10-基于Multisim的高通滤波器的仿真分析

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Multisim曾凡,黄娟,李勇峰,张伟敬(西藏大学工学院,西藏拉萨850000):高通滤波为实现高频信号能正常通过,而低于设定临界值的低频信号则被阻隔、减弱。但是阻隔、减弱的幅度则会依据不同的频率以及不同的滤波程序而改变。文中阐述了对电压转移函数推导分析及电路性能的要求,并利用Multisim仿真软件对其频幅特性的分析进行。:高通滤波;Multisim;频幅特性:TN713:A1674-6236(2013)02-0108-03Designandsimulationofahigh-passfilterbasedonMultisimZENGFan,HUANGJuan,LIYong-feng,ZHANGWei-jing(SchoolofEngineering,TibetUniversity,Lhasa850000,China)Abstract:Thehigh-passfilterfortherealizationofhigh-frequencysignalscanpassnormally,whilethelower-frequencysignalswerebelowthesetthresholdbarrier,weakened.Butthebarrier,weakeningthemagnitudewillchangedependingonthefrequencyandthedifferentfilteringprogramdesign,thepaperdescribesthederivationofthevoltagetransferfunctionanalysisandcircuitperformancerequirementsanalysis,andMultisimsimulationsoftwareanalysisofitsfrequencycharacteristicsbedemonstrated.Keywords:high-passfilter;Multisim;magnitudecharacteristics:2012-09-18:201209131:西藏自治区大学生创新性实验训练计划项目(2011CX038);西藏大学青年科研培育基金项目(ZDPJZK201205):曾凡(1991—),男,湖南凤凰人。研究方向:电路与系统设计。,,。,。,,,,。RC()。Multisim(InteractiveImageTechnologies,IIT)Windows,/。、,。Multisim,。1,n:T(s)=VoVianSnS″+an-1Sn-1+…a1S+a0=an1+an-1Sn-1+an-2S-2+…+a1S1-n+a0S-n(1)(1)(2)。H(s)=U觶out(s)U觶in(s)=n/2k=1仪Aks2+aks+bk(2)b0=1,k=1,2,……,:ak=2sin(2k-1)π2n,bk=1(3)Ωs=ωr/ωs=6,:n=lg(100.1αmin-1)21gΩs≈1.93=2(4):H(s)=Kb0S2b0s2+2b1ζω0S+1(5)(5):H(jw)=H(s)s=jw=-(wRC)2-(wRC)2+j2wRC+1=11-j-2wRC-(1wRC)2=|H(jw)|ej准(w)(6):w0=1RC,|H(jw)|=1(1-(w0w)2)2+(2w0w)2姨ElectronicDesignEngineering21Vol.212No.220131Jan.2013-108-Q=12,,|H(jw)|=12姨。ω0=1CR1R2姨,ξ=R1R2姨。2Multisim10,,,。1。1Multisim,C1、C2,R1、R2。。3,:U+=U-,I+=I-=01:(jwc1+jwc2+1/R2)U觶1-jwc2U觶2-1/R2U觶3-jwc1U觶4=0(7)2:(1/R2+jwc2)U觶2-jwc2U觶1=0(8),:U觶2=U觶+=U觶-=0(9):U觶2=U觶3=U觶0,U觶4=U觶i(10)(12),:U觶0U觶i=C1C2R1R2S2C1C2R1R2S2+(C1R2+C2R2)+1(11)s=jω,s2=(jω)2,(3)。:C1C2R1R2=kbC1R2+C2R2=姨a(12)C1=C2=ζω0姨姨1R1,R2=1ζ2姨姨1R1C1=C2=1F,,(3):K=1,n=2a=2姨,b=1,:C1=1,R1=1.414,R2=0.707,C2=1:C1=0.1μF,C2=0μF,R1=3715Ω,R2=1876Ω。,。4(6):ωc=3842rad/s(fc=650Hz);:αmax=2.5dB;:ωc=628rad/s(fs=100Hz);:αmin=30dB。51)IF,IF、。2Fc=650Hz,αmax=2.5dB。2)3Fc=650Hz,αmin=30dB。2IF,。6:1)f=650Hz3(2)Fig.3Amplitude-frequencycharacteristics(2)2(1)Fig.2Amplitude-frequencycharacteristics(1)1Fig.1Circuitoffilter曾凡,等基于Multisim的高通滤波器的设计与仿真分析-109-《》2013年第2期4。4650Hz,,,。2)f=300Hz5。5300Hz,,。3)f=100Hz6。6100Hz,0,,。7Multisim,,(600Hz),;(200~500Hz),;100Hz,。,1,,。8。13。,。,,,。,,。,Multisim。:[1]郑园,杨勇,贾东亮,等.压控电压源二阶巴特沃斯高通滤波器的优化设计[J].电子技术,2012(2):34-36.ZHENGYuan,YANGYong,JIADong-liang,etal.Optimaldesignofvoltage-controlledvoltagesourcesecond-orderunitgainbutterworthhigh-passfilter[J].ElectronicTechnology,2012(2):34-36.[2]张晶,李心广.基于multisim的电路设计与仿真[J].计算机仿真,2005(5):109-110,152.ZHANGJing,LIXin-guang.Multisimbasedschematicdesignandsimulation[J].ComputerSimulation,2005(5):109-110,152.[3]李富才,董丽静,何正嘉.巴特沃斯小波构造与应用研究[J].西安交通大学学报,2002(7):713-716.LIFu-cai,DONGLi-jing,HEZheng-jia.Researchonconstructionandapplicationofbutterworthwavelet[J].JournalofXinanJiaotongUniversity,2002(7):713-716.[4]王少夫.调制系统中带通滤波器的设计与应用[J].微处理机,2005(6):64-65.WANGShao-fu.Thebasspassfilterdesignedandappliedinmodulationsystem[J].Microprocessors,2005(6):64-65.[5]郗艳华,张玉叶.高通滤波器分析及其仿真[J].信息技术,2011(8):29-31.XIYan-hua,ZHANGYu-ye.Analysisandsimulationonhigh-passfilter[J].InformationTechnology,2011(8):29-31.[6]赵清明,张青.低损耗宽带高通滤波器[J].低损耗宽带高通滤波器,1996(8):127.ZHAOQing-ming,ZHANGQing.Broadbandhighpassfilterwithextralowloss[J].ActaElectronicaSinica,1996(8):127.6100HzFig.6Waveformof100Hz5300HzFig.5Waveformof300Hz4650HzFig.4Waveformof650Hz-110-

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