Title :
A high frequency resolution Digitally-Controlled Oscillator using single-period switching scheme
Author :
Kodama, Kazutoshi ; Iizuka, Tetsuya ; Asada, Kunihiro
Author_Institution :
Dept. of Electr. Eng. & Inf. Syst., Univ. of Tokyo, Tokyo, Japan
Abstract :
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.
Keywords :
circuit switching; digital control; oscillators; phase locked loops; fine frequency tuning; frequency 0.27 MHz; frequency 0.63 MHz; high frequency resolution digitally-controlled oscillator; single-period control bit switching scheme; size 65 nm; Capacitance; Capacitors; Frequency measurement; Phase locked loops; Pulse generation; Switches; Tuning;
Conference_Titel :
ESSCIRC (ESSCIRC), 2011 Proceedings of the
Conference_Location :
Helsinki
Print_ISBN :
978-1-4577-0703-2
Electronic_ISBN :
1930-8833
DOI :
10.1109/ESSCIRC.2011.6044991