标签: turning

combilnefilterturningwithansofthfss……

TurningtoDigitalCrystalsinGSMTransceiversTurningtoDigitalCrystalsinGSMTransceiversVC-TCXOmodulesbringasizeandcostpenaltytonext-generationGSMhandsetdesigns.Fortunately,DCXOsarchitecturesareemergingthatwilladdressessizeandcostconcernsinmobiles.Today,mostGSMhandsetsusevoltage-controlled,temperature-compensatedcrystaloscillator(VC-TCXO)modulesasthesystemreferenceoscillator.Toestablishandmaintainarobustwirelessconnection,thereferenceoscillatormustattainhighlevelsofprecisionandaccuracy.Sinceaccuracyovertimeiscriticalinawirelessphonedesign,thereferenceoscillatormustbeabletocompensateforbothstaticanddynamicerrors.VC-TCXOmodulesmeettheserequirementsthroughanalogtechniquestocorrectfrequencydevi……