摘要
简单介绍了带隙基准源的基本原理,给出了一款基于Widlar结构的带曲率补偿的带隙基准电压电流源的设计方法,通过采用TSMC_0.5μm工艺库对电路进行仿真,在-40～150℃的温度范围内,其带隙基准的输出具有12ppm/℃的温度系数,电流基准的输出具有42ppm/℃。此外,文中还对曲率补偿电路的工作原理进行了分析,并且通过仿真波形对曲率补偿的工作机制进行了讨论。
The principle of band-gap voltage reference is introduced. A design method of band-gap voltage reference and current reference with curvature compensation based on Widlar＇s structure is proposed. The circuit is simulated with TSMC_0.5 μm model, in the temperature extent of -40- 150 ℃, the output temperature coefficient of the band-gap voltage reference is 12 ppm/℃, the output temperature coefficient of the current voltage reference is 42 ppm/℃. The theory of curvature compensation circuit is analyzed and the working mechanism of curvature compensation circuit is discussed.
出处
《物联网技术》
2012年第2期64-67,共4页
Internet of things technologies
关键词
Widlar结构
带隙基准
电流基准
曲率补偿
Widlar structure
band-gap voltage reference
current reference
curvature compensation
