A low-phase-noise and wide-tuning-range LC digital controlled oscillator

Author

Hongtao Qi ; Yuan Wang ; Song Jia ; Ganggang Zhang ; Xing Zhang

Author_Institution

Shenzhen Grad. Sch., Peking Univ., Shenzhen, China

fYear

2014

fDate

28-31 Oct. 2014

Firstpage

1

Lastpage

3

Abstract

This paper presents a low-phase-noise and wide-tuning-range LC digital controlled oscillator (DCO). With six control words, the DCO obtains 0.8 GHz tuning range. This structure adopts two important technologies to suppress the phase noise. Using an LC noise filter at the source of the cross-coupled pMOS, it suppresses the second harmonic frequency noise. And a tail current-shaping technology is used to ensure the current peak align with the output voltage peak. The LC DCO is fabricated in SMIC 65nm CMOS technology. The proposed DCO exhibits an average phase noise of -127 dBc/Hz at 1 MHz offset from 2.35 GHz to 3.15 GHz carriers.

Keywords

CMOS analogue integrated circuits; LC circuits; MMIC oscillators; UHF filters; UHF integrated circuits; UHF oscillators; harmonics suppression; integrated circuit design; integrated circuit noise; microwave filters; phase noise; DCO; LC noise filter; SMIC CMOS technology; cross-coupled pMOS; current peak align; frequency 0.8 GHz; frequency 2.35 GHz to 3.15 GHz; low-phase-noise; output peak; second harmonic frequency noise suppression; size 65 nm; tail current-shaping technology; wide-tuning-range LC digital controlled oscillator; Abstracts; Capacitors;

fLanguage

English

Publisher

ieee

Conference_Titel

Solid-State and Integrated Circuit Technology (ICSICT), 2014 12th IEEE International Conference on

Conference_Location

Guilin

Print_ISBN

978-1-4799-3296-2

Type

conf

DOI

10.1109/ICSICT.2014.7021515

Filename

7021515