Title :
A 9.3MHz to 5.7GHz tunable LC-based VCO using a divide-by-N injection-locked frequency divider
Author :
Hara, Shoichi ; Okada, Kenichi ; Matsuzawa, Akira
Author_Institution :
Dept. Phys. Electron., Tokyo Inst. of Technol., Tokyo, Japan
Abstract :
This paper proposes a novel wideband voltage-controlled oscillator (VCO) for multi-band transceivers. The proposed oscillator has a core VCO and a tuning-range extension circuit, which consists of an injection-locked frequency divider (ILFD), and flip flop dividers. The 2-stage differential ILFD can generate quadrature outputs, and it realizes 2, 3, 4, and 6 of divide ratio with very wide output frequency range. The proposed circuit is implemented by using a 90 nm CMOS process, and the chip area is 250 ¿m × 200 ¿m. The measured results achieves 9.3 MHz-to-5.7 GHz (199%) of continuous frequency tuning range with -210 dBc/Hz of FoMT.
Keywords :
CMOS integrated circuits; MMIC oscillators; UHF oscillators; VHF oscillators; field effect MMIC; flip-flops; frequency dividers; injection locked oscillators; transceivers; voltage-controlled oscillators; CMOS process; chip area; differential ILFD; divide-by-N injection-locked frequency divider; flip flop dividers; frequency 9.3 MHz to 5.7 GHz; multiband transceivers; quadrature outputs; size 90 nm; tunable LC-based VCO; tuning-range extension circuit; wideband voltage-controlled oscillator; CMOS process; Circuit optimization; Frequency conversion; Frequency measurement; Injection-locked oscillators; Semiconductor device measurement; Transceivers; Tunable circuits and devices; Voltage-controlled oscillators; Wideband;
Conference_Titel :
Solid-State Circuits Conference, 2009. A-SSCC 2009. IEEE Asian
Conference_Location :
Taipei
Print_ISBN :
978-1-4244-4433-5
Electronic_ISBN :
978-1-4244-4434-2
DOI :
10.1109/ASSCC.2009.5357184
