摘要
该文参考了带隙基准电压源领域的现阶段技术,结合自偏置共源共栅电流镜以及适当的启动电路、补偿电路,设计了一种高精度、低温漂的多输出带隙基准电路。首先简述了传统带隙电压基准的基本原理,然后详细阐述了具体的各电路设计过程。该基准电压源可广泛应用于电源管理芯片等对能耗要求极高的芯片中。
This paper takes the presently band-gap reference technique as foundation, a high precision and low temperature floats bandgap reference with multi-output is designed, the voltage reference is acquired to- gether with the self-biased cascode current mirror structure and setup circuit and curvature compensation cir- cuit. Firstly, the paper describes the characteristics of traditional band-gap reference ; Then the design process of each part circuit are described. According to the simulation results, over the temperature range of -30- 110℃ the temperature coefficient is 2.36 × 10 ^-6V/℃ and the PSRR is - 85.6dB at low frequency. The de- signed voltage reference can be widely used in power management chip and so on.
关键词
基准电压源
自偏置
曲率补偿
温度系数
voltage reference
self-biased
curvature compensation
temperature coefficient
