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Browsing by Author "Lee, Han-Jian"

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    A mismatch compensation circuit for CMOS quadrature VCO phase error
    (2007)
    Lee, Han-Jian
    ;
    Chen, Che-Sheng
    ;
    Wuen, Wen-Shen
    ;
    Wen, Kuei-Ann
    ;
    電子工程學系及電子研究所
    This paper presents an analysis of phase errors; in LC quadrature VCO with a common-mode model. A mismatch compensation circuit is proposed to alleviate phase errors due to common-mode transconductance mismatch. With the compensation circuit, quardature phase errors and image rejection ration rate (IRR) are improved about 1.5 degrees and 4.7dB, respectively. The compensation circuit consumes 1.1mW.