基于Chip-on-TEC的高精度晶体振荡器研究  

Research on the quartz crystal oscillator with high frequency stability based on Chip-on-TEC method

作　　者：刘文林 宋玉琢 魏文菲 吕强 徐建 陈明祥[3] 黄大勇 LIU Wenlin;SONG Yuzhuo;WEI Wenfei;LYU Qiang;XU Jian;CHEN Mingxiang;HUANG Dayong(School of Electrical and Electronic Engineering,Wuhan Polytechnic University,Wuhan 430023,China;School of Electronic and Information Engineering,South-Central Minzu University,Wuhan 430074,China;School of Mechanical Science and Engineering,Huazhong University of Science and Technology,Wuhan 430074,China;TKD Science and Technology Co.,Ltd.,Suizhou 441300,Hubei Province,China)

机构地区：[1]武汉轻工大学电气与电子工程学院,湖北武汉430023 [2]中南民族大学电子信息工程学院,湖北武汉430074 [3]华中科技大学机械科学与工程学院,湖北武汉430074 [4]泰晶科技股份有限公司,湖北随州441300

出　　处：《电子元件与材料》2024年第5期612-616,共5页Electronic Components And Materials

基　　金：国家自然科学基金(61404095);湖北省重点研发计划(2021BAA213)。

摘　　要：提高晶体振荡器频率稳定度的首要手段是保持温度的稳定。基于热电制冷器具有的恒温特性,采用Chip-on-TEC方法,给出了一种高精度的晶体振荡器的设计方案。利用多物理仿真软件,针对商用的音叉型石英晶体,首次建立了32.768 kHz石英晶片的完整的有限元多物理场仿真模型。仿真结果表明,晶体的谐振频率与商用产品完全相同;基于TEC的晶体振荡器设计方案可以使得晶片温度变化低至0.008℃,对应的频率稳定度5.4×10^(-9)。考虑到高精度切型晶片材料的非易得性,所给出的方案为采用低精度切型晶片设计高精度的晶体振荡器提供了思路。The primary means of improving frequency stability of a crystal oscillator is to maintain a stable temperature.Based on the constant temperature characteristics of thermoelectric coolers,a high-precision crystal oscillator design was proposed by using the Chip-on-TEC method.By using multi-physics simulation software,a complete finite element multiphysics simulation model was established for a 32.768 kHz quartz tuning fork.The simulation results show that the resonant frequency of the quartz crystal is exactly the same as that of commercial products.The temperature difference is as low as 0.008℃,and the corresponding frequency stability is only 5.4×10^(-9).The proposed method provides a direction for designing high stability crystal oscillators using low-precision cut type quartz crystals,which addresses the difficulty in obtaining high-precision cut-type crystal materials.

关 键 词：石英晶体 音叉谐振器 谐振频率 有限元 多物理场仿真 

分 类 号：TN752[电子电信—电路与系统] TB657[一般工业技术—制冷工程]