Lub hauv paus ntsiab lus ntawm LC series resonant circuit yog dab tsi? Wuhan UHV tshwj xeeb hauv kev tsim khoomseries ntawm resonance,nrog rau ntau yam khoom xaiv thiab 15 xyoo ntawm kev kuaj hluav taws xob kev paub. Thaum nrhiav series resonance, xaiv Huatian Fais Fab.
1. LC series resonant absorption circuit
Lub luag haujlwm ntawm kev nqus Circuit Court yog tshem tawm cov teeb liab ntawm qee zaus ntawm lub teeb liab tawm tswv yim. Kev nqus hluav taws xob pom hauv daim duab 1 yog tsim los ntawm LC series resonant circuit. VT1 nyob rau hauv Circuit Court yog thawj theem amplifier, qhov twg U yog lub teeb liab input thiab U yog lub teeb liab tso zis ntawm lub amplifier. Ll thiab Cl tsim ib qho LC series resonant absorption circuit nrog lub resonant zaus ntawm fo, uas yog kev cob cog rua ntawm lub input davhlau ya nyob twg ntawm VT1 thiab hauv av davhlau ya nyob twg.
Daim duab 1
(1) Lub teeb liab input zaus yog fo. Rau cov teeb liab nrog zaus fo nyob rau hauv lub teeb liab input, vim tib lub resonant zaus li Ll thiab Cl, series Circuit Court ntawm Ll thiab Cl muaj ib tug me me impedance rau nws. Lub teeb liab tawm tswv yim nrog zaus tsib yog hla mus rau hauv av los ntawm Ll thiab Cl thiab tsis tuaj yeem ntxiv rau lub hauv paus ntawm VT1. VT1 tsis tuaj yeem nthuav tawm lub teeb liab, thiab tau kawg, tsis muaj teeb liab nrog zaus fo hauv cov teeb liab tso tawm.
(2) Lub teeb liab input zaus siab dua los yog qis dua lub pob zeb. Rau cov teeb liab nrog cov zaus siab dua lossis qis dua fo hauv cov teeb liab tawm tswv yim, vim qhov tsis sib xws ntawm resonance frequencies nrog Ll thiab Cl, series Circuit Court ntawm Ll thiab Cl yuav detuned, uas ua rau muaj impedance siab. Lub teeb liab tawm tswv yim tsis yog hla mus rau hauv av los ntawm Ll thiab Cl, tab sis yog ntxiv rau lub hauv paus ntawm VT1, amplified los ntawm VT1, thiab tso zis.
Los ntawm cov yam ntxwv teb zaus ntawm qhov amplifier no, nws tuaj yeem pom tias tsis muaj teeb liab nrog zaus fo tam sim no hauv cov teeb liab tso zis.
2. Series resonant siab -frequency boost circuit
Daim duab 2 qhia qhov siab - zaus boost circuits uas muaj LC series circuits. VT1 nyob rau hauv Circuit Court tsim thawj theem ib qho emitter amplifier, thaum Ll thiab C4 tsim ib qho LC series resonant circuit los txhim kho siab -frequency signals. Lub resonant zaus ntawm series resonant Circuit Court ntawm Ll thiab C4 yog tsib, uas yog siab tshaj qhov ntau zaus ntawm kev khiav hauj lwm teeb liab ntawm no amplifier.
Daim duab 2
Vim qhov tsawg kawg nkaus impedance ntawm Ll thiab C4 circuits thaum lub sij hawm resonance, qhov kev tawm tswv yim tsis zoo raug txo kom tsawg thaum txuas nrog cov emitter tsis zoo tawm tswv yim resistor R4, uas ua rau lub siab tshaj plaws amplification yam nyob rau lub sij hawm no. Nyob rau hauv txoj kev no, lub siab - zaus teeb liab ze rau fo yog txhim kho, raws li qhia nyob rau hauv zaus teb tus yam ntxwv nkhaus ntawm lub amplifier nyob rau hauv daim duab. Lub siab -ntau zaus teb nkhaus tsis muaj Ll thiab C4 yog ib txoj kab dashed, thaum cov lus teb nkhaus nrog Ll thiab C4 yog ib txoj kab ruaj khov. Obviously, qhov siab - zaus teb ntawm cov kab khoom yog zoo dua li ntawm cov kab dashed.
Rau cov kev tawm tswv yim nrog cov zaus qis dua li fo, Ll thiab C4 circuits tsis muaj kev txhawb zog rau lawv. Vim hais tias Ll thiab C4 circuits nyob rau hauv lub xeev detuned, lawv impedance siab, thiab cov lus tawm tswv yim tsis zoo nyob rau lub sij hawm no yog R4.
3. Cov ntsiab lus ntawm Kev Tshawb Fawb Kev Ua Haujlwm ntawm LC Resonant Circuit
(1) Tus yam ntxwv ntawm impedance. Kev nkag siab qee yam ntawm cov yam ntxwv tseem ceeb ntawm ob lub resonant circuits yog lub hauv paus rau kev tshuaj xyuas lawv cov ntawv thov circuits, ntawm qhov tseem ceeb tshaj plaws yog cov yam ntxwv impedance ntawm ob lub resonant circuits, vim hais tias nyob rau hauv kev tsom xam ntawm cov kev ua hauj lwm ntawm ntau yam circuits, kev tsom xam ntawm lub Circuit Court feem ntau yog raws li impedance ntawm Circuit Court. Thaum lub LC parallel resonant circuit resonates, lub impedance yog siab tshaj, thaum lub LC series resonant Circuit Court yog qis tshaj. Nws yog ib qho yooj yim rau nco ntsoov hais lawv.
(2) LC series resonant circuit muaj qhov tsawg kawg nkaus impedance thaum lub sij hawm resonance. Cov kev ceev faj yuav tsum tau ua thaum soj ntsuam LC series resonant circuits yog tib yam li cov rau parallel resonant circuits, tshwj tsis yog tias cov impedance ntawm Circuit Court raug txo qis thaum lub sij hawm resonance series thiab maximized thaum uas tig mus resonance. Rau LC series resonant circuits, thaum lub Circuit Court yog detuned, lub impedance ntawm Circuit Court yog loj. Nyob rau lub sijhawm no, rau cov teeb liab nrog zaus qis dua qhov resonant zaus, lub ntsiab yog vim li cas lub capacitance impedance ntawm capacitor Cl yog loj. Rau cov teeb liab nrog zaus siab dua qhov zaus resonant, lub ntsiab yog vim li cas inductance impedance ntawm inductor Ll yog loj.
(3) Thaum LC parallel resonant circuit poob resonance, qhov impedance me me. Rau LC parallel resonant circuits, thaum lub Circuit Court yog detuned, lub impedance ntawm Circuit Court yog heev me me. Nyob rau lub sijhawm no, cov teeb liab nrog cov zaus qis dua qhov resonant zaus feem ntau dhau los ntawm inductor Ll ceg, thaum cov teeb liab nrog cov zaus siab dua qhov zaus resonant feem ntau dhau los ntawm lub capacitor Cl ceg.
(4) Lub teeb liab input zaus muab faib ua ob qhov xwm txheej. Thaum soj ntsuam daim ntawv thov circuits ntawm ob lub LC resonant circuits, qhov input signal zaus yuav tsum tau muab faib ua ob qhov xwm txheej: kev ua haujlwm hauv Circuit Court thaum lub input signal zaus sib npaug rau qhov resonant zaus thiab Circuit Court ua haujlwm thaum lub teeb liab input zaus tsis sib npaug rau qhov zaus resonant.
(5) Damping resistor nyhuv. Lub hom phiaj ntawm kev ntxiv damping resistors nyob rau hauv parallel resonant circuits yog kom tau txais cov bandwidth xav tau. Qhov me me ntawm qhov tsis kam ntawm qhov ntxiv resistor, qhov dav ntawm cov zaus band, thiab vice versa.
Qhov zaus ntawm cov teeb liab tawm tswv yim rau LC parallel resonant Circuit Court yog qhov dav heev, nrog rau cov teeb liab nrog cov zaus sib npaug rau cov zaus resonant. Ntawm ntau cov tswv yim tawm tswv yim ntawm ntau zaus, Circuit Court tsuas yog resonates nrog cov teeb liab ntawm lub resonant zaus, thaum lub sij hawm lub impedance ntawm Circuit Court yog nyob rau hauv siab tshaj plaws. Ib tug resonant circuit muaj ib tug bandwidth. Hauv kev txheeb xyuas Circuit Court, nws tuaj yeem txiav txim siab tias cov teeb liab nyob rau hauv lub zaus band yog amplified los yog ua tiav tib yam li cov teeb liab ntawm lub resonant zaus; Tab sis rau cov teeb liab nrog frequencies deviating los ntawm resonant zaus, nws yog ib qho tseem ceeb kom nkag siab. Qhov dav ntawm cov zaus band muaj feem xyuam nrog qhov loj ntawm Q tus nqi. Yog tias tus nqi Q yog qhov loj, nws tau txiav txim siab tias nws tsis tau nthuav dav lossis ua tiav, uas yog vim li cas kev ntsuas hluav taws xob yuav tsum tau nqaim ntau zaus; Me Q tus nqi thiab dav zaus band.