电子元件与材料2024，Vol.43Issue(5)：617-624,8.DOI:10.14106/j.cnki.1001-2028.2024.1510
一种低温漂低功耗的带隙基准电压源设计
Design of a bandgap reference voltage source with low temperature drift power
摘要
Abstract
To enhance the performance of DC-DC converters,a voltage bandgap reference was proposed.The first-order temperature dependence of the current in two sides were offset by adjusting parameters,resulting in current with only a constant term and high-order temperature dependent terms.As a result,the output resistance is compensated by the high-order temperature dependent terms of the transistor,which yields a lower temperature coefficient of the bandgap.An RC filter was added at the output to enhance the power supply rejection ratio in the high-frequency range.Additionally,almost all MOS transistors were placed in the subthreshold region to explore the characteristics of the bandgap at low power consumption and achieve a reduction in static current.The circuit design and simulation were completed based on the TSMC 0.18 μm CMOS process.The results show that the bandgap output is 1.256 V at a supply voltage of 1.8 V.From-40 ℃ to 140 ℃,the temperature coefficient is 6.3x 10-6℃-1.By adding an RC filter,the power supply rejection ratio is-65 dB@10 MHz at high frequency.Moreover,the static current of the entire bandgap is only 6.2 μA.关键词
带隙基准/温度补偿/亚阈值/温度系数Key words
bandgap reference/temperature compensation/subthreshold/temperature coefficient分类
信息技术与安全科学引用本文复制引用
张涛,刘逸冬,刘劲..一种低温漂低功耗的带隙基准电压源设计[J].电子元件与材料,2024,43(5):617-624,8.基金项目
国家自然科学基金(61873196) （61873196）
