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In this paper, an ultra-low phase-noise VCO operating from 2.619 to 2.996 GHz, destined for P2P backhaul communications, is proposed and realized in IBM 0.13-um SiGe process. The VCO uses a differential Colpitts topology with thick-oxide PMOS transistors. 5-bit digitally controlled capacitor array and hyper-abrupt varactors with MIM capacitors are employed for coarse and fine tuning, respectively,...
A fully integrated voltage-controlled oscillator (VCO) for IEEE 802.11a WLAN transceivers is proposed and implemented in 0.18 μm CMOS technology with 1.8 V supply voltage. The VCO core adopts the topology of complementary cross-coupled differential inductance-capacitance (LC) tank. The VCO operates from 4.56 to 4.77 GHz with the varactor control voltage (Vtune) changing from 0.3 to 1.5 V and has a...
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