具有稳定工作状态的无线接收用超再生振荡器(6)

第8期王 欢等: 具有稳定工作状态的无线接收用超再生振荡器

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6 结论

采用0 5 mCMOS工艺成功实现了由超再生振荡器、包络检波器、比较器、电荷泵和低通滤波器等构成的具有闭环控制功能的超再生振荡器.测试结果表明,该振荡器具有稳定的起振状态,与工艺、温度和电源电压等几乎无关,极大的方便了超再生无线接收机的调试和应用,适合于大规模生产.参考文献

[1] ArmstrongEH.Somerecentdevelopmentsofregenerativecir

cuits.ProcIRE,1922,10:244

[2] DehollainC,DeclercqM,JoehlN,etal.Aglobalsurveyonshort

rangelowpowerwirelessdatatransmissionarchitecturesforISMapplications.ProceedingofInternationalSemiconductorConfer ence,2001,1:117

[3] FrinkFW.Thebasicprinciplesofsuperregenerativereception.

ProcIRE,1938:76

[4] ChenJY,FlynnMP,HayesJP.Afullyintegratedauto calibrated

super regenerativereceiverin0 13 mCMOS.IEEEJSolid StateCircuits,2007,42:1976

基于图2所示超再生振荡器设计的315/433MHz无线接收机在不同的电源电压条件下(2 5~5 5V),工作正常,能正确接收和解调基带数据,图14是在电源电压分别为2 5和5V时接收得到的数据信号,经过与商用控制电路联调,证明经过接收并解调后得到的该数据是正确的.

AStableSuper RegenerativeOscillatorforWirelessReceivers

WangHuan1, ,WangZhigong1,XuJian2,MengQiao1,YangSiyong2,andLiWei1

(1InstituteofRF &OE ICs,Nanjing 210096,China)(2JiangsuSino ChipOE ICCo.,Ltd,Nanjing 210016,China)

Abstract:Astablesuper regenerativeoscillator(SRO)forindustrialscientificandmedicalwirelessreceivershasbeenimplementedinstandard0 5 mCMOStechnology.ThestartuptimeoftheSROislockedbyaloopcomposedofavoltage controlledSRO,aneffi cientenvelopedetector,andanaccuratechargepump,whichissimilartoaphase lockedloopwithoutinputclock.Thispaperpresentsadiscretemodelwithstabilityanalysisandthekeycircuitsoftheloop.Undera2 4~5 5Vsupply,themeasuredresultsindicatethatthestartuptimeoftheSROisindependentofchangesintechnology,temperature,operatingfrequency,andsupplyvoltage.Keywords:super regenerativeoscillator;startuptimeofoscillator;phase lockedloop;wirelessreceiverEEACC:1230B

ArticleID:0253 4177(2008)08 1608 06

Correspondingauthor.Email:wanghuan@

2008,revisedipt29March2008ChineseInstituteElectronics