用于MEMS集成加速度计的带隙参考电路的设计
Wenbo Zhang1, Shanshan Wang2, Yihang Wang3
1School of Astronautics, Harbin Institute of Technology, Harbin 150001, China.
Micromachines
|November 27, 2025
概括
本研究引入了一种用于集成加速度计的新型操作放大器 (op-amp) 电路,提供高精度的参考电压,广泛的电压范围和低功耗. 该设计实现了出色的性能指标,平衡了驱动能力与适用于苛刻应用的稳定性.
科学领域:
- 电气工程 电气工程
- 微电子学微电子学
- 模拟电路设计 模拟电路设计
背景情况:
- 集成加速度计需要稳定,高精度的参考电压.
- 现有的设计往往难以平衡广泛的供应电压范围,高电流驱动和低功耗.
- CMOS/BiCMOS技术为先进的电路解决方案提供了机会.
研究的目的:
- 提出和验证一个新的带隙参考操作放大器 (op-amp) 电路.
- 为了满足集成加速度计的严格要求,包括宽供应电压,高电流驱动和低功率.
- 为了证明工程实用性和传感器系统中的广泛应用性.
主要方法:
- 实现一个CMOS/BiCMOS操作放大器电路.
- 使用折叠类代码输入阶段和AB类输出阶段.
- 包括自适应输出开关,复合频率补偿,超电流保护和噪声抑制技术.
主要成果:
- 实现了0.2V~2.8V的输出摆动,低频增益为102~118dB.
- 证明了60Hz的电源拒绝比率 (PSRR) 为90dB,超电流保护为±25mA.
- 在整个供应范围内保持静电电流低于150μA,线路/负载调节分别优于150μV/V和150μV/mA.
结论:
- 拟议的操作放大器设计成功地平衡了在严格的功率限制下高驱动能力和稳定性.
- 该电路非常适合作为集成加速度计的带隙参考缓冲阶段.
- 该设计具有强大的工程实用性和在微电子系统中广泛应用的潜力.
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