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A high frequency resolution Digitally-Controlled Oscillator using single-period switching scheme

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3 Author(s)
Kodama, K. ; Dept. of Electr. Eng. & Inf. Syst., Univ. of Tokyo, Tokyo, Japan ; Iizuka, T. ; Asada, K.

This paper proposes a high frequency resolution Digitally-Controlled Oscillator (DCO) using 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 65nm CMOS technology. The measurement results show that the implemented DCO improves the frequency resolution from 0.63MHz to 0.27MHz without phase noise degradation with an additional area of 200μm2.

Published in:

ESSCIRC (ESSCIRC), 2011 Proceedings of the

Date of Conference:

12-16 Sept. 2011

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