A quadrature VCO with +/- 50% tuning continuous tuning range is presented. It is based on a core LC-QVCO with +/- 20% tuning range, a single sideband mixer, two frequency dividers and a multiplexer. The circuit has been implemented in a 0.13 um 1.2 V CMOS technology. The additional area with respect to the core LC-QVCO is 100x100 um. Quadrature error is less than 2°; the phase noise is less than -120 dBc/Hz @ 1 MHz offset over the whole tuning range and is mainly due to the LC-QVCO. Spurs are more than 34 dB below the fundamental in the worst case.
A 0.83-2.5 GHz Continuously Tunable Quadrature VCO
GUERMANDI, DAVIDE;TORTORI, PAOLA;FRANCHI SCARSELLI, ELEONORA;GNUDI, ANTONIO
2005
Abstract
A quadrature VCO with +/- 50% tuning continuous tuning range is presented. It is based on a core LC-QVCO with +/- 20% tuning range, a single sideband mixer, two frequency dividers and a multiplexer. The circuit has been implemented in a 0.13 um 1.2 V CMOS technology. The additional area with respect to the core LC-QVCO is 100x100 um. Quadrature error is less than 2°; the phase noise is less than -120 dBc/Hz @ 1 MHz offset over the whole tuning range and is mainly due to the LC-QVCO. Spurs are more than 34 dB below the fundamental in the worst case.File in questo prodotto:
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