A 0.5V 0.18µm CMOS LC-VCO with a novel switched varactor technique

IEICE Electronics Express

Li Zhiqun¹  Wang Zengqi¹  Wang Lidan¹  Wang Zhigong¹ 

[1] Institute of RF- & OE-ICs, Southeast University

关键词: low voltage;    low power;    varactor;    forward-body bias;   

DOI  :  10.1587/elex.10.20130535

学科分类：电子、光学、磁材料

来源: Denshi Jouhou Tsuushin Gakkai

【 摘 要 】

References(7)A 0.5V LC-VCO implemented in 0.18µm CMOS with a novel switched varactor technique is described in this paper. This novel switched varactor technique can increase the varactor control voltage variation range and increase Q of LC tank; also it can reduce phase noise and power consumption of VCO. Forward-body bias technique is used to reduce the threshold voltage and improve gm of transistor. The measured operating current is 4.4mA and the tuning range is 4.6∼5.2GHz. The phase noise is −114dBc/Hz at 1MHz from carrier frequency 4.8GHz.

【 授权许可】

Unknown