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CN107990992B 高精度温度传感器及精度调节方法 有权

高精度温度传感器及精度调节方法
Abstract:
一种高精度温度传感器，包括第一MOS管201、MOS管组202、第二MOS管203、第三MOS管204、第一双极晶体管205和第二双极晶体管206、运算放大器208、补偿电路207和ADC109，MOS管组202包括n个串联的MOS管组成，MOS管组202内的MOS管参数与第一MOS管201的参数相同；第一MOS管201的漏级与第三MOS管204的源级相连，第三MOS管204的漏级与第一双极晶体管205的发射极相连，第一双极晶体管205集电极接地。通过增加额外的一阶补偿电路，减弱由于基准电压非理想导致的误差，进而实现更高精度的温度传感器：同时提出如何调整基准使温度传感器的精度更高。
Abstract(English):

A high-precision temperature sensor comprises first MOS (metal oxide semiconductor) transistor 201, MOS transistor unit 202, second MOS transistor 203, third MOS transistor 204, first bipolar transistor 205, second bipolar transistor 206, operational amplifier 208, compensation circuit 207 and ADC (analog-digital converter) 109; the MOS transistor tube 202 includes n MOS transistors in serial connection; MOS transistor parameters of the MOS transistor unit 202 are identical to parameters of the first MOS transistor 201; a drain of the first MOS transistor 201 is connected with a source of thethird MOS transistor 204; a drain of the third MOS transistor 204 is connected with an emitter of the first bipolar transistor 205; a collector of the first bipolar transistor 205 is grounded. By adding the extra first-order compensation circuit and weakening errors due to imperfectness of reference voltage, the temperature sensor of higher precision is achieved; in addition, how to adjust references to improve precision of the temperature sensor is proposed.

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