超低功耗数字控制振荡器,具有低抖动和高分辨率

Nasser Erfani Majd, M. Lotfizad, A. Abadian, Mohammad Bagher Ghaznavi Ghoushchi
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引用次数: 4

摘要

本文提出了一种超低功耗、低抖动的12位CMOS数字控制振荡器(DCO)的设计方案。基于环形振荡器实现的低功率施密特触发型逆变器。采用32nm CMOS预测晶体管模型(PTM)对所提出的DCO进行仿真,实现了550MHz ~ 830MHz的可控频率范围,具有宽线性度和高分辨率。蒙特卡罗仿真表明,在1.2V电源和0.53 ps分辨率下,在750MHz时,由于电源随机波动引起的时间段抖动小于31ps,功耗为0.5677mW。与传统设计相比,该DCO对电压和温度变化具有良好的鲁棒性和更好的线性度。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
An ultra low power digitally controlled oscillator with low jitter and high resolution
In this paper, an ultra low power and low jitter 12bit CMOS digitally controlled oscillator (DCO) design is presented. Based on a ring oscillator implemented with low power Schmitt trigger based inverters. Simulation of the proposed DCO using 32nm CMOS Predictive Transistor Model (PTM) achieves controllable frequency range of 550MHz∼830MHz with a wide linearity and high resolution. Monte Carlo simulation demonstrates that the time-period jitter due to random power supply fluctuation is under 31ps and the power consumption is 0.5677mW at 750MHz with 1.2V power supply and 0.53-ps resolution. The proposed DCO has a good robustness to voltage and temperature variations and better linearity comparing to the conventional design.
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