一种带有新型曲率补偿的带隙基准电压源设计

A Bandgap Reference Design with Novel Curvature Compensation

设计了一种具有新型曲率补偿的电流模式的带隙基准电压源电路,通过在高温时产生一路正温度系数的电流注入到输出端来补偿VBE的高阶负温度系数项实现曲率补偿,从而得到更低温度系数的输出电压.同时采用一种有效的启动电路保证电路上电后可正常启动.该设计基于SMIC 0.13μm CMOS工艺,在1.2V电源电压下,输出基准电压为500mV,在-30～130℃范围内温度系数的版图后仿真可达到3.1×10-6 V/℃,整个电路功耗为180μW.

In order to get a lower temperature coefficient reference voltage,a novel bandgap reference with current mode curvature compensation is presented.The design is implemented by generating a positive temperatute coefficient current at higher temperature and injecting it to the output to compensate the nonlinear terms of VBE.Moreover,a startup circuit was introduced,which can start the core circuit effectively after power on.The design is simulated with SMIC 0.13μm CMOS process,an output reference voltage of 500mV under 1.2V supply is available,and a temperature coefficient of 3.1×10-6 V/℃ can be achieved within the range of-30～130℃.The total power consumption of the circuit is 180μW.