psspnoise仿真.docx

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1、仿真电路如下图所示:IMWL9ChSrl*Sele(PCoucL9chSingleSelcctPt()M：SchHiMousePopUpORgoScroll(niL3*nil)首先仿真瞬态，设置如下:VirtuosoAnalogDesignEnvironment(1)Status:ReadyIlIlm-T-27CSimulator:spectreSessionSetiAnalysesVariablesOutputsSimulationResultsToolsHelpDesignUbraryPLL20120S0SCellvcoViewSchenaticAn包yses#TypeArgUMent8.

2、EnableDesignVariables1detyes2tranO100ncons.yesOutputs*NameValue#Hane/SignaLZExprValuePlotSaveMarch1.738GHottingmode:ReplaceResultsin.eftroject)18PLLexample/sknulaUon/vco/spectre/schematic接着设置.psstjEChsingAnalyses-VirtuosoAnalogDesignEnvironmetgOKCancelDefaults ApplyCBiriodiqSteady Stateyalvi5AAccura

3、cyDefaults(erpreset)conservativemoderateliberal_AdditjonaITimeforStabilization(tstab)0,SaveInitialTransientResults(saveinit)noyesSweepOptions.EnafiledPnoiSe仿真设置如下:CyChOOSMgAnalyses-VirtuosoAnalogDesignEnvironmet暨OKCancelDefaultsApplyPeriodicNoiseAnalysisPSSBeatFrequency(Hz)L7380SweeptypedefaultJRela

4、tiveHamTOniCOutputFrequencySweepRange(Hz)Start-Stop10MHZ)WarningfronapectrcduringPNoisean&Lysio,pnoise,maxsidebands,inanaLyaispnoise,hasthemu8allysmallvalueof3.ThisparametercontrolstheanountofnoisefoldingConsideredzusingtooSna11avaluedegradesaccuracyUsingtheoperating-pointInfornationgeneratedbyPSSan

5、alysidpnoisefreq=158.5Hc(4*),step=326Hzpnoie.freq-2S1.2Hspnoise：freq三SOI.2Hzpnoisefreq=7943Hzpnoisefreq-1SSkHzpnoise：freq2.512kHzpnoisefreq=5012kHzpnoisefreq=7943kHzpnoisefreq-IS.8SkHzpnoisefreq=25.12kHzpnoisefreq=50.12kHzpnoaefreq-79.43kHz(%),stop-SI.66Hz(14%),step103.1Hz(18*),step三163.4Hz(24%),ste

6、p-326Hz(28%step-516.6Hz(34%),step=1031kHz(38%),step三1634kite(44%),step-3.26kHz(48%),step三5.166kHz(S4%),step=1031kHz(S8%),stop-16.34kHzpnoise：pnoisepnoisepnoise：pnoisepnoisepnoise.pnoise：freq-1S8.Sfreq三2512freqeSOI.2freq794.3freq=1585freq三2512freq-S.012kHzkHzkHzkHzMHzMHzMHzMHz(64(68(74(78(84(8(94(98%

7、)?step-32.6kHz制，step%),stepstep),step%),step%)，step切,step三5166kHz-103.1kHz-163.4kHz三326kHz三516.6kH-1.031KHz三1.634KHz.freq7943.TotaltiMrequiredforpnoisewalysispnoisev32.3s8,%)*)*)%)%)*)*)%)*)*)*)%)*)*)%)*)*)%)%)%)3P22222222222222222222/l/l/l/l/t/l/i/l/i/l/l/l/%.可以看出振荡器的频率为1.78167GhzPnoise结果查看:DirectP

8、lotFormOKCancelHottingModeAppendAnatysisPSSpnoiseFunctionOutput Notse Noise RgUrB NFdsbNAeee Phase NotseInput Notse Noise FactorFdsbFleeeTransfer Function米c,观凿除0.00-50.060.0-90.0-120vco schematic : May 7 0 Periodic Noise Responsea: Phase Noise; dBcHz, Relative Harmonic = 110010K100K IMrelative frequ

9、ency ( Hz )10MAddToOutputsPressplotbuttononthisform.WaveformWindow27-VirtuosoAnalogDesignEnvironment(1):10.07Ky:-50.37PhaseNoise;dBcHz,RelativeHannonic=1ACtiVe56WindowZoomAxesCurvesMarkersAnnotationEditToolsA;(100.583K-70.36)delta:1954.246K-19.9927)8:11.00483M90.3527)slope:-22,侬8unoseLawvMoseSingLeS

10、elecMRBwCrossHairMenuBCBPressplotbuttonontheDirectPlotForm可以观察得到-70.36dBc/Hz100K-90.35JBc()lMEyeDiagram设置:VVirtuoseAnalogDesignEnvironment(1)Status:ReadyT-Z7CSimulator:spectreSessionSetupAnalysesVanatJlesOutputsSimuIatMmResultsoolsDesignAnalysesErPLL2012050S*型*a9uMen,8vcopao1.73M371/2noHelp q-C , IM

11、M JOCIH XYZVtewchMticEZDesignVariablesOutputs,IAcUve G2Vdow Zm AKeS Curves Markers Annotation CL AVV)CoUXSinglcSckc MR awFi tXcnCB ()首先瞬态仿真300ns,得到一个频率1.767G,但是这个频率计算有误差，我们采用前面pss迭代得到的的精确频率1.76187GWaveformWindow30-Virtuosoa;AnalogDesignEnvironment(1)PLL20120505vcoschematic:May707:42:432009TransientResponse选取一个波峰位置为眼图的开始触发点眼图结果:E)WaveformWindow30-VirtuosoAnalogDesignEnvironment(1)Active82WindowZoomAxesCurvesMarKersAnnotationEditToolsHelp/米Q%4三eaPLL20120505vcoschematic:May7