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第二章选频网络注意：①有部分答案有差异；②3-1题是2-1题；③只有计算题答案和部分问答题；④答案不齐全。
(pF)).(L C H)(.QR L ΩR Δf f Q (kHz)Δf MHz:f ..159101*********11591014321010010100101010121010990101211362620603670036700=××××===×××====××===×−×==−−ωµω, .C L ωC L ) (, .C L ωC L ) ( , .C L ωC L ) :(22021101220211012202110111311211123======−ωωωR R C L R )LCωL(jωR )LC ωLR(jωC L R C jωR L jωR )C jωL)(R jω(R :Z =+=−+−++=+++++=−2112111133220020020000)()()()()())()()()())318010404501053514321121535100160512405354501605151431223202222μH .C C LpF - C C CpFC C C:=×+××××=′+==+=×+=+=×+−−ω。
L C C ’()()()()mV V Q V V mA .R V I μH ..C L ..R C :Q -Sm Com Lom -om om --21210121220510111210100105114321121251010010511432115330312260200126000=××====×===××××===××××××==−ωω()()()()()()Ωj ..j .C j R Z Ω.....Q L Q L R pF C pF .L C C C C .V V Q μH .C :L X X X X X X X S C 7967471020010143217471747100102531014321052102531014322001001025310143211100101025310100101432116312606666000626200122620−=××××−=−==××××−××××=−==→=××××==+⋅====××××==−−−−−−ωωωωω()()().21kΩ0.5R,R , 0.5Q Q , f 22f 2Δ320105105552310023100101501052220105010514321173000.70.7660036700012620电阻所以应并上=′=′∆×=′=××−××===××===×××××==−−.f Δf Q ξΔf f Q μH ..C ω :L .∑===−g QCωΔf f C πf C πΔf :..070007022483()()()()()()()()MHz ...Q f Δf .....L ωR Q kΩ..R C C C C R R R kΩ..C LQ R MHz ....LC πf pF .C C C C C C C :C L .L P i P i 4812281064122281080106411432108858855202020209201092010202010801006411031810801432121318202020202020593607066302211021261201260102102=×===××××××===×⎠⎞⎜⎝⎛++=⎟⎟⎠⎞⎜⎜⎝⎛++==×+××===××××===++++=++++=−−∑∑−−−−)))RZ 30Z 20Z 1123f1f1f1===−解：)()()()())()()()()()()))())()()()()()()Ω.j .j ..Z M Z j ..j C L j R Z pF .L C kHz .R ρf Q f Δf .R R L Q kΩC R R L Z Ω..R M Z μH ..ηR M pF .L C C μH .ρL L :f .f f f P 8437680100201018310143210020101771014321101591014322011771015910950143211522810201022224252020101591014323251015920201015920201018310143221831014322011591015910143211159101432101133266222011126662*********2322022361100706611101112611112662201160116261201216301121−=+××××==+=⎟⎠⎞⎜⎝⎛××××−××××+=⎟⎟⎠⎞⎜⎜⎝⎛′−+==×××××=′=′=××====+××××=+==××+×=+==××××===×××===××××====××===−−−−−−−−−−ωωωωωωωωω()100101410222002010159105010159153367.00111236=×=∆==→=∴=Ω=××××==−−−f f Q M R R C R L R f P ∵解：)()()()()()()()))013.02001122211222005101001032510102402051010010205101011632207.067101671012671120126722011=×−×+=⋅−+=∆=××===×==Ω=+××=+=Ω=×==−−−−−Q f f R L Q R M k R RL R R M R :f ab f ηηωωηωω5.75.22303021103001010112118.111020*********.325.22115.2225.111030010101121117323320012302332=−=′−=→=⎟⎟⎠⎞⎜⎜⎝⎛××+=⎟⎟⎠⎞⎜⎜⎝⎛∆+==××××××===′→=⎟⎟⎠⎞⎜⎜⎝⎛××′+=⎟⎟⎠⎞⎜⎜⎝⎛∆′+=−−Q Q Q Q f f Q I I C Q R Q Q f f Q I I :ω()⎩⎨⎧==→⎪⎪⎩⎪⎪⎨⎧+==−μL μH L CL L ω C L ω :12537511218321212第三章高频小信号放大器5102501050501501 ,5012.1102501020501501 ,20491025010501501 ,154266200266200266200=⎟⎟⎠⎞⎜⎜⎝⎛×××+=⎟⎟⎠⎞⎜⎜⎝⎛+===⎟⎟⎠⎞⎜⎜⎝⎛×××+=⎟⎟⎠⎞⎜⎜⎝⎛+===⎟⎟⎠⎞⎜⎜⎝⎛××+=⎟⎟⎠⎞⎜⎜⎝⎛+==−TT T f f ββMHz f f f ββMHz f f f ββMHz f βββ当当解：当()()()()()()()()()()()()()()()()()()()()mS j .j .j b a jb a g r C j b a jb a C j g g r C j g y mS j .j b a jb a g y mS j .j .j b a jb a C j g y mS .j ..j .j b a jb a C j g y ..r ωC b .g r a pF ..πf g C mS ..r βg mS .βI g m b b c b c b c b m b b c b ce oe m fe c b c b re e b e b ieb b e b e b b b T m eb eb m E e b 68.0049.01011.01107.377011031014321733.3327.371011.01107.37187.00187.01011.0110310143241189501011.01102410143210754.010701024101432110754070112410250143210737273710754050754015026112674223127222222322221272222127322127363300+=⎟⎠⎞⎜⎝⎛+−×××+××××≈⎟⎠⎞⎜⎝⎛+−+≈+−+++=−=+−××=+−=−−=+−×××××−≈+−+−=+=+−×××××+×=+−+=≈×××××==≈××+=+==××××===××===+×=+=−−−′′′′′′−−′′−−′′−′′−′′−′−′′ωωωωω解：()()()()4124142701010042104010041704070121101241104221104210124212422124284−−=⎟⎟⎠⎞⎜⎜⎝⎛−⎟⎟⎠⎞⎜⎜⎝⎛−==⋅⎟⎟⎠⎞⎜⎜⎝⎛−==⎟⎟⎠⎞⎜⎜⎝⎛+=⎟⎟⎠⎞⎜⎜⎝⎛⋅⎟⎟⎠⎞⎜⎜⎝⎛−==⎟⎟⎠⎞⎜⎜⎝⎛+=⎠⎞⎜⎜⎝⎛−m mm m ...r m .m.m vo v m .m.mvo v Δf Δf K Q f Δf f ΔfQ A A Q f Δf f Δf Q A A 故得令得解：令()()()()()()()()()1103101045952110830081020010286021830082501020025010237952258854tan 2tan 431100316116570316107102316104107102105228113151********5228104525025052281028604110200411023723710410010710211250205250205943326662262621222206070666022632162626222166001345213231>>××+×+×××=+′++=××+×=+=′−=−−=+==⎟⎠⎞⎜⎝⎛−=⎟⎟⎠⎞⎜⎜⎝⎛−==×===××××××======××××===××+××+×=++==×××××========−−−−−−−−−−−−−−−−−∑−...y y ξg g g g S μS ....p g p g g ..ξ..Q Q K MH ...Q f Δf ..π.L ωg Q ..A A ....g y p p A μS ..g p g p g g μS ..πL Q ωg .N N p .N N p refe L oe ie s ie p L oo re fe L Z L .ΣL vo po Σfe vo ie oe p p ϕϕ解：()()()()()()()()()()()()()()()()()()()()7221698266804238225025668042479479610444454782122259044546104422610441222565197445412212243822502578213445410158010410710143222782115802438303015801503008203010037010370104107101432100111104444447070707041707041704147044436260070222122222156600..-.A A ..A A ....f ΔΔf A A kHz ...Δf f ΔkHz .Δf f ΔkHz ..Δf Δf ..A A kHz ....f Lg ωΔf .....g y p p A mS .......g p g p R g g mS ...L ωQ g vo vo vo vo ..vo vo ......vo vo .fe vo ie oe p p ==′−==′=′=×=′=′=−=−′=−=′=×−=⋅−=====×××××××===+××===×+×++=+++==××××××==−−−∑∑∑−解：()()()()不能满足解：9.1K 522106250110511432121625011830500114r0.1122620221<=×××××===×+=+=−−∑∑μH ....C πf L pF ..C p C C oe ()74.73.05.24.364.265.2144220=×+==−refeS vo C y A ω解：()()()()()()()163910601046522260104910100410465274104921040574513114910010100010465210620574513491001010001046521020100440574513100010044100012051373118607311873118118101000104652111741030706123121206321123320202236123601012222236112563423612231201.K kH .Q f Δf πg C ωQ ..g y p p A μS π...Q C ωg p g μS πQ C ωg g pF ..C p C C pF C C C .L L L L μH πC ωL .r Z L .L fe vo i o i o ==××===×××××===×××××===∴=××××+××⎟⎠⎞⎜⎝⎛=+==××××+×=+==×⎟⎠⎞⎜⎝⎛+=+==+=+==×+×+=++==××××==−−−−−−−−−−，则。
