标签: 振荡器电路

晶体振荡器电路设计指南

ST微控制器振荡器电路设计南.rar

ST微控制器振荡器电路设计南.pdf

目录并联非调谐振荡器巴特勒费调谐振荡器1MHz米勒振荡器国际晶体OF-1HI振荡器1MHz标准晶体振荡器晶体控制正弦波振荡器晶体振荡器电容三点式振荡器高频调频振荡器陶瓷滤波振荡器调宽多谐振荡器

Operationalamplifier(opamp)oscillatorscanbeusedtoaccuratelymeasureresistiveandcapacitivesen-sors.Oscillatordesigncanbesimplifiedbyusingtheprocedurediscussedinthisapplicationnote.Thederi-vationofthedesignequationsprovidesamethodtoselectthepassivecomponentsanddeterminetheinflu-enceofeachcomponentonthefrequencyofoscilla-tion.Theprocedurewillbedemonstratedbyanalyzingtwostate-variableRCop-amposcillatorcircuits.MAN866DesigningOperationalAmplifierOscillatorCircuitsForSensorApplicationsTheratiooscillatorprovidesanoutputfrequencythatisAuthor:JimLepkowskiproportionaltothesquarerootoftheratiooftwocapac-MicrochipTechnologyInc.itors(i.e.,freq.∝(C4/C3)1/2).Theratiooscillatorcanbeusedtocanceltheeffectofafluid-levelsensorwithINTRODUCTION……

ThisapplicationnoteshowshowtodesignatemperaturesensoroscillatorcircuitusingMicrochip’slow-costMCP6001operationalamplifier(opamp)andtheMCP6541comparator.OscillatorcircuitscanbeusedtoprovideanaccuratetemperaturemeasurementwithaResistiveTemperatureDetector(RTD)sensor.Oscillatorsprovideafrequencyoutputthatispropor-tionaltotemperatureandareeasilyintegratedintoamicrocontrollersystem.RCoscillatorsofferseveraladvantagesinprecisionsensingapplications.OscillatorsdonotrequireanAnalog-to-DigitalConverter(ADC).Theaccuracyofthefrequencymeasurementisdirectlyrelatedtothequalityofthemicrocontroller’sclocksignalandhigh-frequencyoscillatorsareavailablewithaccuraciesofbetterthan10ppm.AN895OscillatorCircuitsForRTDTemperatureSensorsAuthor:EzanaHaileandJimLepkowskiRTDsserveasthestandardforprecisiontemperatureMicrochipTechnologyInc.measurementsbecauseoftheirexcellentrepeatabilityandstabilitycharacteristics.ARTDcanbecharacter-izedoverit’stemperaturemeasurementrangetoINTRODUCTIONobtainatableofcoefficientsthatcanbeaddedtothe……