Uza kubona umahluko obalulekileyo phakathi kokuseta i-op-amp ye-inverting ne-non-inverting kwindlela odibanisa ngayo ii-input kunye nendlela ezisebenza ngayo iziphumo. Kukwakho umahluko kwisigaba semveliso, ifomyula yokufumana inzuzo, kunye ne-input impedance enikwa yi-setup nganye. Kuya kufuneka uyazi le mahluko iphambili ukuze wenze ukhetho olufanelekileyo loyilo. Le mahluko iya kutshintsha indlela esebenza ngayo isekethe yakho kunye nendlela oceba ngayo uyilo lwakho lwe-PCB. Olu thelekiso lwe-op-amp ye-inverting kunye ne-non-inverting lukunceda ukhethe eyona seti ilungileyo yeprojekthi yakho.
IItrakthi ezibalulekileyo
Ii-op-amps eziguqulayo zijika isignali yokufaka ijonge ezantsi, kodwa ii-op-amps ezingaguqukiyo ziyigcina ngendlela efanayo. Kufuneka usebenzise ii-op-amps eziguqulayo xa ufuna ukudibanisa iisignali. Ii-op-amps ezingaguqukiyo zingcono ekubhafeni naxa ufuna i-input impedance ephezulu. Ii-op-amps ezingaguqukiyo zihlala zenza ingxolo encinci, ngoko zisebenza kakuhle kwimisebenzi enobuzaza. Soloko ujonga iifomyula ze-gain. Ii-op-amps eziguqulayo zisebenzisa i-Gain = -R2/R1. Ii-op-amps ezingaguqukiyo zisebenzisa i-Gain = 1 + (R2/R1). Uyilo oluhle lwe-PCB lubaluleke kakhulu. Gcina umkhondo umfutshane kwaye ugcine iindawo ze-analog nezedijithali zahlukene ukuze kungabi nomsindo uphantsi.
Op-Amp Basics
Yintoni i-Op-Amp?
Uyabona i-op-amp eninzi kwi-elektroniki. I-op-amp sisixhobo esikhethekileyo sokukhulisa amandla. Senza imiqondiso ye-voltage ibe namandla ngakumbi. Uyisebenzisa kwiintlobo ngeentlobo zeesekethe. Ingenza imisebenzi eyahlukeneyo. I-op-amp ineephini ezimbini zokufaka. Ikwanayo nephini enye yokukhupha. Ufaka imiqondiso kwii-inputs. I-op-amp ikunika isignali yokukhupha enamandla ngakumbi.
Ingcinga ephambili kukuba i-op-amp isebenzisa impendulo. Impendulo ithetha ukuba imveliso ethile ibuyela kwi-input. Oku kugcina i-op-amp izinzile kwaye ichanekile. Uninzi lwexesha, usebenzisa impendulo engalunganga. Impendulo engalunganga iyayithintela imveliso ukuba ingabi nkulu kakhulu okanye ingabi nkulu. Kukho omnye umthetho obizwa ngokuba yi-virtual short. Oku kuthetha ukuba zombini ii-input pin zine-voltage efanayo. I-op-amp ayithathi umbane kumthombo wakho wesignali. Ngenxa yezi zinto, ungasebenzisa i-op-amp kwimisebenzi yezibalo. Ingongeza, isuse, idibanise, kwaye yahlukanise imiqondiso.
Iimpawu eziphambili
Xa ukhetha i-amplifier esebenzayo, jonga iimpawu eziphambiliEzi mpawu zigqiba indlela esebenza ngayo isekethe yakho. Nantsi itheyibhile enezona mpawu zibalulekileyo ze-op-amp:
uphawu | Ixabiso elifanelekileyo | Uluhlu lwexabiso lokwenyani | Impembelelo ekusebenzeni kwesekethe |
|---|---|---|---|
I-Open Loop Gain (Avo) | ∞ | 20,000 ukuya 200,000 | Yenza isignali yokufaka ibe nkulu. Ukwanda okungakumbi kunokunceda kodwa kunokubangela iingxaki. |
Impedance yokufaka (iZin) | ∞ | Iipicoamps ezimbalwa ukuya kwiimilliamps ezininzi | Ukufakwa okuphezulu kwe-impedance kuyayeka ukulayisha. Oku kunceda imiqondiso ukuba ihlale ichanekile. |
Impedance yesiphumo (iVout) | 0 | 100Ω ukuya kwi-20kΩ | Impedance ephumayo ephantsi ivumela amandla amaninzi ukuba aye kumthwalo. Oku kuthintela ukwehla kwe-voltage. |
Ububanzi (BW) | ∞ | Inqunyelwe yimveliso yeGain-Bandwidth | I-bandwidth ebanzi ivumela i-op-amp ukuba isebenze ngeefrikhwensi ezininzi. Oku kubalulekile kwiisignali ze-AC. |
I-Offset Voltage (iVin) | 0 | I-offset voltage ethile yemveliso | I-voltage encinci ye-offset ilungile ekuchanekeni. Inceda imveliso ihlale ichanekile. |
Icebiso: Soloko ujonga la maxabiso kwiphepha ledatha ngaphambi kokuba usebenzise i-op-amp. Ukukhetha i-amplifier yokusebenza efanelekileyo kunceda isekethe yakho isebenze kakuhle.
Ukuthelekiswa kwe-Inverting vs Non-Inverting Op-Amp
Igalelo kunye nemveliso
Xa u thelekisa i-inverting kunye ne-non-inverting Ii-op-amps, uyabona ukuba ziqhagamshela ngokwahlukileyo. Kwi-op-amp eguqukayo, isignali iya kwi-input engalunganga. I-input echanekileyo idla ngokuqhagamshela emhlabeni. Isiphumo siphuma sijijekile xa kuthelekiswa ne-input. Kwi-op-amp engajijekiyo, isignali iya kwi-input echanekileyo. I-input engalunganga iqhagamshela kwinethiwekhi yempendulo okanye i-voltage divider. Isiphumo sihambelana ne-input kwaye asijijeki.
Usebenzisa i-op-amp ejikajikayo xa ufuna ukubuyisa isignali. Usebenzisa i-op-amp engajikajikayo xa ufuna isiphumo sihlale sifana nesigaba sokufaka. Ukujonga indlela i-input kunye ne-output connect ngayo linyathelo lokuqala ekuthelekiseni ezi ntlobo zimbini.
Isigaba kunye neNzuzo
Isigaba sesiphumo sibaluleke kakhulu. Kwi-op-amp eguqukayo, isiphumo siphuma kwiidigri ezili-180 kwisigaba nge-input. Ukuba i-input iyanyuka, isiphumo siyahla. Kwi-op-amp engaguqukiyo, isiphumo sihlala kwisigaba nge-input. Xa i-input inyuka, isiphumo naso siyanyuka.
Ufanele uzazi iifomula zokufumana inzuzo zohlobo ngalunye. I-Gain ikuxelela ukuba i-op-amp yenza isignali yakho ibe nkulu kangakanani. Nantsi itheyibhile ebonisa iifomula zokufumana inzuzo kuzo zombini:
uqwalaselo | Ifomula yokufumana inzuzo |
|---|---|
Isandisi-lizwi sokuguqula | Inzuzo = -R2/R1 |
Isandisi-lizwi esingaguquliyo | Inzuzo = 1 + (R2/R1) |
I-op-amp ejikajikayo inika i-gain engalunganga. I-op-amp engajikajikayo inika i-gain eqinisekileyo ehlala injalo ubuncinane. Zombini zinokunika i-gain ephezulu, kodwa ukuseta i-resistor kutshintsha isiphumo.
Impedance kunye ne-CMRR
Impedance yenye into ebalulekileyo eyahlukileyo. Kwi-op-amp eguqukayo, i-input impedance ivela kwi-resistor kwi-input. Eli xabiso lidla ngokuba lingabi phezulu kakhulu. Kwi-op-amp engaguqukiyo, i-input impedance iphezulu kakhulu. Phantse ayinasiphelo kuba ixhomekeke kwi-op-amp ngokwayo. I-input impedance ephezulu ilungile kuba ayilayishi umthombo wesignali.
I-CMRR ithetha iCommon-Mode Rejection Ratio. Ibonisa indlela i-op-amp engayinaki ngayo imiqondiso efana kuzo zombini ii-input. Zombini ezi ntlobo zinokuba ne-CMRR ephezulu, kodwa i-op-amp engaguqukiyo idla ngokwenza ngcono kwiisekethe zokwenyani. Oku kukunceda ufumane imiqondiso ecocekileyo, ingakumbi xa ufuna i-gain ephezulu.
Umlandeli wengxolo kunye neVoltage
Ingxolo ingenza imiqondiso ibe mdaka. Ii-op-amps eziguqukayo zifumana ingxolo engaphezulu. Oku kwenzeka kuba umsinga wokufaka udlula kwii-resistor kwaye wongeza ingxolo eyongezelelweyo. Ii-op-amps ezingaguqukiyo zihlala zinengxolo encinci. Ukuseta impendulo kunceda ukugcina ingxolo iphantsi, ingakumbi xa i-gain iphantsi.
Nantsi itheyibhile ethelekisa ukusebenza kwengxolo:
uqwalaselo | Ukusebenza kwengxolo |
|---|---|
Ukungaguquli | Ngokwesiqhelo ingxolo iphantsi ngenxa yempendulo. |
Ukuguqula | Ifumana ingxolo engaphezulu evela kumbane ongenayo ngokusebenzisa ii-resistor. |
Ukuzuza kwengxolo | Ii-amplifiers ezingaguqukiyo zinokuba ne-ingxolo ephantsi xa ziphezulu kunee-amplifiers eziguquliweyo. |
I-op-amp engaguqukiyo ingasebenza njengomlandeli we-voltage. Oku kuthetha ukuba isiphumo sikopisha ngqo igalelo. Usebenzisa umlandeli we-voltage ukuqhagamshela iindawo ezahlukeneyo zesekethe ngaphandle kokulahlekelwa ngumgangatho wesignali. Nazi ezinye zezinto ezenziwa ngumlandeli we-voltage:
Igcina iindawo zesekethe zahlukile.
Igcina umgangatho wesiginali kwaye ihambelana nokungathinteli.
Ifumana i-voltage gain eyi-1, ngoko ke imveliso ihambelana negalelo.
Ikhusela umgangatho wesiginali phakathi kwezigaba zesekethe.
Impedance ephezulu yokufaka ithetha ukuba itsala umbane omncinci.
I-impedance ephumayo ephantsi ivumela ukuba iqhube kakuhle ezinye izigaba zesekethe.
I-op-amp eguqulayo ayinakuba ngumlandeli we-voltage. Yi-op-amp engaguqukiyo kuphela enokwenza lo msebenzi.
Izishwankathelo zeZicelo
Usebenzisa zombini ezi ntlobo kwiiprojekthi ezininzi. I-op-amp eguqulayo isebenza kakuhle ekuxubeni imiqondiso okanye ekwenzeni izihluzi ezisebenzayo. I-op-amp engaguqukiyo ingcono kwi-input impedance ephezulu okanye kwi-buffering yesignali. Nantsi itheyibhile ebonisa ukusetyenziswa okuqhelekileyo kohlobo ngalunye:
Uhlobo lwesicelo | inkcazelo |
|---|---|
Izikhulisi zomsindo | Yenza imiqondiso yesandi ibe phezulu ukuze isandi sibe ngcono kwizixhobo. |
Izihlanganisi ze-Amplifiers | Idibanisa iimpawu ezininzi zokufaka kwimveliso enye. |
Izihlungi ezisebenzayo | Ihluza amaza athile kwiisignali. |
Izixhobo zokwandisa izixhobo | Inika ukuchaneka okuphezulu kunye nozinzo lokulinganisa imiqondiso kwizixhobo. |
Uzibona ezi ntlobo ze-op-amp kuyo yonke indawo kwi-elektroniki. Ukhetha efanelekileyo ngokusekelwe koko kufunwa yisekethe yakho. Ukuba ufuna i-high gain, ungasebenzisa naluphi na uhlobo, kodwa kufuneka ujonge i-phase, i-impedance, kunye nengxolo. I-inverting op-amp ilungile ekuxubeni nasekuhluzeni. I-non-inverting op-amp ilungele ukubhafa kunye ne-input impedance ephezulu.
Itheyibhile eKhawulezayo yokuKhangela
Nantsi itheyibhile yesishwankathelo yokuthelekisa ii-op-amps ze-inverting kunye ne-non-inverting:
uphawu | Ukuguqula i-Op-Amp | I-Op-Amp engaguqukiyo |
|---|---|---|
Ungeniso loNgeniso | Igalelo elibi | Igalelo elihle |
Isigaba seziphumo | I-180° ingaphandle kwesigaba (iguqulwe) | Kwisigaba (esingaguqukiyo) |
Ifomula yokufumana inzuzo | Inzuzo = -R2/R1 | Inzuzo = 1 + (R2/R1) |
Ukungenisa Impedance | Isetiwe yi-input resistor | Iphezulu kakhulu (phantse ingabi nasiphelo) |
I-CMRR | phezulu | Iphezulu kwiimeko ezininzi |
noise | Kunokwenzeka ukuba ingxolo ivele | Ingxolo ephantsi |
Umlandeli weVoltage | Akwenzeki | nokwenzeka |
izicelo | Ukuxuba, ukucoca, ukushwankathela | I-buffering, i-Z ephezulu, isandi |
Ngoku uyayazi umahluko ophambili phakathi kwee-op-amps ezitshintshayo nezingezizo ezitshintshayo. Oku kukunceda ukhethe eyona ifanelekileyo kwiprojekthi yakho, nokuba ufuna i-gain ephezulu, ingxolo ephantsi, okanye iimpawu ezikhethekileyo zokufaka kunye nemveliso.
Isandisi-lizwi sokuguqula i-Op-Amp
Ingaba isebenza kanjani
Usebenzisa i-inverting amplifier xa ufuna ukujika isignali yakho. Isignali yokufaka idlula kwi-resistor iye kwi-negative input. I-positive input iqhagamshela emhlabeni. I-feedback resistor idibanisa i-output ne-negative input. Nantsi indlela isignali ehamba ngayo kule circuit:
Isignali yokufaka iya kwi-inverting input isebenzisa i-resistor.
Isithinteli sempendulo sidibanisa isiphumo kwi-inverting input. Oku kwenza i-negative feedback loop.
Umsinga kwi-terminal ye-inverting ulandela umthetho we-Ohm.
Lo msinga uphinda uhambe nge-resistor yempendulo ngenxa ye-virtual short.
I-voltage yemveliso isebenzisa le fomyula: Vout = -Vin × (Rf / Rin). Oku kubonisa i-gain kunye ne-phase flip.
Iimpawu zobugcisa
Kukho izinto ezibalulekileyo malunga nokuguqula ii-amplifiers:
I-gain isebenzisa ifomula ethi -Rf/Rin. Ungayibeka indlela isignali ekhula ngayo ngokukhetha amaxabiso e-resistor.
I-input kunye ne-output impedance zitshintsha indlela esebenza ngayo isekethe.
Ingxolo ingenza isignali yakho ingacaci kakuhle.
I-amplifier eguqulayo isebenzisa impendulo engalunganga. Oku kugcina imveliso izinzile kwaye ijikajika.
Ukuba i-bandwidth ye-op-amp incinci kakhulu, isekethe inokuba yinto engazinzile. Ungakulungisa oku ngembuyekezo yefrikhwensi.
Okuhle nokubi
Iingenelo ze-Inverting Operational Amplifier | Iingxaki ze-Inverting Operational Amplifier |
|---|---|
Uzinze ngakumbi kune-non-inverting | Ifumana ingxolo engaphezulu kune-non-inverting |
Inzuzo ephezulu inokwenzeka ngokukhetha ii-resistor | Ifuna uyilo oluntsonkothileyo ngakumbi |
Isebenza njengendawo ebonakalayo, yenza uyilo lube lula | Ibuthathaka kwi-offset voltage yokufaka |
Ingatshintsha isigaba sokuphuma | Imo eqhelekileyo ithintela uluhlu lokufaka |
Impedance ephezulu yokufaka kunye nempedance ephantsi yokukhupha | Ukujika kwesigaba kunokuba yingxaki kwezinye iisekethe |
izicelo
Uyabona ii-amplifiers eziguqulayo kwiindawo ezininziZisetyenziswa kwizixhobo zesandi, kwiinkqubo zolawulo, nakwizixhobo zonyango. I-amplifier eguqulayo ilungile ekuxubeni imiqondiso, ekwenzeni izihluzi, nasekudibaniseni imiqondiso kunye. Usebenzisa le sekethe xa ufuna ukulawula imiqondiso yesigaba okanye yokuxuba.
Iingcebiso zoYilo lwePCB
Xa wenza i-PCB ye-inverting amplifier, gcina ii-traces zimfutshane. Oku kunceda ukunciphisa ingxolo. Beka ii-resistor kufutshane nee-op-amp pins. Sebenzisa i-ground plane eqinileyo ukuze uzinze ngcono. Gcina iindlela zokufaka kunye nezokukhupha zahlukene ukuze umise impendulo engafunekiyo. Uyilo olucokisekileyo lukunika iziphumo ezilungileyo kwi-inverting amplifier yakho.
I-Op-Amp Non-Inverting Amplifier
Ingaba isebenza kanjani
Usebenzisa i isandisi-lizwi esingaguqukiyo xa ufuna isiphumo sihambelane nesigaba sokufaka. Isignali yokufaka iqhagamshela kwisiphelo sendlela esihle. Isiphelo sendlela esibi siqhagamshela kwisahluli sevolthi esenziwe ngeeresistor ezimbini. Le ndlela yempendulo ibeka i-gain. Isiphumo sikopisha i-input, ngoko ke akukho phase flip. Ii-amplifier ezingaguqukiyo zisetyenziswa xa ufuna ulwalathiso lwesignali ukuze luhlale lufana.
Iimpawu zobugcisa
Ungabona indlela ii-amplifiers ezitshintshayo nezingenazo i-inverting ezahluke ngayo kule theyibhile:
Isiseko soMahluko | Isandisi-lizwi sokuguqula | Isandisi-lizwi esingaguquliyo |
|---|---|---|
Umahluko wesigaba phakathi kwezibonakaliso zokufaka kunye neziphumo | I-180° ingaphandle kwesigaba | Kwisigaba (0°) |
Uqwalaselo lwetheminali yongeniso | Igalelo kwisiphelo esingalunganga | Igalelo kwisiphelo esihle |
Uqwalaselo lwempendulo | Impendulo kwisiphelo esinye njengoko kufakwe | Impendulo kwi-terminal eyahlukileyo |
Ukufumana imbonakalo | $$A_v = -frac{R_2}{R_1}$$ | $$A_v = 1 + frac{R_2}{R_1}$$ |
Ukufumana i-polarity | Udandathekile | Positive |
Ukufakwa kokungeniswa | Ilingana ne-R1 | Ephakamileyo kakhulu |
izicelo | Izikhulisi zokumelana ne-trans, iisekethe zokudibanisa | Izijikelezo ze-impedance eziphezulu zokufaka, abalandeli be-voltage |
Okuhle nokubi
Ii-amplifier ezingaguqukiyo zineendawo ezintle. Zikwanazo nezinye iingxaki. Nantsi itheyibhile ebonisa oku:
eziluncedo | neengozi |
|---|---|
Ukumelana okuphezulu kokufaka | Kunzima kancinci ukuyila ngenxa yokuseta impendulo |
Igcina isigaba sokuqala sesiginali | |
Ilungele imiqondiso ebuthathaka kunye nee-buffers |
izicelo
Ii-op-amps ezingaguqukiyo zisetyenziswa kwi iisekethe zesensor kunye nee-audio buffersZikwasetyenziswa njengabalandeli be-voltage. Ezi sekethe zifuna i-input impedance ephezulu kwaye akukho tshintsho lwesigaba. Ufumana ii-amplifier ezingaguqukiyo kwizixhobo zokulinganisa kunye neenkqubo zokulungisa isignali. Zinceda ekukhuseleni imiqondiso ebuthathaka kwaye ziqhagamshela izigaba ezahlukeneyo zesekethe.
Iingcebiso zoYilo lwePCB
Icebiso: Uyilo oluhle lwe-PCB lunceda i-amplifier yakho engaguqukiyo isebenze kakuhle kwaye ihlale izinzile.
Beka i-capacitor ye-bypass kufutshane ne-op-amp supply pin ukuze wehlise ingxolo.
Jonga i-open loop gain phakathi kwee-output kunye nee-input pin, kuba ithintela i-gain yakho.
Sebenzisa iindlela zokususa ubushushu kwiindlela zoyilo ze-amplifier ezinamandla aphezulu.
Gcina iindawo ze-analog nezedijithali zahlukene ukuze uthintele ingxolo evela kwiisekethe zedijithali.
Ukukhetha Uqwalaselo lwe-Op-Amp oluLungileyo
Imiba yoYilo
Kuya kufuneka ucinge ngezinto ezimbalwa ngaphambi kokuba ukhethe useto lwe-op-amp. I-input impedance kunye ne-gain zibaluleke kakhulu. Useto lwe-inverting lunika i-gain usebenzisa i-feedback kunye ne-input resistors. Useto lwe-non-inverting lunika i-gain engaphezulu kuba ifomula yongeza enye. Oku kunokubangela iingxaki ukuba awujongi amaxabiso akho e-resistor. Kufuneka uqinisekise ukuba i-gain ihambelana nento oyifunayo. Ingxolo kunye ne-phase nazo zibalulekile. I-inverting op-amp ijika i-signal phase. I-non-inverting op-amp igcina i-phase ifana. Cinga ngendlela iseto ngasinye esitshintsha ngayo isignali yakho kunye nozinzo. Ukukhetha okulungileyo kunceda i-op-amp yakho isebenze kakuhle.
Icebiso: Soloko ujonga i-input impedance. I-op-amp engaguqukiyo ine-input impedance ephezulu kakhulu. Oku kunceda ukugcina imiqondiso ebuthathaka ikhuselekile.
Izigqibo zeSicelo
Iisetingi ezahlukeneyo ze-op-amp zisebenza kakuhle kwimisebenzi eyahlukeneyo. Itheyibhile engezantsi ibonisa ukuba loluphi useto olufanelekileyo kusetyenziso ngalunye:
Uqwalaselo lwe-Op-Amp | Ezona mpawu | izicelo |
|---|---|---|
Isandisi-sandiso esahlukileyo | Yenza umahluko we-voltage ube mkhulu, ivala ingxolo | Ukulinganiswa kwezixhobo, izixhobo, iisekethe ze-analog ezichanekileyo kakhulu |
Umlandeli weVoltage | Impedance ephezulu yokufaka, i-impedance ephantsi yokukhupha | Ukudibanisa izivamvo, iinkqubo zokufumana idatha, ukwahlulwa kwesigaba |
Khetha i-op-amp eguqulayo xa ufuna ukuxuba iisignali okanye ukwenza izihluzi. Sebenzisa i-op-amp engaguqukiyo ukuze ubambe kwaye ugcine iisignali zikhuselekile. Xhathisa useto neprojekthi yakho ukuze ufumane iziphumo ezilungileyo.
PCB Impact
Ukhetho lwakho lwe-op-amp lutshintsha indlela ocinga ngayo yila i-PCB yakho. Useto lwe-inverting lufuna uyilo olucokisekileyo ukuze ingxolo ihlale iphantsi. Beka ii-resistor kufutshane nee-op-amp pins. Gcina ii-traces zimfutshane. Useto lwe-non-inverting lukuvumela ukuba usebenzise ii-traces ezinde kuba lune-input impedance ephezulu. Gcina iindawo ze-analog nezedijithali zahlukene ukuze uyeke ukuphazamiseka. Uyilo oluhle lwe-PCB lunceda i-op-amp yakho isebenze kakuhle kwaye lwenza kube lula ukwakha. Soloko ucwangcisa uyilo lwakho ngokusekelwe kuseto lwe-op-amp olukhethileyo.
Izixhobo zoYilo kunye neMikhwa eBalaseleyo
PCB Design Tools
Udinga izixhobo ezilungileyo zokwakha isekethe ye-op-amp eqinileyo. I-Altium Designer ineempawu ezininzi eziluncedo. Isebenza kakuhle kwiiprojekthi ezinkulu ze-PCB ezinamaleya amaninzi. I-Cadence Allegro inceda ngoyilo olukhawulezayo nolwe-RF. Ijonga ukuba imiqondiso yakho ilungile na. I-LTspice ikuvumela ukuba uvavanye isekethe yakho ye-op-amp ngaphambi kokuba uyakhe. Ezi zixhobo zikunceda ufumane iingxaki kwangethuba kwaye ulungise uyilo lwakho. Ukusebenzisa isoftware ye-pro PCB konga ixesha kwaye kukunceda uphephe iimpazamo.
Ukulungiswa kweSekethe
Ungenza isekethe yakho ye-op-amp ibe ngcono ngokulandela amanyathelo alula:
Beka imiqondiso yewotshi kwezinye iileya ngaphandle kwemiqondiso ye-analog. Oku kugcina ingxolo kude ne-op-amp yakho.
Sebenzisa i-star grounding ukuze uthintele ingxolo yedijithali ukuba ingafikeleli kwiindawo ze-analog.
Zama i-differential signaling ukuze ufake i-analog ukuze uvale ingxolo.
Khetha iindawo ezifanelekileyo. Ii-SMD zinceda ekunciphiseni i-inductance eyongezelelweyo kunye ne-capacitance.
Sebenzisa uyilo lwe-microstrip okanye i-stripline ukugcina imiqondiso icocekile.
Yongeza izinki zobushushu okanye iindlela zobushushu ukuba uyilo lwakho lushushu.
Qinisekisa ukuba uyilo lwakho luzinzile. Jonga iindlela zokufaka kunye neziphumo ukuze ubone ukuba kukho ukushukuma.
Amandla endlela alandeleka kakuhle ukuze i-op-amp yakho ifumane i-voltage ecocekileyo.
Gcina iindawo ze-analog nezedijithali zahlukene ukuze kuncitshiswe ukuphazamiseka.
Sebenzisa iplani yomhlaba eqinileyo ukuze ufumane indlela ekhuselekileyo yemijelo yokubuyela.
Icebiso: Ukukhetha ngononophelo uyilo kunceda isekethe yakho ye-op-amp ihlale ithule kwaye isebenza kakuhle.
Intsebenziswano yeNdibano
Ufumana iziphumo ezilungileyo xa usebenza neqela lakho le-PCB assembly. Ukuthetha kakuhle ngexesha loyilo nokudibanisa kukunceda uphephe iimpazamo. Ukuba wabelana ngeefayile zakho zoyilo kwangethuba, iqela le-assembly linokujonga iingxaki ezifana nokungalingani kweenyawo. Olu sebenziswano lunokuthintela imiba yokutywina kunye nokulibaziseka ngaphambi kokuba zenzeke. Xa uthetha nabenzi kunye nabadibanisi, uqinisekisa ukuba uyilo lwakho luyahlangabezana neemfuno zokhuseleko kunye nomgangatho. Ukusebenzisana kukunceda wakhe isekethe ye-op-amp ethembekileyo ehambelana neenjongo zakho.
Ufundile umahluko ophambili phakathi kwe-op-amps ezitshintshayo nezingezizo ezitshintshayo. Itheyibhile engezantsi ibonisa indlela uhlobo ngalunye olutshintsha ngayo isigaba, igalelo, kunye nento ezisetyenziselwa yona:
uphawu | Ukuguqula i-Op-Amp | I-Op-Amp engaguqukiyo |
|---|---|---|
Isigaba seShift | Utshintsho lwesigaba se-180-degree | Utshintsho lwesigaba se-0-degree |
Uqwalaselo lokufaka | Isignali yokungena kwe-inverting | Isignali yokungena okungaguqukiyo |
Ukungenisa Impedance | Impedance yokufaka esezantsi | I-impedance ephezulu yegalelo |
izicelo | Ukuguqula, ukufingqa ii-amplifiers | Abalandeli beVoltage, ii-buffers |
Cinga ngento ofuna ukuba isekethe yakho yenze. Ngaba kufuneka wenze imiqondiso ibe mikhulu, uyitshintshe, okanye uyigcine ifana? Fumana ukuba ufuna inzuzo engakanani. Jonga ukuba isekethe yakho ifuna ntoni ngaphambi kokuba ukhethe useto. Sebenzisa izixhobo ezilungileyo zoyilo lwePCB. Landela amanyathelo alumkileyo okufumana iziphumo ezilungileyo.
FAQ
Yintoni umahluko omkhulu phakathi kwee-op-amps ezitshintshayo nezingezizo ezitshintshayo?
Kwi-inverting op-amps, ubeka isignali yokufaka kwi-negative terminal. Kwi-non-inverting op-amps, usebenzisa i-positive terminal kwi-input signal. Uhlobo lwe-inverting lwenza i-output phase ijike. Uhlobo lwe-non-inverting lugcina i-output phase ifana ne-input.
Ufanele usebenzise nini umlandeli we-voltage?
Sebenzisa umlandeli we-voltage xa ufuna ukubopha isignali. Olu seto lunika i-input impedance ephezulu kunye ne-output impedance ephantsi. Lunceda ekukhuseleni imiqondiso ebuthathaka. Lukwadibanisa izigaba ezahlukeneyo zesekethe ngaphandle kokulahlekelwa ngamandla esignali.
Loluphi ulungiselelo olungcono kwizicelo ezingenangxolo iphantsi?
Ii-op-amps ezingaguqukiyo zikunika ingxolo ephantsi. Inethiwekhi yempendulo kolu seto inceda ukugcina ingxolo iphantsi. Kwimiqondiso ebuthathaka, khetha ubumbeko olungaguqukiyo.
Icebiso: Yenza ii-PCB traces zakho zibe mfutshane. Oku kunceda ekunciphiseni ingxolo nangakumbi.
Ubala njani inzuzo yoqwalaselo ngalunye?
Nantsi itheyibhile ekhawulezayo yesalathiso:
uqwalaselo | Ifomula yokufumana inzuzo |
|---|---|
Ukuguqula i-Op-Amp | Inzuzo = -R2 / R1 |
I-Op-Amp engaguqukiyo | Inzuzo = 1 + (R2 / R1) |
Ukhetha amaxabiso okuchasana ukuze usete inzuzo.
