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Atomic frequency standard servo method with temperature compensation and circuit

An atomic frequency standard and temperature compensation technology, which is applied in the direction of electrical components and automatic power control, can solve the problems of low output accuracy of atomic frequency standard, unable to solve the problem of temperature change voltage-controlled crystal oscillator output change, etc., and achieve the output frequency Stable and Precise Effects

Active Publication Date: 2013-06-05
恒时益博(武汉)电子科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In a specific atomic frequency standard, since the output of the voltage-controlled crystal oscillator will be affected by temperature changes, the existing servo circuit composed of DDS and highly integrated processors cannot solve the problem caused by temperature changes. The problem of the output change of the voltage-controlled crystal oscillator causes the output accuracy of the atomic frequency standard to be low

Method used

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  • Atomic frequency standard servo method with temperature compensation and circuit
  • Atomic frequency standard servo method with temperature compensation and circuit
  • Atomic frequency standard servo method with temperature compensation and circuit

Examples

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Embodiment 1

[0050] An embodiment of the present invention provides an atomic frequency standard servo method with temperature compensation, see figure 2 , the method includes:

[0051] Step 101: Amplify the optical detection signal output by the physical unit of the atomic frequency standard, and perform synchronous phase detection on the amplified signal to obtain a deviation correction signal.

[0052] Specifically, the optical detection signal output by the physical unit of the atomic frequency standard is amplified, including:

[0053] Obtain the optical detection signal output by the physical unit of the atomic frequency standard;

[0054] The acquired photodetection signal is amplified by using an amplifying circuit of a differential instrument.

[0055] Step 102: Obtain the working environment temperature of the voltage-controlled crystal oscillator when the atomic frequency standard is working.

[0056] Specifically, a thermistor attached to the surface of the voltage-controll...

Embodiment 2

[0065] An embodiment of the present invention provides an atomic frequency standard servo circuit with temperature compensation, see image 3 , the circuit consists of:

[0066] Amplifying module 201, for amplifying the optical detection signal output by the physical unit of the atomic frequency standard;

[0067] The synchronous phase detection module 202 is used to perform synchronous phase detection on the signal amplified by the amplification module 201 to obtain a deviation correction signal;

[0068] The temperature acquisition module 203 is used to obtain the working environment temperature of the voltage-controlled crystal oscillator 200 when the atomic frequency standard is working;

[0069] A temperature compensation module 204, configured to convert the difference between the obtained working environment temperature and the reference working temperature into a compensation voltage;

[0070] The voltage-controlled conversion module 205 is configured to use the comp...

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PUM

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Abstract

The invention discloses an atomic frequency standard servo method with temperature compensation and a circuit and belongs to the field of atomic frequency standards. The method comprises the following steps. A light detecting signal output by a physical unit of a atomic frequency standard is amplified, and synchronous phase discrimination of the amplified signal is performed so as to obtain a deviation rectifying signal. A work environment temperature of a pressure controlled crystal oscillator is obtained when the atomic frequency standard works, and an obtained difference value of the work environment temperature and a reference work temperature is converted to be a compensate voltage. The compensate voltage is utilized for compensating for the deviation rectifying signal so as to obtain a pressure controlled voltage, and the pressure controlled voltage acts on the pressure controlled crystal oscillator. By converting the difference value of the work environment temperature and the reference work temperature to be the voltage when the pressure controlled crystal oscillator works, compensating for the voltage to the deviation rectifying signal so as to obtain the pressure controlled voltage and enabling the pressure controlled voltage to act on the pressure controlled crystal oscillator, influences on output frequency of the pressure controlled crystal oscillator by the work environment temperature are reduced, and frequency output by the pressure controlled crystal oscillator is stable and precise.

Description

technical field [0001] The invention relates to the field of atomic frequency standards, in particular to an atomic frequency standard servo method and circuit with temperature compensation. Background technique [0002] The wide application of digital integrated chips provides a prerequisite for building circuit modules with high integration and high precision. In the atomic frequency standard servo circuit, DDS (Direct Digital Synthesizer, direct digital frequency synthesizer) and highly integrated processors are used at home and abroad to complete the closed-loop work of the entire system. [0003] In the process of realizing the present invention, the inventor finds that there are at least the following problems in the prior art: [0004] In a specific atomic frequency standard, since the output of the voltage-controlled crystal oscillator will be affected by temperature changes, the existing servo circuit composed of DDS and highly integrated processors cannot solve th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03L7/26
Inventor 雷海东
Owner 恒时益博(武汉)电子科技有限公司
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