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Temperature compensation method used for simulating temperature compensated crystal oscillator

A technology for simulating temperature compensation and crystal oscillators, applied in the field of temperature compensation, can solve the problem of low success rate of temperature compensation at one time, achieve the effect of improving the effect, increasing economic benefits, and improving reliability

Active Publication Date: 2014-04-09
BEIJING INST OF RADIO METROLOGY & MEASUREMENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a temperature compensation method for an analog temperature compensated crystal oscillator to solve the problem that the temperature compensation of an analog crystal oscillator has a low success rate once and the temperature compensation network needs to be adjusted multiple times, thereby reducing production cost, increase productivity

Method used

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  • Temperature compensation method used for simulating temperature compensated crystal oscillator
  • Temperature compensation method used for simulating temperature compensated crystal oscillator
  • Temperature compensation method used for simulating temperature compensated crystal oscillator

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Put the crystal oscillator in the incubator, adjust the control voltage of the varactor diode (23) in the crystal oscillator, so that the frequency of the crystal oscillator reaches the nominal value at each temperature point, and record the control voltage at each temperature point value, forming the voltage-temperature curve data for an uncompensated crystal oscillator.

[0037] The reference thermistor adopts an online test method, and the reference thermistor test circuit adopts a form similar to the temperature compensation network. Such as image 3 As shown, the input of this test circuit is applied with a fixed voltage V z , and select low and medium resistance thermistors as reference thermistors to connect to the positions of R5, R7 and R4 in the temperature compensation network respectively. During the online test of the thermistor, the online test can be roughly selected within the allowable range of the fixed resistance and the thermistor in the temperatur...

Embodiment 2

[0046] Put the crystal oscillator in the incubator, adjust the control voltage of the varactor diode (23) in the crystal oscillator, so that the frequency of the crystal oscillator reaches the nominal value at each temperature point, and record the control voltage at each temperature point value, forming the voltage-temperature curve data for an uncompensated crystal oscillator.

[0047] The reference thermistor adopts the online test method, and the reference thermistor test circuit adopts a form similar to the temperature compensation network, such as image 3 As shown, the input of this test circuit is applied with a fixed voltage V z , and select low and medium resistance thermistors as reference thermistors to connect to the positions of R5, R7 and R4 in the temperature compensation network respectively. During the online test of the thermistor, the online test can be roughly selected within the allowable range of the fixed resistance and the thermistor in the temperatur...

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Abstract

The invention relates to a temperature compensation method used for simulating a temperature compensated crystal oscillator. The method includes the steps that a voltage temperature curve of an uncompensated crystal oscillator is measured; resistance temperature characteristics of a thermistor are measured and taken for reference; according to the voltage temperature curve of the uncompensated crystal oscillator and the resistance temperature characteristics of the thermistor, temperature compensation network parameter values are calculated and optimized; according to the calculated and optimized temperature compensation network parameter values, matched components are selected, and a temperature compensation network is constructed; temperature compensation is performed on the crystal oscillator through a temperature compensation network, and frequency temperature characteristics of the compensated crystal oscillator are measured. With the method, the temperature compensation effect of the temperature compensated crystal oscillator is effectively improved, particularly, the temperature compensation effect in a wide working temperature range is improved, the first time success rate of temperature compensation and the reliability of the temperature compensated crystal oscillator are improved, the production cost and the adjusting complexity of the temperature compensated crystal oscillator are reduced, and the production efficiency is improved.

Description

technical field [0001] The invention relates to a temperature compensation method, in particular to a temperature compensation method for simulating a temperature compensation crystal oscillator. Background technique [0002] Analog temperature compensated crystal oscillators are widely used in communication, navigation, satellite and other fields due to their high quality and low price. Under harsh environmental conditions, the working temperature range exceeds -30°C ~ +60°C, and the frequency temperature stability is required to reach ±1×10 -6 Generally, after installing the temperature compensation network for the first time, two or three adjustments of the compensation network parameters are required to make the frequency and temperature stability of the crystal oscillator meet the index requirements, which will cause waste of components and prolong the production cycle. [0003] Therefore, it is necessary to provide a compensation method for an analog temperature-compe...

Claims

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Application Information

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IPC IPC(8): H03L1/02
Inventor 韩艳菊杨科郑红耀于德江
Owner BEIJING INST OF RADIO METROLOGY & MEASUREMENT
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