← 返回 JSSC 论文列表JSSC 2023第9期Clocking & PLLs0.13µm
A Single-Trim Frequency Reference System With 07 ppmC From 63 C to 165 C Consumi
提出一种单点温度修调和批量校准的高精度低功耗频率参考系统，替代晶体振荡器。
0.13µm HV CMOS SOI, 3V, 64µA, ±93ppm (-63°C~165°C), 0.69mm²
频率参考单点修调LC振荡器环形振荡器低功耗
▸创新点1：单点温度修调结合批量校准方法创新，通过工厂单点修调和数字存储技术，显著降低频率误差至±93 ppm，覆盖-63°C至165°C宽温范围，简化传统多温度点修调的复杂性。
▸创新点2：利用LC振荡器（LCO）校准环形振荡器（CCO）的系统创新，通过PVTL优化的LCO周期性校准CCO，实现高稳定性（52 ppm老化漂移）与低功耗（64 µA）的协同优化。
▸创新点3：高功率LC振荡器的深度占空比设计创新，通过间歇工作模式降低平均功耗，同时维持校准精度（92 ppm/V电源抑制），解决稳定性与功耗的矛盾。
▸创新点4：全集成化设计创新，在0.13-µm CMOS SOI工艺中整合电压调节器、温度传感器及校准引擎，芯片面积仅0.69 mm²，为晶体振荡器替代提供低成本解决方案。
Abstract
This article presents a frequency reference system
that combines high frequency accuracy and low power consump-
tion using a single-point temperature trim and batch calibration.
The system is intended as a low-cost fully integrated crystal
oscillator replacement. In this system, the oscillation frequency
of a power-efficient, but process, voltage, temperature (PVT) and
lifetime (L)-sensitive current-controlled ring oscillator (CCO) is
periodically (re)calibrated by the well-behaved frequency sta