency; step 3, measuring the clock difference between the standard time pulse A and the standard time pulse B; and step 4, if clock difference exists between A and B, adjusting the crystal oscillation frequency of the device to make the clock difference be in the allowed scope. For the time-keeping equipment with pressure control and temperature compensating crystal oscillation or pressure control crystal oscillation, the frequency deviation of the corrected crystal oscillation can be detected in real time by the method provided by the invention to eliminate the time-keeping error caused by crystal oscillation frequency deviation and avoid accumulation of error. Therefore, the invention is suitable for various satellite navigation systems, such as GPS, Beidou first generation navigation satellite, Beidou second generation navigation satellite, GLONASS, GALILEO and other satellite navigation systems.

Description

technical field [0001] The invention relates to a method and a corresponding device for taming the crystal oscillator frequency of a timekeeping device by using a satellite navigation and positioning system. Background technique [0002] Punctuality is the ability to keep precise time. In order to obtain precise time, most of the timekeeping devices now use atomic clocks or high-precision constant temperature crystal oscillators to improve the ability of punctuality and make the system punctual and accurate. However, the cost of this solution is too high and the size is large, which is not conducive to product design. If the timing device uses a general voltage-controlled temperature-compensated crystal oscillator or a voltage-controlled crystal oscillator, then the accuracy and aging rate of the crystal oscillator frequency are key factors affecting the timing performance. If the crystal oscillator frequency of the timekeeping device deviates and the system timekeeping is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G04G7/02G04G3/02G04R20/02G04R40/00
Inventor 代敏赵成能许祥滨
Owner TECHTOTOP MICROELECTRONICS
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