设计具有高PSRR和强大的负载驱动能力的带隙参考
1School of information Science and Engineering, Shenyang University of Technology, Shenyang 110870, China.
Micromachines
|January 28, 2026
概括
本研究提出了一种改进的带隙参考 (BGR) 电路,其稳定性和承载能力得到了提高. 新型设计尽量减少温度漂移,并改善电源拒绝,以获得可靠的电压参考.
科学领域:
- 电气工程 电气工程
- 模拟集成电路设计模拟集成电路设计
- 半导体设备 半导体设备
背景情况:
- 传统的带隙参考 (BGR) 电路受到温度偏移,电源拒绝差,负载驱动能力有限的影响.
- 由于结构不匹配,BGR中的内在偏移电压降低了参考电压的稳定性.
- 现有的设计往往无法在动态负载条件下保持稳定的输出.
研究的目的:
- 引入增强带隙参考 (BGR) 设计,克服传统电路的局限性.
- 为了提高BGR电路的温度稳定性,电源拒绝率 (PSRR) 和负载驱动能力.
- 为了实现稳定的2.5V参考电压,具有最小的温度系数和出色的负载承受能力.
主要方法:
- 实现了一个对称折叠的共发射器-共基双极结晶体管 (BJT) 放大器,具有MOS辅助偏差.
- 强制分支电压对称性以抑制由结构不匹配引起的内在偏移电压.
- 集成了一个负反自适应电流调节驱动器,用于动态输出电流调节.
主要成果:
- 拟议的BGR设计从3.3V电源实现了稳定的2.5V输出电压.
- 证明了低温度系数 (TC) 的2.372×10−6°C−1.
- 在DC时模拟PSRR值为-114.2dB,在1kHz时为-62.07dB.
- 具有出色的负载承受性,保持稳定的2.5V输出,负载容量从0.1μF到100μF不等.
结论:
- 改进的BGR设计有效地抑制了内在偏移,从而提高了参考电压的稳定性.
- 集成的自适应电流驱动器显著提高了负载驱动能力和在不同负载下输出稳定性.
- 拟议的电路为需要具有高精度和可靠性的稳定电压参考值的应用提供了优质的替代方案.
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