射频模拟电路答案

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1、ᇘ乥῵ᢳ⬉䏃д乬㾷ㄨᓴ⥝݈ᴼ⥝ṙ㓪㓪㓪⬉ᄤᎹ⿟ᄺ䰶ѠѠѠ䳊䳊ϝᑈकѠ᳜Ѡ䳊䳊ϝᑈकѠ᳜д乬ϔ1ü1䆒䅵ϔϾᑊ㘨䇤ᤃಲ䏃ˈᏆⶹ䇤ᤃ乥⥛f=1MHzˈ㽕∖ᇍ990kHzⱘᑆP
ᡄো᳝䎇໳ⱘᡥࠊ(α=0.1)DŽ䆒ো⑤ݙ䰏R=50Ω,䋳䕑⬉䰏R=2kΩDŽsL

VV(990kHz)
㾷˖α=
=
=0.1C1L1VV(1000kHz)ppC2Rp
LR2IssRL
1α==0.12∆f21(+Q)Lf0∆=ff−f=10kHzQ=497.501L''2'2C1L1I=I/pR=R/pR=R/pp=p=ss1ss1LL212C+CL+L12121পL=50uH߭C==507pF2

2、ωL0122−6Q==497.5⇒G+pG+pG=6.410×sL''P1s2LωLG(+G+G)PPsL−3G=0.02sG=0.510×s䆒p=0.01p=0.08sL12−6L6G=1.210×sR==0.83310×Ω⇒=r0.12ΩPPCr1
䅼䆎˖1˅LǃCϡড়⧚ˈⳳℷⱘLCಲ䏃䖒ϡࠄα=0.1ⱘᡥࠊ↨˗2˅ৃ䞛⫼݊ᅗᔶᓣⱘ䇤ᤃಲ䏃DŽ1ü2᳝ϔϾᑊ㘨䇤ᤃಲ䏃Ꮉ԰ѢЁ⊶乥↉535kHzü1605kHzDŽ⦄᳝ϸϾৃব⬉ᆍˈϔϾব࣪㣗ೈЎ12pFü100pFˈ঺ϔϾЎ15pFü450pFDŽ䆩䯂˖(1)ᑨ䞛⫼ા⾡ৃব⬉ᆍ?ЎҔМ?(2)ಲ䏃⬉ᛳL˙˛(3)Ў䆕䎇໳ⱘ

3、乥⥛ࠏᑺ㊒ᑺˈᅲ䰙ⱘᑊ㘨䇤ᤃಲ䏃ᑨབԩ䆒䅵?1㾷˖f=02πLCL15/450pFfC߭ৃব⬉ᆍⱘ䗝ᢽᑨ⒵䎇max≤maxCXCfCminmin3f160510×Cmaxmax==3=93f53510×CminminC100C450maxmax⬉ᆍ1˖=<9⬉ᆍ2˖==30>9C12C15minmin䗝ᢽ15pFü450pFⱘৃব⬉ᆍᰃᙄᔧⱘˈৠᯊ㗗㰥ࠄ乥⥛೼535kHzü1605kHz⊶↉ݙব࣪ˈ಴ℸ䗝ᢽϔ⬉ᆍCϢৃব⬉ᆍ15pFü450pFᑊ㘨ҹ⒵x䎇fC+CC−9Cmaxmaxxmaxmin==3C==39.37pFxfC+C91−minminx䗝C=40pFx1

4、11L===≈179µH2232−12ωC(2πf)(C+C)(2π×160510)(1540)10×+×0maxminx21L=2(2πf)(C+C)minmaxxlü3І㘨ಲ䏃བд೒1ü1᠔⼎ˈᇚ11ッⷁ䏃ˈC䇗ࠄ100PFᯊ䇤ᤃˈ⬉ᆍ1Cϸッⱘ⬉य़Ў10Vˈབ11ッІ᥹ܹ䰏ᡫZЭˈᏆⶹZ=r+ˈℸᯊCxxxjωCx䇗ࠄ200pFᯊ䞡ᮄ䇤ᤃˈCϸッ⬉य़ব៤2.5VDŽ∖⬉ᛳLˈಲ䏃ぎ䕑ક䋼಴᭄QঞZDŽ0x㾷˖1˅11ッⷁ䏃ᯊˈ䇤ᤃ11L===253µH262−12(2πf)C(2π×10)×10010×0V10cQ===1000V0.1s11r===15.9Ω6−12

5、QωC1002×π×10×10010×0012˅11ッІ᥹Z=r+ˈLˈfഛϡবxx0jωCxCC
xC==100pFC=200pFΣxCC+xC200C᥹ܹৢˈV=2.5Vˈ಴ℸV=
V=×2.5V=5VxCCΣCC100ΣV5cΣQ===50LV0.1s11r+r===31.8Ωr=15.9Ωx6−12xQωC502×π×10×10010×L031ü4བд೒1ü2᠔⼎ˈᏆⶹL=0.8µHˈQ=100ˈC1˙C2˙20pFˈ0C=1pFˈP=0.5ˈR=10kΩˈC=1pFˈR=5kΩDŽ䆩䅵ㅫಲ䏃䇤ᤃ乥⥛ǃ䇤iiLLᤃ⬉䰏Rǃ᳝䕑Qؐ੠䗮乥ᏺDŽPLC1
'IsLCC'

6、C'i2LR'iR'LC1㾷˖p==0.51C+C12'RL'2R==20kΩC=pC=0.25pFL2L1Lp1'RL'2'R==40kΩC=pC=0.25pFI=pI=0.5Ii2iLsssp'CC12'ᑊ㘨䇤ᤃಲ䏃ⱘᘏ⬉ᆍC=C++C=10.5pFΣiLC+C1211f===54.9MHz0'−6−122πLC2π0.810××10.510×ΣRP6−6Q=R=QωL=1002×π×54.910××0.810×=27.6kΩ0P00ωL0111111g=++=++=0.111msΣ''333RRR4010×27.610×2010×iPL411Q===32.64L−

7、36−6gωL0.11110××2π×54.910××0.810×Σ0f54.910×602∆f===1.68MHz0.707Q32.64L1ü5Ꮖⶹд೒1ü3Ёˈf=1MHzˈC=100pFˈR=50ΩˈQ=300ˈps0R=2kΩˈ㽕∖2∆f=10kHzᴵӊϟ䕧ܹऍ䜡DŽ䆩∖p੠pDŽL0.70712
'IsLg's1/RPg'LRRLs㾷˖R'=R'=L2s2pp2111L===253µH262−12(2πf)C(2π×10)×10010×pQ3000R===477.8kΩp6−12ωC2π×10×10010×0fpQ==100L2∆f