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Current reuse cross-coupling CMOS VCO using the center-tapped transformer in LC tank for digitally controlled oscillator
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- Authors
- Young Jae Lee, Seok Bong Hyun, Cheon Soo Kim
- Issue Date
- 2008-06
- Citation
- Radio Frequency Integrated Circuits Symposium (RFIC) 2008, pp.549-552
- Publisher
- IEEE
- Language
- English
- Type
- Conference Paper
- Abstract
- A current reuse cross-coupling transformer-based VCO with low phase noise and low power consumption was implemented in 0.13μm CMOS. The oscillation frequency was tuned from 46GHz to 6GHz (26% tuning range) using two different-sized varactor that adjusted fine and coarse tuning. The measured phase noise at 5.0GHz was -124dBc/Hz (1MHz offset) and maximum output power level was -5.5dBm. The 0.4×0.3mm2 core consumes very low power of 1.8mW for 1.2V and FOM has -196.2dB. © 2008 IEEE.
- KSP Keywords
- CMOS VCO, Center-tapped transformer, Coupling transformer, Digitally controlled oscillator, LC tank, Low phase noise, Oscillation Frequency, Power Levels, Tuning Range, coarse tuning, cross-coupling