摘要
介绍了一种高精度基准电流源。首先设计出不同温度系数的电流IPATA和-IVBE的产生电路,然后分析线性补偿的基本原理,通过电流的减法运算,在整个温度范围内分两段产生不同的补偿电流INL,并完成对电流IPATA的分段线性补偿,从而获得温度系数较低的带隙基准电流源。仿真结果表明:在-42℃～120℃的温度范围内,该电路输出基准电流的温度系数小于10-5/℃。
A high precision reference current source was designed. Current IpATA and -IVBE with different temperature coefficients were achieved. The principle of piecewise compensation was described. By using current＇s subtraction operation, the circuit generated two different compensating currents INL in the full temperature range and made a piecewise compensation for current IPATA to achieve bandgap reference current with lower temperature coefficient. Simulation results with HSPICE showed that the reference current source had a temperature coefficient smaller than 10^-5℃ over the temperature range from -42℃ to 120℃.
出处
《微电子学》
CAS
CSCD
北大核心
2009年第5期602-605,共4页
Microelectronics
基金
国家自然科学基金资助项目(60436030)
关键词
基准电流源
分段补偿
温度系数
Current reference source
Piecewise compensation
Temperature coefficient
