BAN前置处理电路的参考电压源设计  

Design of voltage reference for pre-processing circuit of human body area network

作　　者：周前能[1] 王黎[1] 林金朝[1] 陈飞[1] 罗伟[2] 

机构地区：[1]重庆邮电大学光电信息感测与传输技术重庆市重点实验室,重庆400065 [2]四川理工学院自动化与电子信息学院,自贡643000

出　　处：《重庆邮电大学学报（自然科学版）》2015年第2期245-249,共5页Journal of Chongqing University of Posts and Telecommunications(Natural Science Edition)

基　　金：国家自然科学基金(61102075;61301124;61471075);重庆市教委科学技术研究项目(KJ120503;KJ120533);重庆高校创新团队建设计划(智慧医疗系统与核心技术创新团队)~~

摘　　要：基于华润上华0.5μm混合信号标准CMOS工艺设计了一种适用于人体局域网(human body area network,BAN)前置处理电路的高性能参考电压源。通过采用正温度系数电阻与负温度系数电阻的温度互补技术,参考电压源获得非常低的温漂特性;通过采用前调整器技术,有效地提高了参考电压源输出电压的电源抑制比。仿真结果显示,在室温及4 V电源电压条件下,参考电压源获得了1.312 3 V的输出参考电压;当温度在-20—120℃变化时,参考电压源输出电压的温度系数仅为6.0 ppm/℃;当电源电压从3.5 V变化到6 V时,参考电压源的输出电压在1.312 325—1.312 365 V变化,其变化量仅为40μV;参考电压源在1 k Hz,10 k Hz,100 k Hz及1 MHz频率处分别获得-98.9 d B,-97.1 d B,-81.7 d B及-57.4 d B的电源抑制比。This paper designs a high-performance voltage reference for the pre-processing circuit of human body area network（ BAN） in CSMC 0. 5 μm mixed-signal standard CMOS process. The voltage reference achieves a well low temperature-drift performance by adopting the complementary technique of positive-temperature-coefficient resistance and negativetemperature-coefficient resistance. By adopting the technique of pre-regulator,voltage reference achieves well performance of power supply rejection ratio（ PSRR）. Simulation results show that the designed voltage reference achieves an output voltage of 1. 312 3 V under the condition of room temperature and 4 V of power supply voltage. The output voltage of the designed voltage reference has only a temperature coefficient of 6. 0 ppm/℃ when temperature changes from-20 ℃ to 120℃. The output voltage of the voltage reference is in the range from 1. 312 325 V to 1. 312 365 V when power supply voltage changes from 3. 5 V to 6 V,and whose deviation is only 40 μV. The voltage reference at 1 k Hz,10 k Hz,100 k Hz and 1MHz achieves the PSRR of- 98. 9 d B,- 97. 1 d B,- 81. 7 d B and- 57. 4 d B respectively.

关 键 词：人体局域网(BAN) 前置电路 参考电压源 温度补偿 

分 类 号：TN432[电子电信—微电子学与固体电子学]