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首页> 外文期刊>Circuits and Systems I: Regular Papers, IEEE Transactions on >A 12.77-MHz 31 ppm/°C On-Chip RC Relaxation Oscillator With Digital Compensation Technique
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A 12.77-MHz 31 ppm/°C On-Chip RC Relaxation Oscillator With Digital Compensation Technique

机译:具有数字补偿技术的12.77MHz 31 ppm /°C片上RC弛豫振荡器

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摘要

The design of a 12.77-MHz on-chip RC relaxation oscillator with digital compensation technique is presented. To maintain the frequency stability versus temperature and supply voltage variations, loop delay tuning by a digital feedback loop is developed in this system. In order to generate an on-chip reference for digital calibration, a replica comparator is added. The on-chip relaxation oscillator is fabricated in 0.18-μm CMOS process. The measured output frequency variation is 31 ppm/°C across -30 to 120 °C temperature range after compensation. The frequency variation over the supply voltage from 0.6 V to 1.1 V is ±0.5%/V. The measured total power consumption is 56.2 μW at 0.9-V supply voltage when the digital compensation blocks are enabled. After digital compensation, the compensation blocks can be shutdown for power saving, and the main oscillator consumes only 12.8 μW.
机译:提出了一种采用数字补偿技术的12.77MHz片上RC弛豫振荡器的设计。为了保持频率稳定性随温度和电源电压变化的变化,在该系统中开发了通过数字反馈环路进行环路延迟调整的方法。为了生成用于数字校准的片上基准,添加了一个复制比较器。片上张弛振荡器采用0.18μmCMOS工艺制造。补偿后,在-30至120°C的温度范围内,测得的输出频率变化为31 ppm /°C。电源电压在0.6 V至1.1 V范围内的频率变化为±0.5%/ V。启用数字补偿模块时,在0.9V电源电压下测得的总功耗为56.2μW。经过数字补偿后,可以关闭补偿模块以节省功耗,主振荡器的功耗仅为12.8μW。

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