Title :
An Adaptive Body-Biased VCO with Voltage-Boosted Switched Tuning in 0.5-V Supply
Author :
Park, Dongmin ; Cho, SeongHwan
Author_Institution :
Dept. of Electr. Eng. & Comput. Sci., Korea Adv. Inst. of Sci. & Technol., Daejon
Abstract :
This paper presents an adaptive body-biased low-voltage VCO. Despite the 0.5-V supply, the VCO uses coarse digital tuning by employing voltage-boosting technique. In addition, the effect of PVT variations is reduced by adaptive body-biasing technique. The proposed VCO is implemented in 0.18 mum CMOS technology and operates at 2.4 GHz. It achieves phase noise of -115.8 dBc/Hz at 1-MHz offset and 7.3 % of tuning range, while consuming 200 muW. Figure-of-merit with the tuning range is -189.1 dBc/Hz, which is the lowest among the recent state-of-the-art low-voltage VCOs
Keywords :
CMOS integrated circuits; circuit tuning; low-power electronics; voltage-controlled oscillators; 0.18 micron; 0.5 V; 1 MHz; 2.4 GHz; 200 muW; CMOS technology; VCO; adaptive body-biasing technique; coarse digital tuning; voltage-boosted switched tuning; voltage-boosting technique; CMOS technology; Circuit optimization; Low voltage; Switched capacitor circuits; Switches; Switching circuits; Tail; Threshold voltage; Topology; Voltage-controlled oscillators;
Conference_Titel :
Solid-State Circuits Conference, 2006. ESSCIRC 2006. Proceedings of the 32nd European
Conference_Location :
Montreux
Print_ISBN :
1-4244-0303-0
DOI :
10.1109/ESSCIR.2006.307476
