J. Semicond. > 2008, Volume 29 > Issue 2 > 251-255

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Design of a 4.224GHz Quadrature LC-VCO

Li Zhisheng, Li Wei and Li Ning

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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.

Key words: UWBquadrature VCOphase noisevaractorDCCAquadrature performance

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    Received: 18 August 2015 Revised: 13 October 2007 Online: Published: 01 February 2008

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      Li Zhisheng, Li Wei, Li Ning. Design of a 4.224GHz Quadrature LC-VCO[J]. Journal of Semiconductors, 2008, In Press. Li Z S, Li W, Li N. Design of a 4.224GHz Quadrature LC-VCO[J]. J. Semicond., 2008, 29(2): 251.Export: BibTex EndNote
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      Li Zhisheng, Li Wei, Li Ning. Design of a 4.224GHz Quadrature LC-VCO[J]. Journal of Semiconductors, 2008, In Press.

      Li Z S, Li W, Li N. Design of a 4.224GHz Quadrature LC-VCO[J]. J. Semicond., 2008, 29(2): 251.
      Export: BibTex EndNote

      Design of a 4.224GHz Quadrature LC-VCO

      • Received Date: 2015-08-18
      • Accepted Date: 2007-07-11
      • Revised Date: 2007-10-13
      • Published Date: 2008-01-31

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