LMV324IDR Isiqwenga esitsha soqobo SOP14 Chip 4 umjelo ophantsi wamandla ombane okhupha iamplifier esebenzayo edityanisiweyo amacandelo e-IC

Ngokweeparamitha ze-amplifiers ezidibeneyo zokusebenza, zinokuhlulwa zibe ngamacandelo alandelayo.
I-1, injongo-jikelele: i-amplifier yokusebenza yenjongo jikelele yenzelwe iinjongo eziqhelekileyo.Into ephambili yolu hlobo lwesixhobo lixabiso eliphantsi, inani elikhulu leemveliso, kunye nezalathi zayo zokusebenza zinokufaneleka ukusetyenziswa ngokubanzi.Umzekelo μA741 (i-op-amp enye), i-LM358 (i-op-amp ephindwe kabini), i-LM324 (ii-op-amps ezine), kunye netyhubhu ye-field-effect njengenqanaba lokufaka i-LF356 zinjalo.Kungokunje zezona zisetyenziswa kakhulu iamplifiers ezidityanisiweyo zokusebenza.

I-2, Uhlobo oluPhezulu lokuchasa
Olu hlobo lweamplifier yokusebenza ehlanganisiweyo luphawulwa nge-impedance yemowudi yolwahlulo ephezulu kakhulu kunye nengeniso encinci kakhulu ye-bias yangoku, ngokubanzi i-rid>1GΩ~1TΩ, kunye ne-IB yeepicoamps ezimbalwa ukuya kumashumi e-picoamps.Owona mlinganiselo ungundoqo wokuphumeza ezi thagethi kukusebenzisa iimpawu zothintelo oluphezulu lwegalelo kwii-FET ukwenza inqanaba lokwahluka kwegalelo le-op-amp.Nge-FET njengenqanaba lokufaka, ingeyiyo kuphela i-impedance ephezulu, igalelo elisezantsi elithatha icala langoku, kunye nezibonelelo zesantya esiphezulu, ibroadband, kunye nengxolo ephantsi, kodwa igalelo lokususa amandla ombane likhulu.Izixhobo eziqhelekileyo ezidibeneyo zi-LF355, LF347 (ii-op-amps ezine), kunye ne-impedance ephezulu yegalelo CA3130, CA3140, njl. [2]

I-3, uhlobo lwe-drift yobushushu obuphantsi
Kwizixhobo ezichanekileyo, ukufumanisa umqondiso obuthathaka, kunye nezinye izixhobo zokulawula okuzenzekelayo, kuhlala kunqweneleka ukuba i-op-amp's detuning voltage kufuneka ibe yincinci kwaye ingatshintshi kunye nobushushu.Amaqondo obushushu aphantsi akhukulisekayo iiamplifiers zenzelwe le njongo.I-OP07, OP27, AD508, kunye ne-ICL7650, i-chopper-stabilized low-drift device ebandakanya i-MOSFETs, zezinye ze-amplifiers ezichanekileyo eziphezulu, ezisezantsi zobushushu ezisetyenziswayo namhlanje.

I-4, uhlobo lwesantya esiphezulu
Kwi-A/D ekhawulezayo kunye ne-D/A converters kunye nee-amplifiers zevidiyo, izinga lokuguqulwa kwe-SR ye-op-amp edibeneyo kufuneka ibe phezulu kwaye i-bandwidth yokuzuza ubunye i-BWG kufuneka ibe nkulu ngokwaneleyo njengenjongo jikelele-injongo edibeneyo ye-op-amps ayifanelekanga. izicelo ezinesantya esiphezulu.I-high-speed op-amps ibonakaliswe ikakhulu ngamazinga aphezulu okuguqulwa kunye nokuphendula okubanzi.Ii-op-amps eziqhelekileyo zi-LM318, μA715, njl., SR=50~70V/us, BWG>20MHz.

5,Uhlobo lokusetyenziswa kwamandla aphantsi.
Njengoncedo olukhulu lwesekethe ye-elektroniki, ukudityaniswa kukwenza iisekethe ezintsonkothileyo zibe zincinci kwaye zikhaphukhaphu, ngoko ke ngokwandiswa koluhlu lwezicelo zezixhobo eziphathwayo, kuyimfuneko ukusebenzisa unikezelo lwamandla ombane ophantsi, ukusetyenziswa kwamandla aphantsi kwesigaba seamplifier esisebenzayo.I-amplifiers esetyenziswa ngokuqhelekileyo yi-TL-022C, TL-060C, njl., i-voltage yayo yokusebenza i-± 2V ~ ± 18V, kwaye ukusetyenziswa kwangoku yi-50 ~ 250μA.Ezinye iimveliso zifikelele kwinqanaba le-μW, umzekelo, ukunikezelwa kwamandla e-ICL7600 yi-1.5V, kwaye ukusetyenziswa kwamandla yi-10mW, enokuthi inikwe ibhetri enye.

I-6, amandla ombane aphezulu kunye neentlobo zamandla aphezulu
I-voltage ephumayo yee-amplifiers zokusebenza inqunyelwe ikakhulu kunikezelo lwamandla.Kwii-amplifiers eziqhelekileyo zokusebenza, umbane ophezulu wokukhupha amandla udla ngokuba ngamashumi ambalwa e-volts kwaye imveliso yangoku ngamashumi ambalwa e-milliamp.Ukwandisa i-voltage ye-output okanye ukwandisa i-output current, i-op-amp edibeneyo kufuneka idityaniswe ngaphandle yisekethe encedisayo.I-voltage ephezulu kunye nephezulu yangoku edibeneyo ye-op amps inokukhupha amandla ombane aphezulu kunye nokuphezulu kwangoku ngaphandle kokujikeleza okongeziweyo.Umzekelo, i-D41 edibeneyo ye-op-amp inokubonelela ngee-voltages ukuya kuthi ga kwi-±150V kunye ne-μA791 edibeneyo ye-op-amp inokuhambisa imisinga yemveliso ukuya kuthi ga kwi-1A.

7,Uhlobo lolawulo olucwangcisekileyo
Kwinkqubo ye-instrumentation, kukho ingxaki yoluhlu.Ukuze ufumane i-voltage esisigxina, kuyimfuneko ukutshintsha ukukhulisa i-amplifier yokusebenza.Umzekelo, i-amplifier yokusebenza inokwandisa amaxesha ali-10, xa isignali yokufaka i-1mv, i-voltage ephumayo yi-10mv, xa i-voltage yegalelo iyi-0.1mv, imveliso yi-1mv kuphela, ukuze ufumane i-10mv, ukwandiswa kufuneka kube. itshintshelwe kwi-100. Umzekelo, i-PGA103A, ngokulawula inqanaba le-pin 1,2 ukutshintsha ukukhulisa.