基于注入锁定的RF低功耗正交本振信号产生电路.docx 立即下载
2024-11-10
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基于注入锁定的RF低功耗正交本振信号产生电路.docx

基于注入锁定的RF低功耗正交本振信号产生电路.docx

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基于注入锁定的RF低功耗正交本振信号产生电路
Introduction:
Inmoderncommunicationsystems,theuseoflowpowerRFsignalshasbecomeincreasinglyimportantduetoitseffectivenessinincreasingthecommunicationrangeandreducingthepowerconsumption.Thelocaloscillator(LO)isavitalcomponentinanyRFcommunicationsystemasitgeneratestheRFsignalwhichismixedwiththemodulatedsignaltoproduceanintermediatefrequency(IF)signal.
Inthispaper,weproposeanewmethodofgeneratingalowpowerRFsignalusingtheinjection-lockedfrequencysynthesizer.Theproposedcircuitexploitstheadvantagesoftheinjectionlockingtechniquetoproduceahighlystableandlow-phasenoiseRFsignalwithlowpowerconsumption.
Injection-lockingtechnique:
Theinjection-lockingtechniqueisawell-knownmethodofgeneratingahighlystableandlow-phasenoiseRFsignal.Itinvolveslockingafree-runningoscillatortoastrongerexternalsignalorareferencefrequency.Thisensuresthatthefrequencyofthefree-runningoscillatorispreciselyequaltotheexternalsignal,makingthefrequencyoftheoscillatorhighlystableandpredictable.
RFsignalgenerationusinginjectionlocking:
Theproposedcircuitusesavoltage-controlledoscillator(VCO)asthefree-runningoscillatorandareferencefrequencyasthelockingsignal.TheVCOfrequencyiscontrolledbytheinjection-lockingofthereferencefrequency.
Theproposedcircuitconsistsofamixercircuit,abuffer,andaninjection-lockedVCO.Thereferencefrequencyisfedintothemixercircuitalongwiththemodulatedsignal.Theoutputofthemixeristhenfedintothebufferwhichamplifiesthesignaltoanappropriatelevel.ThebufferoutputsignalistheninjectedintotheVCOcircuitwhichisdesignedtooperateinaninjection-lockedmode.TheVCOfrequencyisthenlockedtothereferencefrequencyensuringthestabilityoftheoutputRFsignal.
Simulationresults:
TheproposedcircuitwassimulatedusingCadenceSpectreRFSimulationtool.ThesimulationresultsshowedthattheproposedcircuitproducesahighlystableRFsignalwithlowphasenoise.Thepowerconsumptionofthecircuitwasfoundtobelow,makingitsuitableforlow-powerapplications.
Conclusion:
Inthispaper,weproposedaninjection-lockedfrequencysynthesizercircuitforg
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基于注入锁定的RF低功耗正交本振信号产生电路

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