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Space-applicable compensated quartz crystal oscillator and compensation method

A quartz crystal and crystal oscillation technology, applied in the field of compensation of compensation type quartz crystal oscillators and compensation type quartz crystal oscillators, can solve problems such as quality level improvement, and achieve high stability, high reliability and low power consumption. Effect

Active Publication Date: 2022-06-17
武汉海创电子股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the reliability design and guarantee of device selection, circuit structure, and control algorithm to improve the frequency-temperature stability index and improve the quality level are currently difficult problems in the industry.

Method used

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  • Space-applicable compensated quartz crystal oscillator and compensation method
  • Space-applicable compensated quartz crystal oscillator and compensation method
  • Space-applicable compensated quartz crystal oscillator and compensation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0096] Embodiment 1, when the temperature acquisition circuit 6 adopts an integrated high-resolution digital temperature sensor (integrated temperature sensor), such as figure 2 shown:

[0097] The inlet power supply circuit 1 is to set the primary large capacitor filter at the power inlet, which can effectively improve the power supply ripple and improve the EMC anti-interference level.

[0098] The digital part voltage regulator circuit 2 and the analog part voltage regulator circuit 3 realize the distribution and isolation of the digital power supply and the analog power supply by adding two voltage regulators and filter capacitors after the inlet power supply circuit 1; The level of the digital circuit part is stable to ensure the reliable flipping of various digital gates; for the analog circuit part, it can effectively isolate the stray caused by the digital circuit and improve the spectral purity of the crystal frequency signal output.

[0099] The crystal oscillator ...

Embodiment 2

[0107] Embodiment 2, the temperature acquisition circuit 6 adopts a discrete simple thermistor voltage divider structure (discrete temperature sensing device), such as image 3 shown:

[0108] Except that the temperature acquisition circuit 6 adopts a discrete simple thermistor voltage dividing structure, other circuit schemes are similar or the same as scheme 1.

[0109] The temperature acquisition circuit 6 adopts a discrete simple thermistor voltage divider structure, which is a solution that is easier to meet the requirements of space applications; the thermistor is a single discrete device, which is easier to obtain than an IC with a higher degree of integration. It is a device qualified for quality assurance; because the thermistor voltage divider structure can only obtain a voltage curve that changes with temperature when the temperature changes, it is an analog quantity. At this time, only the analog quantity can be input to the AD port corresponding to the DSP to real...

Embodiment 3

[0110] Embodiment 3, the vacant scheme of the frequency conversion output circuit, such as Figure 4 shown:

[0111] Except for leaving the frequency conversion output circuit 8 empty, the other circuit schemes can be similar or the same as scheme 1 or scheme 2.

[0112] When the high-stable frequency provided by the crystal oscillator circuit 4 is the same as the final output frequency, the frequency conversion output circuit 8 can be left empty, and the frequency output terminal of the crystal oscillator circuit 4 and the external OUT terminal can be directly connected across the empty frequency conversion output circuit 8.

[0113]The algorithm of the present invention includes a temperature-frequency approximation algorithm, a loop detection and re-compensation algorithm, a multi-point temperature-frequency error fitting algorithm, a temperature-frequency multi-channel automatic compensation algorithm, a special temperature interval to prevent frequency overshoot predictio...

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Abstract

The invention discloses a space-applicable compensation type quartz crystal oscillator, which relates to the field of quartz crystal oscillators. It includes the entrance power supply circuit, the digital part of the voltage stabilization circuit, the analog part of the voltage stabilization circuit, the crystal oscillator circuit, the voltage control voltage modulation circuit, the temperature acquisition circuit, the digital processing circuit, the frequency conversion output circuit; the entrance power supply circuit and the digital part of the voltage stabilization circuit respectively It is connected with the analog part of the voltage stabilizing circuit; the digital part of the voltage stabilizing circuit is connected with the temperature acquisition circuit and the digital processing circuit respectively; the analog part of the voltage stabilizing circuit is connected with the crystal oscillator circuit and the voltage control voltage modulation circuit respectively; the temperature acquisition circuit is an integrated temperature sensor Or a discrete temperature-sensing device; the quartz crystal oscillator of the present invention selects electronic original devices with low power consumption, low noise, high stability and high reliability. The invention also relates to a compensation method for the space-applicable compensation type quartz crystal oscillator.

Description

technical field [0001] The invention relates to the field of quartz crystal oscillators, more specifically, it is a compensation type quartz crystal oscillator that can be applied in space, and also relates to a compensation method for the compensation type quartz crystal oscillator that can be applied in space. Background technique [0002] With its unique frequency characteristics, quartz crystal oscillators undertake various important functions such as timekeeping, synchronization, and measurement in modern electronic circuits. [0003] With the development of various industries, the demand for crystal oscillator indicators is also increasing, such as miniaturization, high stability, and low power consumption. [0004] However, reliability design and guarantee in device selection, circuit structure, and control algorithm can improve the frequency-temperature stability index and improve the quality level, which is the current problem in the industry. SUMMARY OF THE INVEN...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03B5/04H03B5/32H03H9/19
CPCH03B5/04H03B5/32H03H9/19
Inventor 黎子龙毛晶张文捷刘斯迪张凡王圣伟丁凡
Owner 武汉海创电子股份有限公司