一种采用CDS电路的高精度CMOS温度传感器

摘要

This paper presents a novel accurate CMOS temperature sensor with a correlated double sampling(CDS)circuit designed,and simulated for thermal testing and monitoring chips in CMOS technologies.In this design,a nine-MOS-transistor temperature sensor's output current,which includes temperature characteristic integrated by a capacitor,the integral voltage signal is sent to a CDS circuit to eliminate kTC noise and reduce 1/f noise of the circuit.The new temperature sensor is compatible with standard CMOS technologies,and the simulation results show its good performances.%采用相关双采(CDS)电路,设计了一种新颖的高精度温度传感器,该温度传感器可用于CMOS集成电路的过温检测.传感器的温度感应部分仅采用9个MOS管,其输出的包含温度信息的电流信号通过一个电容进行积分,随后采用CDS电路对积分信号进行消除kTC噪声和降低1/f噪声处理,并同时进行采样处理,得到与温度成正比的电压信号.该新型温度传感器与标准CMOS工艺兼容,且仿真结果表明其具有较高的性能.