一种模拟输出CMOS温度传感器的设计与实现  

Design and implementation of an analog output CMOS temperature sensor

作　　者：马卓 熊晗 何茜 唐俊龙[1] 邹望辉 MA Zhuo;XIONG Han;HE Qian;TANG Junlong;ZOU Wanghui(School of Physics and Electronic Science,Changsha University of Science and Technology,Changsha 410114,China)

机构地区：[1]长沙理工大学物理与电子科学学院,湖南长沙410114

出　　处：《电子元件与材料》2023年第5期534-538,544,共6页Electronic Components And Materials

基　　金：国家自然科学基金(42204171);湖南省教育厅项目(20C0028)。

摘　　要：为了实现片上系统温度监测,设计了一款基于0.18μm CMOS工艺的模拟输出温度传感器,该温度传感器核心部分包括偏置电路和感温电路,辅助部分包括单位增益缓冲器电路和端口静电保护电路。偏置电路采用低压共源共栅电流镜结构,感温电路采用直接堆叠多个PNP管的方式,将外界温度转化为具有负温度系数的线性电压信号。再经过基于轨到轨运算放大器的单位增益缓冲器输出,得到模拟电压输出的温度信号。该温度传感器的结构简单、易于设计,并且具有较大输出电压范围。其中核心部分的面积约为0.056 mm^(2),当电源电压为5 V时,静态电流约为6μA。芯片经过流片,测试结果显示,测量温度范围在-55~120℃时,对应的输出电压为2.6~0.7 V,温度误差在3℃以内。In order to realize system-on-chip temperature monitoring,an analog output temperature sensor based on 0.18μm CMOS process was presented.The core part of the temperature sensor included a bias circuit and a temperature sensing circuit,and the auxiliary part included the unity-gain buffer circuit and electrostatic discharge protection circuits.A low voltage cascode current mirror structure was applied in the bias circuit and a direct stack of multiple PNP tubes was applied to convert the external temperature into a linear voltage signal with a negative temperature coefficient in the temperature sensing circuit.The temperature signal of the analog voltage output was obtained through the unit gain buffer output based on the rail-to-rail operational amplifier.This temperature sensor is simple,easy to design,and has a large output voltage range.The area of the core part is about 0.056 mm^(2),and the quiescent current is about 6μA when the supply voltage is 5 V.The chip was produced,and the test results show that when the temperature is-55-120℃,the corresponding output voltage is 2.6-0.7 V,and the temperature error is within 3℃.

关 键 词：CMOS温度传感器 PNP双极性晶体管 模拟输出 单位增益缓冲器 

分 类 号：TN402[电子电信—微电子学与固体电子学]