Abstract
A wide-tuning-range and low-phase-noise LC voltage controlled oscillator (VCO) is presented in this paper. With the variable current source and source damping resistor, the proposed VCO exhibits a phase noise of -115dBc/Hz at 1MHz offset from 6 GHz carrier, and a power dissipation of 1.4mW. In addition, its tuning range is from 4.9 to 6.9 GHz with the MIM capacitor bank and differentially controlled varactors. The capacitor bank is used for wide tuning range and the differentially controlled varactors are useful for suppressing power supply noise.
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