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Crystal oscillator frequency compensation method and device

A crystal oscillator, frequency compensation technology, applied in the direction of output stability, electrical components, etc., can solve the problem of crystal oscillator output frequency offset, etc., to achieve the effect of maintaining frequency stability

Pending Publication Date: 2019-08-23
NANJING COLLEGE OF INFORMATION TECH
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Problems solved by technology

[0004] The purpose of the present invention is to overcome the deficiencies in the prior art, and propose a crystal oscillator frequency compensation method and device, which solves the technical problem of the crystal oscillator output frequency offset in the acceleration environment in the prior art

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  • Crystal oscillator frequency compensation method and device

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Embodiment Construction

[0022] The present invention will be further described below in conjunction with the accompanying drawings. The following examples are only used to illustrate the technical solution of the present invention more clearly, but not to limit the protection scope of the present invention.

[0023] A kind of crystal oscillator frequency compensation method of the present invention, see figure 2 shown, including the following process:

[0024] Step S1, obtaining the current acceleration loaded on the crystal oscillator;

[0025] Step S2, comparing the current acceleration with the acceleration-frequency relationship curve, and judging whether the current acceleration will affect the output frequency of the crystal oscillator; if it is judged that it will be affected, proceed to the next step; if it is judged that there is no effect, then return to step S1;

[0026] Step S3, determine the offset frequency caused by the current acceleration from the acceleration-frequency relationsh...

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Abstract

The invention discloses a crystal oscillator frequency compensation method and device. The method comprises: acquiring the current acceleration loaded on a crystal oscillator; comparing the current acceleration with an acceleration-frequency relation curve, and judging whether the current acceleration can influence the output frequency of the crystal oscillator or not; determining an offset frequency caused by the current acceleration according to the acceleration-frequency relation curve, wherein the offset frequency is recorded as a frequency to be compensated; inquiring a relation curve between the temperature of the crystal oscillator and the output frequency, and determining a target temperature to be compensated; and adjusting the temperature of the crystal oscillator to the target temperature. The output of the compensated crystal oscillator is equivalent to the frequency output under the condition of no acceleration, so that the frequency compensation of the acceleration is finally realized, and the frequency of the crystal oscillator is kept stable.

Description

technical field [0001] The invention belongs to the technical field of crystal oscillators, and in particular relates to a frequency compensation method and device for a crystal oscillator. Background technique [0002] Aviation equipment generally uses the Global Satellite Positioning System (GPS) for navigation. The key component in the GPS system is a crystal oscillator. The crystal oscillator provides a clock signal as the frequency reference of the phase-locked loop components, and its frequency accuracy directly affects the positioning of the GPS signal. Accuracy. There are high-acceleration shocks in the environment of aviation equipment, and there are vibrations in the process of attitude adjustment during orbital operation, and crystal oscillators are highly sensitive to acceleration. Because of this sensitivity, there will be an offset in the output frequency of the crystal oscillator, and if this high acceleration persists, the accumulated offset can be a signifi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03L1/02
CPCH03L1/022
Inventor 孙敏王萌
Owner NANJING COLLEGE OF INFORMATION TECH
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