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This letter presents an integrated direct-injection locked quadrature voltage controlled oscillator (VCO), consisted of a 5-GHz VCO integrated with injection locked LC frequency dividers for low-power quadrature generation. The circuit is implemented using a standard 0.18-mum CMOS process. The differential VCO is a full PMOS Colpitts oscillator, and the frequency divider is performed by adding an...
A new fully integrated, dual-band voltage controlled oscillator (VCO) is presented. The VCO is implemented in 0.18mum CMOS technology with 1.8V supply voltage. The circuit allows the VCO to operate at two resonant frequencies with two LC tanks. This VCO is configured with 2.4 GHz and 4.8 GHz frequency bands with differential outputs. The dual-band VCO operates at 2.15GHz ~ 2.75GHz and 4.75GHz ~ 4...
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