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

Wang Lidan; Li Zhiqun; Wang Zengqi; Wang Zhigong

doi:10.1587/elex.10.20130535

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

Wang Lidan, Li Zhiqun, Wang Zengqi, Wang Zhigong

著者情報

キーワード: low voltage, low power, varactor, forward-body bias

ジャーナルフリー早期公開

論文ID: 10.20130535

DOI https://doi.org/10.1587/elex.10.20130535

この記事には本公開記事があります。

The final version of this article is now available: Vol. 10 (2013), No. 15 p. 20130535

詳細

抄録

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 g_m 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.

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