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Modeling of Non-linearity in Digitally Controlled Oscillator in 0.18 µm CMOS Technology
Abhishek TOMAR Shashank LINGALA Ramesh K. POKHAREL Haruichi KANAYA Keiji YOSHIDA
IEICE TRANSACTIONS on Electronics
Publication Date: 2010/10/01
Online ISSN: 1745-1353
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Microwaves, Millimeter-Waves
DCO, DNL, tuning range, monotonicity, phase noise, 0.18 µm CMOS,
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An analytical method to make a trade off between tuning range and differential non-linearity (DNL) for a digitally controlled oscillator (DCO) is proposed. To verify the approach, a 12 bit DCO is designed, implemented in 0.18 µm CMOS technology, and tested. The measured DNL was -0.41 Least Significant Bit (LSB) without degrading other parameters which is the best so far among the reported DCOs.