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脉冲调制型恒温差风速计控制电路的设计及其温漂特性测试

Design and Temperature Drift Test of Pulse Modulation Constant Temperature Difference(CTD) Control Circuit of Thermal Flow Sensor
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摘要 为了实现风速计良好的恒温差控制,控制回路中的放大器需要有大增益,但大增益又会引起自由振荡的问题,本文介绍了解决这种自由振荡问题的方案,即脉冲调制型恒温差控制电路的工作原理及设计.在实际应用中,这个电路的最大缺陷就是输出温漂较大,因此本文对该电路的温漂特性也进行了详细的测试,文章最后给出了结论. To realize a better control of the thermal flow sensor, a high-gain amplifier is needed in the control loop. However, in high-gain situation, the control loop may work in free oscillation mode. To conquer this disadvantage, the theoretic analysis and the design of a resolution is given, namely pulse modulation mode. The most important vice of this circuit is that it＇s output has a large temperature drift, thereby the detail of this property in test is give here. Conclusion is given at the end of this paper.
作者 丁高飞 秦明 沈广平
机构地区 东南大学MEMS教育部重点实验室
出处 《传感技术学报》 CAS CSCD 北大核心 2006年第05A期1570-1572,共3页 Chinese Journal of Sensors and Actuators
基金 国家自然科学基金重点项目(90607002) 教育部新世纪人才计划资助项目
关键词 CMOS 热流量风速计 恒温差 脉冲调制 温漂 CMOS thermal flow sensor constant temperature difference pulse modulation temperature drift
分类号 TN409 [电子电信—微电子学与固体电子学]
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参考文献10

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二级参考文献14

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传感技术学报
2006年 第05A期

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