An ultra low-power digitally controlled oscillator using novel Schmitt-trigger based hysteresis delay cells

IEICE Electronics Express

Mojtaba Lotfizad²  Arash Abadian²  M.B Ghaznavi-Ghoushchi¹  Nasser Erfani Majd² 

[1] School of Engineering, Shahed University;Tarbiat Modares University Faculty of Electrical and Computer Engineering

关键词: digitally controlled oscillator;    low power;    high resolution;    good linearity;    hysteresis delay cells;   

DOI  :  10.1587/elex.8.589

学科分类：电子、光学、磁材料

来源: Denshi Jouhou Tsuushin Gakkai

【 摘 要 】

References(6)Cited-By(2)In this paper, an ultra low power 15-bit digitally controlled oscillator (DCO) is proposed. The proposed DCO is designed based on a segmental coarse-tuning stage which employs novel Schmitt-trigger based hysteresis delay cells (HDC) as well as digitally controlled varactor (DCV) in the fine-tuning stage. Simulation of the proposed DCO using TSMC 180nm model achieves controllable frequency range of 191MHz ∼ 850MHz with a wide linearity. Monte Carlo simulation demonstrates that the time-period jitter due to random power supply fluctuation is under 124.8ps and the power consumption is 137µW at 215MHz with 1.8V power supply.

【 授权许可】

Unknown