An ultra-low-power and portable digitally controlled oscillator for SoC applications
An ultra-low-power and portable digitally controlled oscillator for SoC applications
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DOI：
10.1109/tcsii.2007.903782
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发表时间：
2007-11-01
影响因子：
4.4
通讯作者：
Lee, Chen-Yi
中科院分区：
文献类型：
--
作者：
Sheng, Duo;Chung, Ching-Che;Lee, Chen-Yi
本文提出了一种基于单元设计的超低功耗数字控制振荡器（DCO）。基于分段延迟线（SDL）和滞环延迟单元（HDC），与传统方法相比，粗调和微调阶段的功耗分别可节省70%和86.2%。此外，所提出的DCO采用级联级结构，以实现高分辨率和宽范围在同一时间。测量结果表明，功耗的建议DCO可以提高到140 μ W（@200 MHz）与1.47 ps的分辨率。此外，所提出的DCO可以用标准单元来实现，使得它可以容易地移植到不同的工艺，非常适合SoC应用。
In this paper, a novel ultra-low-power digitally controlled oscillator (DCO) with cell-based design for system-on-chip (SoC) applications is presented. Based on the proposed segmental delay line (SDL) and hysteresis delay cell (HDC), the power consumption can be saved by 70% and 86.2% in coarse-tuning and fine-tuning stages, respectively, as compared with conventional approaches. Besides, the proposed DCO employs a cascade-stage structure to achieve high resolution and wide range at the same time. Measurement results show that power consumption of the proposed DCO can be improved to 140 mu W (@200 MHz) with 1.47-ps resolution. In addition, the proposed DCO can be implemented with standard cells, making it easily portable to different processes and very suitable for SoC applications.