1RFIC/IMS2008WSB-3©AryaBehzadRFIC/IMS2008WSB-3©AryaBehzadWSL-3CalibrationTechniquesforWirelessSoCsAryaBehzadBroadcomCorporationSanDiego,CA2RFIC/IMS2008WSL-3©AryaBehzadOutline•WhyCalibrate?•CalibrationTechniques–ResistorCalibration–RCTimeConstantCalibration–VCOCalibration–AutomaticFrequencyControl(AgileFrequencyOffsetCalibration)–QuadratureErrorandLOFeedthroughCalibration–LOGenerationAmplitudeControlSystemandCalibration–OtherCalibrations•ProcessSensingandCalibration•TemperatureSensingandCalibration•PowerDetectorCalibration3RFIC/IMS2008WSL-3©AryaBehzadCalibrations&“Support”Circuitry•Radioself-calibrationsusedtobeconsideredas“nicetohave”.Todayradioself-calibrationshavebeenrecognizedasabsolutelyessential.•Designofthecalibrationalgorithmsandmethodologyisanintegralpartoftheradiodesign,andnotanafter-thought•Chiplevelandsystemlevelauto-calibrationisrequiredforovercomingdifficultiesofintegratedradiodesign,increasingchipandsystemyieldandimprovingperformance.•Someexamples:•VCOtuning•TxandRxIQCalibration•R-Calibrationonbandgapblocks•RCtimeconstantcalibration•RSSIs•Agilecenterfrequencycorrection•Integratedtemperaturesensor•TransmitLOfeedthroughcancellation•TSSI•RxDCOffsets&High-PassCorners•Processsensing4RFIC/IMS2008WSL-3©AryaBehzadToday’sRadio/RFTechnology•MultipleFrequencyBands,SimultaneousOperationformultiplestandards&Applications(WLAN,Bluetooth,RFID,…)•RapidRealTimeconfiguration/calibration:–OptimumPerformances–Max/BestYields–MultipleFab/Process,Package–NoFactoryCalorPre-StoredCaldataneeded,NoFlashorSRAM–ReduceRFtesttime–Compensateovertemperature(whichfactory-caldoesnotallowfor)DSPProcessorProgramming/CalibrationBasebandPLL/LOGENAFERXAnalogRXAFETXAnalogTXRFRXRFFERFTXPARFFE5RFIC/IMS2008WSL-3©AryaBehzad•RadioBlocksaredevelopedusingadigitallycontrollablematrixof–Passivedevices(R,L,C)–Activesdevices–ADCs&DACs–SmallControllers/DSPsRadioCalibrationTechnologySwitchingResistor&CapacitorsIT/RcontrolGainsettingLNAcontrolDigitalLog...
