A multiple-crystal interface PLL with VCO realignment to reduce phase noise
Abstract—Anenhancementtoaconventionalinteger-phaselockedloop(PLL)isintroduced,analyzed,anddemonstratedexperimentallytosignificantlyreducevoltage-controlledoscillator(VCO)phasenoise.Theenhancement,whichinvolvesperiodicallyinjectionlockingtheVCOtoabufferedversionofthereference,hastheeffectofw
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