Abstract
The design of a 1.76–2.56 GHz CMOS voltage-controlled oscillator (VCO) with switched capacitor array and switched inductor array is presented. Fabricated in 0.18 μm 1P6M CMOS technology, the VCO achieves a 37% frequency tuning range. The measured phase noise varies between −118.5 dBc/Hz and −122.8 dBc/Hz at 1 MHz offset across the tuning range. Power consumption is about 14.4 mW with a 1.8 V supply. Based on a reconfigurable LC tank with switched capacitor array and switched inductor array, the tuning range is analyzed and derived in terms of design parameters, yielding useful equations to guide the circuit design.
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