Title :
A 92.6 % tuning range VCO utilizing simultaneously controlling of transformers and MOS varactors in 0.13 µm CMOS technology
Author :
Takigawa, Yusuke ; Ohta, Hiroshi ; Liu, Qing ; Kurachi, Satoshi ; Itoh, Nobuyuki ; Yoshimasu, Toshihiko
Author_Institution :
Grad. Sch. of Inf., Production & Syst., Waseda Univ., Kitakyushu, Japan
Abstract :
A novel resonant circuit consisting of transformer-based variable inductors and MOS varactors is proposed to implement an ultra-wideband voltage-controlled-oscillator (VCO). The VCO is designed and fabricated using 0.13 mum CMOS, and fully evaluated on wafer. The VCO IC exhibits a frequency tuning range as high as 92.6 % spanning from 1.2 GHz to 3.27 GHz. The measured phase noise of -120 dBc/Hz at 1 MHz offset from the 3.1 GHz carrier is obtained.
Keywords :
CMOS integrated circuits; MMIC oscillators; UHF integrated circuits; UHF oscillators; circuit tuning; field effect MMIC; phase noise; voltage-controlled oscillators; CMOS technology; MOS varactors; UWB; frequency 1.2 GHz to 3.27 GHz; frequency tuning range; phase noise; resonant circuit; size 0.13 mum; transformer-based variable inductors; ultrawideband voltage-controlled-oscillator; CMOS technology; Circuit optimization; Frequency; Inductors; RLC circuits; Transformers; Tuning; Ultra wideband technology; Varactors; Voltage-controlled oscillators; CMOS; VCO; Variable inductor; Wide-tuning range;
Conference_Titel :
Radio Frequency Integrated Circuits Symposium, 2009. RFIC 2009. IEEE
Conference_Location :
Boston, MA
Print_ISBN :
978-1-4244-3377-3
Electronic_ISBN :
1529-2517
DOI :
10.1109/RFIC.2009.5135495
