Title :
A 1V Dual-Band VCO Using an Integrated Variable Inductor
Author :
Leung, Lincoln L K ; Chui, Kay W C ; Luong, Howard C.
Author_Institution :
Dept. of Electr. & Electron. Eng., Hong Kong Univ. of Sci. & Technol.
Abstract :
An integrated variable inductor is proposed using an on-chip transformer to obtain 2 inherent resonant modes for band-switching applications. Employing such a variable inductor in a 0.18-mum CMOS process at a 1-V supply, a VCO is demonstrated to oscillate in 2 distinct frequency bands from 2.2 GHz to 3.6 GHz and from 10.7 GHz to 11.3 GHz. The VCO measures phase noise of around -135.5 dBc/Hz for the lower band and around -126.5dBc/Hz for the upper band at 10-MHz offset while consuming 5mW and occupying an area of 0.4times0.8 mm2
Keywords :
CMOS analogue integrated circuits; UHF oscillators; microwave oscillators; variable-frequency oscillators; voltage-controlled oscillators; 0.18 micron; 0.4 mm; 0.8 mm; 1 V; 10.7 to 11.3 GHz; 2.2 to 3.6 GHz; 5 mW; CMOS process; VCO; dual-band; integrated variable inductor; on-chip transformer; voltage controlled oscillator; Area measurement; CMOS process; Dual band; Frequency; Inductors; Noise measurement; Phase measurement; Phase noise; Resonance; Voltage-controlled oscillators;
Conference_Titel :
Asian Solid-State Circuits Conference, 2005
Conference_Location :
Hsinchu
Print_ISBN :
0-7803-9163-2
Electronic_ISBN :
0-7803-9163-2
DOI :
10.1109/ASSCC.2005.251718
