Oven controlled crystal oscillator (OCXO) with acceleration compensation

A technology of constant temperature crystal oscillation and acceleration sensor, which is applied in power oscillators, electrical components, etc., can solve problems such as unstable performance of analog circuits, and achieve the effect of overcoming the influence of environmental temperature and wide application prospects

Inactive Publication Date: 2011-05-25
单庆晓
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  • Abstract
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Problems solved by technology

[0009] The invention adopts digital compensation technology and digital algorithm, which overcomes the shortcomings of analog circuits that are easily affected by ambient temperature and unstable performance, and has broad application prospects

Method used

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  • Oven controlled crystal oscillator (OCXO) with acceleration compensation
  • Oven controlled crystal oscillator (OCXO) with acceleration compensation
  • Oven controlled crystal oscillator (OCXO) with acceleration compensation

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Embodiment Construction

[0015] The constant temperature crystal oscillator (OCXO for short) generally has a temperature control circuit to precisely control the temperature of the crystal. The OCXO also has a voltage control circuit, and the output frequency can be adjusted by changing the voltage of the voltage control terminal. The present invention adds an acceleration compensation part inside the OCXO, which mainly includes a three-dimensional MEMS acceleration sensor, a digital control circuit based on FPGA, and a digital-to-analog conversion circuit (D / A for short). An OCXO with acceleration compensation consists of figure 1 shown.

[0016] OCXOs have an inherent acceleration-sensitive direction that is determined and available through test methods. Let the angle between this direction and the x, y, z axes be mistake! Reference source not found. . Suppose the three-dimensional MEMS acceleration sensor detects the acceleration in three directions in real time, and the three-axis accelerati...

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Abstract

The invention relates to an oven controlled crystal oscillator (OCXO) with acceleration compensation. An acceleration compensation part is added into an internal part of the OCXO provided by the invention, wherein the part mainly comprises a three-dimensional MEMS (Micro Electro Mechanical System) acceleration transducer, a FPGA (Field-programmable Gate Array)-based digital controlled circuit and a digital-to-analog converter circuit. The OCXO provided by the invention is realized by using digital compensation techniques through digital algorithm, and disadvantages that an analog circuit is easily influenced by the environment temperature and has unstable performance are overcome, so that the OCXO provided by the invention has broad application prospect.

Description

technical field [0001] The invention performs vibration compensation on the constant temperature crystal oscillator, and is applied to occasions requiring high-precision frequency references, especially in vibration environments; such as airborne precision electronic equipment, spacecraft precision electronic equipment and various motion carriers. precision electronic equipment. Background technique [0002] The constant temperature crystal oscillator (OCXO) is widely used in various occasions requiring high-precision frequency reference due to its stable output frequency. Since the quartz crystal oscillator is sensitive to acceleration, the output frequency changes in a vibrating environment, and the phase noise increases, degrading the performance of electronic equipment. [0003] At present, people have made research on the mechanical structure, and adopted various buffering techniques in the machinery to reduce the impact of the impact on the crystal oscillator. Howeve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03B5/04
Inventor 单庆晓
Owner 单庆晓
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