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A Transformer-based Low Phase Noise And Widely Tuned CMOS Quadrature VCO
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- Authors
- Young Jae Lee, Hyun Kyu Yu
- Issue Date
- 2006-05
- Citation
- International Symposium on Circuits and Systems (ISCAS) 2006, pp.4014-4017
- Publisher
- IEEE
- Language
- English
- Type
- Conference Paper
- Abstract
- A VCO at 10GHz using the transformer-based LC tank in 0.18μm CMOS technology is designed. The LC tank is realized employing the drain-gate transformer feedback configuration. To apply to the pmos and nmos feedback path, two 2 - port transformers are used. The 2 - port transformer has symmetric structure and can be connected to enhance the quality factor of LC resonator. The simulated phase noise is -115dBc/Hz at the offset of 1MHz. The tuning range of 2.1GHz is achieved with the control voltage from 0V to 1.8V © 2006 IEEE.
- KSP Keywords
- CMOS Technology, Feedback Paths(FBP), LC resonator, LC tank, Low phase noise, Quadrature VCO, Quality-factor(Q-factor), Transformer feedback, Tuning Range, control voltage, symmetric structure