Patent
High-precision microcomputer compensation crystal oscillator
Liu Yang,Gao Baoling,Wang Junjie,Rui Guo,Gu Xun,Mo Yanjie,Lei Xu,Yu Qi +7 more
- 21 Dec 2016
5
TL;DR: In this paper, a high-precision microcomputer compensation crystal oscillator based on an artificial neural network algorithm was proposed, which is used for generating a non-linear compensation voltage under program control of the microprocessor.
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Abstract: The invention belongs to the field of integrated circuits, and particularly relates to a high-precision microcomputer compensation crystal oscillator based on an artificial neural network algorithm. The high-precision microcomputer compensation crystal oscillator comprises a control PC, a control voltage generating module and a crystal oscillation module, wherein the control voltage generating module is composed of a microprocessor, a D/A device, a A/D device, a temperature sensor and a frequency meter, and is used for generating a non-linear compensation voltage under program control of the microprocessor; and the microprocessor adopts the artificial neural network algorithm to generate the non-linear compensation voltage. The high-precision microcomputer compensation crystal oscillator generates the control voltage required by both ends of a varactor by utilizing the artificial neural network algorithm, trains an artificial neural network so that the artificial neural network is capable of approximating a nonlinear function at high precision, thus the control voltage non-linearly depending upon temperature is generated; and the control voltage performs accurate compensation for the deviation of frequencies of a TCXO and a VCTCXO caused by temperature variation through controlling a capacitance value of the varactor, and significantly improves the frequency stability of the TCXO and the VCTCXO.
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Citations
Patent
Temperature-compensated crystal oscillator based on digital circuit
Peng Ye,Tan Feng,Liu Xingqi,Duyu Qiu,Lianping Guo,Kuojun Yang,Zhang Qinchuan,Huiqing Pan +7 more
- 28 Dec 2017
TL;DR: In this paper, a closed-loop compensation architecture is employed to realize the high precision compensation of the crystal oscillator, where the output frequency f(T) of the TCXO to be compensated is directly connected with the compensation voltage Vc(T).
2
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Liu Yang,Zhang Caizhi,Liu Yanchen,Cao Longbing,Qian Hebing +4 more
- 22 Dec 2017
TL;DR: In this article, an active complex filter based on a neural network is proposed for learning a filter output signal converted by an analog-digital converter ADC under different temperatures and technological angles to acquire a weighted value capable of adjusting a filter unit, and then adjustment on the filter unit is achieved when the same temperature and technological angle are met, and a signal is output stably.
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Analog compensation-based temperature compensation high-frequency crystal oscillator
Tan Feng,Li Yang,Qiu Duyu,Ye Peng,Lianping Guo,Zeng Hao,Pan Huiqing,Dai Changming +7 more
- 17 Oct 2017
TL;DR: In this paper, an analog compensation-based temperature compensation high-frequency crystal oscillator, where a closed-loop feedback compensation framework is adopted, is presented, where the output signals of a voltage-controlled crystal oscillators are divided into two paths by a power divider, wherein one path of signals is input into a frequency deviation calculation module.
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Temperature-compensated crystal oscillator based on analog circuit
Tan Feng,Duyu Qiu,Peng Ye,Jiquan Chen,Lianping Guo,Hao Zeng,Shuo Zhang,Ke Tang +7 more
- 11 Jan 2018
TL;DR: In this article, a temperature compensated crystal oscillator based on an analog circuit adopts the closed-loop feedback compensation architecture, an output signal is divided into two paths, wherein one path is input into a frequency-voltage conversion circuit; a voltage signal corresponding to the current temperature point is obtained according to the output frequency of a voltage-controlled crystal oscillators, the voltage signal is subtracted from the reference voltage through the voltage comparison circuit, and then amplified to obtain a compensate voltage signal; the compensate voltage signals are filtered through a filter, and fed back to a voltage
1
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Digital temperature compensation method of crystal oscillator
Tan Feng,Ye Peng,Qiu Duyu,Zhao Yong,Jiang Jun,Huang Wuhuang,Yang Kuojun,Ke Tang +7 more
- 17 Oct 2017
TL;DR: In this article, a closed-loop feedback compensation framework is adopted for temperature compensation in a VCXO, where the frequency deviation related to the temperature in real time is directly converted into a binary code which is in one-to-one correspondence with the temperature.
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