Title :
A 3.3 GHz LC-based digitally controlled oscillator with 5kHz frequency resolution
Author :
Zhuang, Jingcheng ; Du, Qingjin ; Kwasniewski, Tad
Author_Institution :
Carleton Univ., Ottawa
Abstract :
This paper reports a LC-based digitally controlled oscillator (DCO) with an enhanced frequency resolution and an extended linear frequency tuning range. It has a center frequency of 3.3 GHz. and a frequency tuning range of 600 MHz covered by 64 different frequency bands. Each frequency band has 2048 linear tuning levels with a frequency step of 5 kHz. This DCO was implemented in 90 nm CMOS and the measured frequency tuning characteristics arc provided in this paper. The DCO exhibits a phase noise of -11 NdBc/Hz. at 1 MHz frequency offset. The DCO core consumes 2 mA current from 1.2 V supply.
Keywords :
CMOS integrated circuits; MMIC oscillators; circuit tuning; CMOS; digitally controlled oscillator; extended linear frequency tuning; frequency 3.3 GHz; frequency band; frequency resolution; size 90 nm; voltage 1.2 V; Capacitance; Circuit optimization; Digital control; Digital-controlled oscillators; Frequency synthesizers; Phase locked loops; Phase noise; Tuning; Varactors; Voltage-controlled oscillators;
Conference_Titel :
Solid-State Circuits Conference, 2007. ASSCC '07. IEEE Asian
Conference_Location :
Jeju
Print_ISBN :
978-1-4244-1359-1
Electronic_ISBN :
978-1-4244-1360-7
DOI :
10.1109/ASSCC.2007.4425722
