Throughthe in-depthstudy of the temperature characteristics of the base emitter voltage VBE,the line-ar term and the high-order function relationship related to absolute temperature in VBE are derived.On this basis,a circuit is designed that can generate acurrent proportional to the square of the absolute temperature,and superim-pose the current on the traditional bandgap reference source to further reduce the temperature coefficient.The CSMC0.18 umstandard CMOS process is used for simulation,and the reference source temperature coefficient after second-order curvature compensation is 8.8ppm/°C.
关键词
带隙基准源/温度系数/二阶曲率补偿/与温度无关电流
Key words
bandgap reference source/temperature coefficient/second-order curvature compensation/temper-ature-independent current
维普
万方数据