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基于CMOS亚阈值特性的低功耗温度传感器
Temperature Sensors Based on CMOS Sub-Threshold Characteristic
【摘要】 针对片上系统测温及其过温保护问题,提出了一种基于CMOS亚阈值特性制造的低功耗温度传感器.CSMC0.6μm数模混合工艺仿真表明,其在-50~150℃的温度范围内,都能良好工作,且因为运放负反馈结构对电源电压具有较高的抑制,在2~6V的范围内都能得到正确的输出结果.芯片实测,温度灵敏度为0.77V/℃.因为基于CMOS亚阈值特性产生了电路的偏置电流,所以工作电流仅16μA.芯片面积300μm×250μm.该传感器的特性表明它非常适用于高容量的集成微系统中,在计算机、汽车电子、生物医学等领域有着广阔的应用前景.
【Abstract】 The design of a compatible wide-range low-power smart temperature sensor based on the CMOS sub-threshold characteristic is presented for the purpose of on-chip temperature measure and protection from overheating.Simulated with CSMC 0.6μm mixed-signal CMOS technology,the circuit works well over the temperature range from -50 to 150℃.For the amplifier feedback,it has a high power supply rejection ratio under V_ DD from 2 to 6V.Measurements support the simulation result. The temperature sensitivity is 0.77V/℃.The power dissipation of the sensor is 16μA because the bias current is generated by the CMOS sub-threshold characteristic.The chip area is 300μm×250μm.The characteristics of this sensor make it especially suitable for low-cost high-volume integrated microsystems over a wide range of fields,such as computer,automotive,and biomedical.
【Key words】 temperature sensor; temperature protecting circuit; power supply rejection ratio; temperature sensitivity;
- 【文献出处】 半导体学报 ,Chinese Journal of Semiconductors , 编辑部邮箱 ,2006年09期
- 【分类号】TP212.11
- 【被引频次】6
- 【下载频次】310