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IEICE TRANSACTIONS on Electronics

Frequency Resolution Enhancement for Digitally-Controlled Oscillator Based on a Single-Period Switching Scheme

Kazutoshi KODAMA, Tetsuya IIZUKA, Toru NAKURA, Kunihiro ASADA

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Summary :

This paper proposes a high frequency resolution Digitally-Controlled Oscillator (DCO) using a single-period control bit switching scheme. The proposed scheme controls the tuning word of DCO in a single period for the fine frequency tuning. The LC type DCO is implemented to realize the proposed scheme, and is fabricated using a standard 65 nm CMOS technology. The measurement results show that the implemented DCO improves the frequency resolution from 560 kHz to 180 kHz without phase noise degradation with an additional area of 200 µm2.

Publication
IEICE TRANSACTIONS on Electronics Vol.E95-C No.12 pp.1857-1863
Publication Date
2012/12/01
Publicized
Online ISSN
1745-1353
DOI
10.1587/transele.E95.C.1857
Type of Manuscript
PAPER
Category
Electronic Circuits

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