一种低温度系数的高精度带隙基准源设计

A Design of a High-precision Bandgap Reference Source with Low Temperature Coefficient

随着集成电路行业的发展,无线通信设备对电源稳定性的要求越来越高。在这种需求下,针对低温度系数高PSRR的基准源展开设计,在设计中采用折叠式共源共栅设计结构和零温度系数的补偿电路。基于中芯国际0.13μmCMOS工艺,使用cadence仿真软件进行优化。结果表明,在温度范围为-40℃~85℃之间,设计的高精度带隙基准源能够实现6.44 ppm/℃温度系数输出,电源抑制比为-90.25 dB,功耗为0.09 mW。

With the development of integrated circuit industry,wireless communication equipment and other equipment have higher and higher requirements for power stability.In this case,the reference source with low temperature coefficient and high PSRR is designed.The folded common source and common gate design structure and zero temperature coefficient compensation circuit are used in the design.Based on SMIC 0.13μMCMOS process,it is optimized using cadence simulation software.The results show that in the temperature range of-40℃~85℃,the designed high-precision bandgap reference can achieve 6.44 ppm/℃temperature coefficient output,power supply rejection ratio is-90.25dB,and power consumption is 0.09mW.