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Design of Bandgap Voltage Reference Used in Television System
Author(s): 
Pages: 61-63,83
Year: Issue:  1
Journal: Video Engineering

Keyword:  带隙基准电压源温度系数电源抑制比;
Abstract: 针对传统一阶温度补偿的CMOS带隙基准电压源的温度特性较差的问题,在此基础上采用高阶温度补偿以改善温度特性,并且在电路中增加了带有负反馈的前调整器,提高了基准电压的电源抑制比.对电路采用SMICO.18CMOS工艺进行仿真,输出电压在温度为-20℃~+58℃范围内有负的温度系数2.34×10-6/℃,在温度为58℃~120℃范围内有正的温度系数为2.21×10-6/℃,在低频时电源抑制比可达116 dB,在10 kHz时也可达到73 dB.
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