一个254nW20kHz的芯片上RC振荡器,具有21ppm/°C的最低温度稳定性和10ppm的长期稳定性
Nikita Mirchandani1, Aatmesh Shrivastava2
1ON Semiconductor, USA.
概括
这项研究引入了一个温度补偿RC振荡器 (TC-RCO),实现了极好的稳定性. 这种低功率振荡器非常适合需要在不同温度下精确计时的应用.
科学领域:
- 集成电路设计 集成电路设计
- 类似的电子产品.
- 在CMOS技术的基础上.
背景情况:
- 对于许多电子系统来说,在温度变化中实现稳定的振荡频率至关重要.
- 传统的RC振荡器在温度变化时会遭受显著的频率漂移.
- 需要先进的补偿技术来满足严格的稳定性要求.
研究的目的:
- 设计和展示一种新的温度补偿RC振荡器 (TC-RCO).
- 使用标准CMOS技术实现高温稳定性和低功耗.
- 为了研究和减轻振荡器中的二次温度效应.
主要方法:
- 使用普通晶体管的130纳米CMOS技术.
- 实现了用于第一阶温度补偿的恒定传导率 (gm) 偏差.
- 使用的设备基于不匹配的偏移纠正和对比器延迟补偿二级效应取消.
- 整合了一种关税循环技术来进行偏移校正.
主要成果:
- 在-20至100°C范围内达到21ppm/°C的最低温度稳定性.
- 经过证明的低功耗:在1V电源的最低功率模式下254nW.
- 在两个模式下运行:低功率 (254 nW平均值). 和高稳定性 (345 nW平均值. ) 的情况.
- 经过1秒的整合时间,长期稳定性为10ppm.
结论:
- 提出的TC-RCO有效地弥补温度变化,提供卓越的稳定性.
- 该设计平衡了低功耗与高性能,适合各种应用.
- 补偿技术的组合成功地取消了二次温度依赖的效应.
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