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A 12-GHz Fully Integrated Cascode CMOS LC VCO With Q-Enhancement Circuit
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- Authors
- Bong Hyuk Park, Seung Sik Lee, Sang Sung Choi, Song Cheol Hong
- Issue Date
- 2008-02
- Citation
- IEEE Microwave and Wireless Components Letters, v.18, no.2, pp.133-135
- ISSN
- 1531-1309
- Publisher
- IEEE
- Language
- English
- Type
- Journal Article
- Abstract
- A fully integrated complementary metal oxide semiconductor (CMOS) cascode LC voltage controlled oscillator (VCO) with Q-enhancement technique has been designed for high frequency and low phase noise. The symmetrical cascode architecture is implemented with negative conductance circuit for improving phase noise performance in 0.18 μm CMOS technology. The measured phase noise is -110.8 dBc/Hz at the offset frequency of 1 MHz. The tuning range of 630 MHz is achieved with the control voltage from 0.6 to 1.4 V. The VCO draws 4.5 mA in a differential core circuit from 1.8 V supply. © 2008 IEEE.
- KSP Keywords
- CMOS Technology, Cascode CMOS, Complementary metal-oxide-semiconductor(CMOS), Core circuit, High frequency(HF), LC voltage controlled oscillator(LC-VCO), Metal-oxide(MOX), Noise performance, Q-enhancement, Tuning Range, control voltage