摘要
针对集成电路中需要多路不同基准电流的问题，设计了一种高性能的双极型基准电流源．分析了传统带隙基准源的基本原理，并对传统电流源的电路结构进行改进与优化，实现了温度补偿，大大降低了电路的温度系数，提高了电路的电源抑制比．在BL双极工艺模型下，采用HSPICE软件进行了仿真，结果表明，在一40—85℃温度范围内基准电流源的温度系数降至百万分之五每摄氏度，电源抑制比可以达到104dB，很好地实现了基准电流源低温度系数、高电源抑制比的性能．
Aiming at the requirement of IC for multipath reference current, a high-performance bipolar current reference was designed. The basic principle of the traditional bandgap current reference was analyzed, and some typical current references were compared. Trough improving and optimizing the structure of the traditional current circuit, the temperature compensation can be realized, the temperature coefficient of the circuit can be greatly reduced and the power supply rejection ration can be improved. The simulation was carried out with HSPICE software and using BL bipolar process model. The simulation results indicate that the temperature coefficient of the current reference can be as low as 5 x 10-6 per centidegree within the temperature range of -40℃ to 85℃. The power supply rejection ration is about 104 dB. The low temperature coefficient and high power supply rejection ration of current reference has been realized.
出处
《沈阳工业大学学报》
EI
CAS
2009年第4期471-476,共6页
Journal of Shenyang University of Technology
关键词
基准电流源
温度补偿
温度系数
电源抑制比
双极工艺
模拟电路
温漂
带隙基准
current reference
temperature compensation
temperature coefficient
power supply rejection ratio
bipolar process
analog circuit
temperature drift
bandgap reference
