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A new fully integrated 0.25-µm CMOS complementary LC VCO with buffer with low phase noise, wide tuning range, and high frequency of merit is reported. The developed VCO achieves a 25% tuning range across 4.6–5.9 GHz, phase noise of −117 dBc/Hz at 1-MHz offset, and frequency of merit of 183.7. The integrated VCO has a die size of 320µm×300µm.
A fully integrated 10.5‐GHz divide‐by‐3 (1/3) injection‐locked frequency divider (ILFD) that can provide extra locking range is presented. The ILFD consists of a previously measured on‐chip 10.5‐GHz voltage controlled oscillator (VCO) functioning as an injection source, a 1/3 ILFD core, and an output inverter buffer. A phase tuner implemented using an asymmetric inductor is proposed to increase the...
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