摘要
带隙基准电压源在同一工艺的不同工艺角下,基准源的输出电压会有很大的变化.为了减少工艺角变化的影响,引入数字修调技术,对影响带隙输出基准电压的电阻阻值进行修调,以保证不同工艺角下的电压基准值可以通过修调调回理想值.基于华虹NEC 0.35μm BCD工艺的仿真结果表明,修调后的带隙基准源在-40℃-85℃范围内,各工艺角下基准电压的温度系数均小于6 ppm/℃.
In different process corners of the same process,output voltage of bandgap reference will have a large change. In order to reduce the affect induced by the process corners change,digital trimming technology is introduced,which trims the resistance that influences the output voltage of bandgap reference to ensure that the voltage reference of different process corners can be adjusted to the ideal value by trimming. Simulation result based on HHNEC 0. 35 μm BCD process indicates that the temperature coefficient of the trimmed bandgap reference is 6 ppm / ℃ in various technique corners,ranging from- 40 ℃ to 85 ℃.
出处
《渤海大学学报（自然科学版）》
CAS
2014年第4期325-329,384,共6页
Journal of Bohai University:Natural Science Edition
基金
国家自然科学基金项目(No:61372019)
关键词
带隙基准
工艺角
数字修调
温度系数
bandgap reference
process corner
digital trimming
temperature coefficient
