| Citation: |
Li Zhisheng, Li Wei, Li Ning. Design of a 4.224GHz Quadrature LC-VCO[J]. Journal of Semiconductors, 2008, 29(2): 251-255.
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Li Z S, Li W, Li N. Design of a 4.224GHz Quadrature LC-VCO[J]. J. Semicond., 2008, 29(2): 251.
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Design of a 4.224GHz Quadrature LC-VCO
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Abstract
A 4.224GHz quadrature voltage-controlled oscillator (QVCO) applied in MB-OFDM UWB synthesizers is implemented in 0.18μm RF-CMOS technology.An improved structure of the QVCO is presented for better phase noise.A novel configuration of a MOS varactor is designed for good linearity of Kvco, as well as a new digital capacitor controlled array topology with lower parasitic capacitance and lower Ron.Measurement results show a phase noise of -90.4dBc/Hz at 100kHz offset and -116.7dBc/Hz at 1MHz offset from a carrier close to 4.224GHz.The power dissipation is 10.55mW from a 1.8V supply.-
Keywords:
- UWB,
- quadrature VCO,
- phase noise,
- varactor,
- DCCA,
- quadrature performance
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References
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Proportional views
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