电路Word文档下载推荐.docx
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电路Word文档下载推荐.docx
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1.电路图所示为二阶有源带通滤波器。
典型的带通滤波器可以从二阶低通滤波器中将其中一级改成高通而成,如图所示:
图中R3、C1组成低通网络,C2、R2组成高通网络,两者串联就组成了带通滤波电路。
这种滤波器的作用是只允许在某一个通频带范围内的信号通过,而比通频带下限频率低和比上限频率高的信号均加以衰减或抑制。
此电路的优点是改变R5和R1的比例就可改变频宽而不影响中心频率。
2.为了计算方便,设R3=R4=R,R2=2R,C1=C2=1000pF,已知:
中心频率:
f0=10kHz,带宽:
BW=4.7kHz由
0=1/(RC)=2
f0得:
R3=R4=R=1/(2
f0C1)=1/(2
取R3=R4=R=15.9K
则R2=2R=31.8K
另取R1=
由
得:
带入数据整理得:
30-10AVF=4.7,
所以AVF=2.53故R5=(AVF-1)
=(2.53-1)
=1.53
带宽分布仿真如下:
由图可知:
带宽median=4.408KHz与所给带宽差距大,若取AVF=2.5.则R5=(2.5-1)
=1.5K
仿真结果如下
由图可知:
带宽median=4.694KHz满足要求
综上所述,参数设置如下:
C1=C2=1000PF,R3=R4=15.9K
R2=31.8K
R1=1K
R5=1.5K
(1)根据参数设置,仿真电路图如下:
(2)分析参数设置如下:
(3)仿真结果如下:
(4)蒙特卡洛分析的分析结果如下:
中心频率的全部20次结果:
SectionNumberCenterFrequency(V(out),3)
19979.31156841505
210025.1081669197
310100.4301437876
410311.845416733
59731.16066171199
69782.84573039411
79989.7301966476
810044.8553883215
99950.70206970355
109832.68492353975
1110230.1940360622
129990.99447065075
139852.53569985326
149643.23240516119
15.0578*******
1610042.6898539263
179932.78852859456
189790.78339993646
199959.25798710057
209688.07478920269
带宽的全部20次结果:
:
SectionNumberBandwidth(V(out),3)
14710.97368243524
24635.23913261037
34878.66169817076
4.0599*******
54467.88837635983
64739.96148703902
74538.36022734744
84793.0341903743
94670.81417164001
104689.27323318614
114768.36630128284
124742.11699727783
134383.37830705354
144822.09491331266
154541.04480227816
164915.00676210874
174495.70129905042
184447.83643766861
194897.69571078543
204344.89882515078
节点电压的输出结果:
Frequency(V(out))@1(V(out))@2(V(out))@3(V(out))@4(V(out))@5(V(out))@6(V(out))@7(V(out))@8(V(out))@9(V(out))@10(V(out))@11(V(out))@12(V(out))@13(V(out))@14(V(out))@15(V(out))@16(V(out))@17(V(out))@18(V(out))@19(V(out))@20
1.000000000000e+0012.497461770408e-0032.454797161179e-0032.510874922514e-0032.433790238089e-0032.560662256816e-0032.473414587689e-0032.464965099331e-0032.491996307087e-0032.561527223397e-0032.511885184626e-0032.481098172600e-0032.485082865509e-0032.526087103650e-0032.617712607341e-0032.581386305082e-0032.391755270584e-0032.638182505513e-0032.565620374027e-0032.481687991446e-0032.591510442452e-003
1.023059729843e+0012.555052688137e-0032.511404367809e-0032.568775040154e-0032.489912923381e-0032.619710694735e-0032.530450905009e-0032.521806765805e-0032.549461263670e-0032.620595451985e-0032.569808586002e-0032.538311669969e-0032.542388100162e-0032.584338094172e-0032.678076544685e-0032.640912513264e-0032.446908684915e-0032.699018383242e-0032.624783131033e-0032.538914997053e-0032.651270177189e-003
1.046651210825e+0012.613971673606e-0032.569316591831e-0032.628010443343e-0032.547329682970e-0032.680120728032e-0032.588802484536e-0032.579959037565e-0032.608251261211e-0032.681025741619e-0032.629067738634e-0032.596844620212e-0032.601015116137e-0032.643932286280e-0032.739832345834e-0032.701811259989e-0032.503333822013e-0032.761257300131e-0032.685310044502e-0032.597461921479e-0032.712407805394e-003
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1.146584167576e+0012.863550884623e-0032.814632432640e-0032.878930064533e-0032.790546085955e-0032.936015937754e-0032.835978661583e-0032.826290715353e-0032.857284485548e-0032.937007331845e-0032.880088644563e-0032.844788652021e-0032.849357298572e-0032.896372276827e-0033.001428678698e-0032.959777507356e-0032.742349509821e-0033.024899245744e-0032.941700713982e-0032.845464880092e-0032.971385921619e-003
1.173024088722e+0012.929583788351e-0032.879537269450e-0032.945317570561e-0032.854895620524e-0033.003719634724e-0032.901375940933e-0032.891464470635e-0032.923172801796e-0033.004734079148e-0032.946502694291e-0032.910388720748e-0032.915063075430e-0032.963162109851e-0033.070641127694e-0033.028029523171e-0032.805587515414e-0033.094652782141e-0033.009535726297e-0032.911080787403e-0033.039905455969e-003
1.200073707306e+0012.997139407119e-0032.945938744095e-0033.013236173619e-0032.920728754331e-0033.072984929488e-0032.968281034392e-0032.958141150115e-0032.990580573479e-0033.074022657084e-0033.014448539611e-0032.977501725427e-0032.982283651099e-0033.031491887161e-0033.141449401255e-0033.097855244164e-0032.870283742022e-0033.166014948014e-0033.078934897466e-0032.978209631096e-0033.110004981652e-003
1.227747082788e+0013.066252898538e-0033.013871548514e-0033.082720565663e-0032.988080179310e-0033.143847212493e-0033.036728866757e-0033.026355212896e-0033.059542725381e-0033.144908921761e-0033.083961105315e-0033.046162357997e-0033.051054648853e-0033.101397464848e-0033.213890752519e-0033.169290992117e-0032.936471950277e-0033.239022530785e-0033.149934549250e-0033.046886568800e-0033.181721053260e-003
1.256058598832e+0013.136959885896e-0033.083370840320e-0033.153807534140e-0033.056984587404e-0033.216343736843e-0033.106755294164e-0033.096142282248e-0033.130095113621e-0033.217429893452e-0033.155076713194e-0033.116406241728e-0033.121411226319e-0033.172915164672e-0033.288002434641e-0033.242374252977e-0033.004186366488e-0033.313713714873e-0033.222571469087e-0033.117147223818e-0033.255090923892e-003
1.285022970787e+0013.209297622308e-0033.154472708460e-0033.226533633681e-0033.127478067555e-0033.290511988488e-0033.178396405592e-0033.167538679942e-0033.202274525654e-0033.291623290939e-0033.227832150716e-0033.188269931228e-0033.193390403781e-0033.246082006902e-0033.363823097776e-0033.317142745541e-0033.073462381128e-0033.390127383202e-0033.296883375749e-0033.189027917963e-0033.330152545151e-003
1.314655253335e+0013.283303360903e-0033.227214173219e-0033.300937048747e-0033.199597174380e-0033.366390617543e-0033.251689687024e-0033.240581659091e-0033.276118447445e-0033.367527531507e-0033.302265136684e-0033.261790679610e-0033.267029434371e-0033.320935943139e-0033.441392090593e-0033.393635585604e-0033.144335850351e-0033.468302884372e-0033.372908919348e-0033.262566370044e-0033.406945265640e-003
1.344970848313e+0013.359015751813e-0033.301633186219e-0033.377055963813e-0033.273379161002e-0033.444018972636e-0033.326673090118e-0033.315308705647e-0033.351665063464e-0033.445181963785e-0033.378414786906e-0033.337006904155e-0033.342366502560e-0033.397516089156e-0033.520749925932e-0033.471892121808e-0033.216843561646e-0033.548281429644e-0033.450687448501e-0033.337800298893e-0033.485508899637e-003
1.375985512721e+0013.436474143677e-0033.377768164761e-0033.454930193190e-0033.348862677542e-0033.523437333732e-0033.403385497876e-0033.391759168228e-0033.428953722353e-0033.524627333399e-0033.456320450036e-0033.413957720652e-0033.419440724157e-0033.475862259231e-0033.601937815147e-0033.551953332630e-0033.291023233846e-0033.630103997464e-0033.530259708828e-0033.414769518831e-0033.565883959931e-003
1.407715366912e+0013.515718583644e-0033.455658923144e-0033.534600249697e-0033.426086839801e-0033.604687144968e-0033.481866957471e-0033.469972395466e-0033.508024704095e-0033.605904385997e-0033.536022638902e-0033.492682943398e-0033.498292379145e-0033.556014966151e-0033.684997900938e-0033.633860662229e-0033.366913749953e-0033.713813661773e-0033.611666911627e-0033.493513378541e-0033.648112589142e-003
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1.507362899294e+0013.764585660604e-0033.700274498016e-0033.784804014697e-0033.668609260328e-0033.859852294059e-0033.728337760889e-0033.715601476663e-0033.756347425093e-0033.861155683034e-0033.786326992694e-0033.739919490540e-0033.745925920441e-0033.807734665607e-0033.945847666325e-0033.891090802225e-0033.605247341133e-0033.976703423917e-0033.867325887797e-0033.740808635200e-0033.906351794166e-003
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