Cov txheej txheem:

Kev Taw Qhia rau Kev Ua Haujlwm Amplifiers: 7 Kauj Ruam
Kev Taw Qhia rau Kev Ua Haujlwm Amplifiers: 7 Kauj Ruam

Video: Kev Taw Qhia rau Kev Ua Haujlwm Amplifiers: 7 Kauj Ruam

Video: Kev Taw Qhia rau Kev Ua Haujlwm Amplifiers: 7 Kauj Ruam
Video: 6 Nqi Lus Qhia Kev Ua neej ( leej twg mloog lub neej yuav zoo tuaj) 2024, Kaum ib hlis
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Taw qhia rau Kev Ua Haujlwm Amplifiers
Taw qhia rau Kev Ua Haujlwm Amplifiers
Taw qhia rau Kev Ua Haujlwm Amplifiers
Taw qhia rau Kev Ua Haujlwm Amplifiers
Taw qhia rau Kev Ua Haujlwm Amplifiers
Taw qhia rau Kev Ua Haujlwm Amplifiers

Hauv Cov Lus Qhia no, Kuv yuav qhia txog Kev Ua Haujlwm Amplifier, yog ib qho muaj txiaj ntsig tshaj plaws ntawm cov khoom siv sib piv. Cov cuab yeej no tuaj yeem teeb tsa ua qhov tsis hloov pauv lossis hloov pauv lub zog, sib piv, ntsuas qhov ntsuas hluav taws xob, suav lub tshuab ua kom nrov, ntsuas qhov ntsuas qhov ntsuas, tsis muaj, lim lub zog, Wien choj oscillator ntxiv rau ntau lwm daim ntawv thov. Lub opamp los hauv kev teeb tsa sib txawv xws li ib LM741 8 tus pin DIP lossis LM324 14 tus pin quad op amp qhia saum toj no. Kuj tseem muaj hom uas tuaj rau hauv qhov sib txawv saum npoo av.

Kauj Ruam 1: Lub Amplifier Ua Haujlwm Li Cas?

Dab Tsi Yog Qhov Ua Haujlwm Amplifier?
Dab Tsi Yog Qhov Ua Haujlwm Amplifier?

Lub tshuab ua haujlwm ua haujlwm uas tseem paub luv luv li op-amp, yog DC txuas ua ke kom tau txais lub zog hluav taws xob ntau ntxiv, suav nrog hauv IC nti. Lawv muaj ob lub tswv yim (cov tswv yim sib txawv) thiab ib qho tawm. Lawv tau siv los ua cov khoom sib txuas hauv cov khoom siv hluav taws xob sib piv txij li thawj cov cuab yeej tawm los thaum xyoo 1960's. Ib qho ntawm qhov zoo nkauj ntawm cov cuab yeej no yog tias lawv yooj yim heev tsim hluav taws xob los ntawm qhov xwm txheej ntawm lawv cov txheej txheem. Tsim cov tshuab hluav taws xob nrog cov khoom siv sib cais koom nrog ntau qhov tweaking vim qhov sib txawv ntawm cov khoom siv nquag. Yog tias lub tshuab hluav taws xob tau tsim los ntawm tib lub silicon tuag, lawv txhua tus tuaj yeem ua tau zoo ib yam thiab muaj cov yam ntxwv zoo ib yam. Thaum tsim qauv nrog kev ua haujlwm ua haujlwm siab, qhov tau txais tshwj xeeb rau lub cuab yeej tuaj yeem tau los ntawm kev teeb tsa ob sab sab sab sab nraud nrog qhov tshwj xeeb tiv taus. Piv txwv, yog qhov xav tau qhov ntsuas hluav taws xob ntawm 100, 100k resistor thiab 1k resistor tuaj yeem muab tso rau hauv Circuit Court kom tau txais qhov sib piv ntawm 100. Siv lub tswv yim no, qhov nce yog tib yam txhua lub sijhawm. Qhov nrov tshaj plaws op-amp txhua lub sijhawm yog 741 uas tau nyob ib puag ncig txij li thaum ntxov 70's thiab tau siv los ntawm ntau tiam ntawm cov neeg nyiam ua haujlwm hauv txhua yam los ntawm cov suab nrov mus rau cov khoom siv hluav taws xob. 741 tsis tau siv los ntawm kev lag luam tau ntau xyoo vim tias op-amps tau zoo dua tau tsim, tab sis lawv tseem muaj cov hauv qab no ntawm cov nyiam ua haujlwm thiab yooj yim kom tau txais. Thawj cov cuab yeej tawm los nyob rau hauv ib qho 8 tus pin dual inline pob style lossis cov hlau tuaj yeem ua tau. Tom qab ntawd, cov khoom siv saum npoo tau dhau los. 741 thiab lwm yam op-amps ntawm nws cov vintage siv bipolar transistors nrog cov cuab yeej siv cov txiaj ntsig cuam tshuam transistor cov tswv yim tawm tom qab. Field effect transistor inputs tau pib siv vim tias xav tau kom muaj kev cuam tshuam ntau dua cov tswv yim thiab txo qis tam sim no.

Kauj Ruam 2: Tus Tsis-Hloov Hloov Amplifier

Tsis-Hloov Hloov Amplifier
Tsis-Hloov Hloov Amplifier
Tsis-Hloov Hloov Amplifier
Tsis-Hloov Hloov Amplifier
Tsis-Hloov Hloov Amplifier
Tsis-Hloov Hloov Amplifier

Lub tshuab hluav taws xob uas tsis hloov pauv yog thawj Circuit Court peb yuav npog. Hauv daim duab saum toj no, op amp tau txuas nrog cov tswv yim mus rau qhov kev nkag siab zoo nrog cov lus tawm tsam tiv thaiv mus rau qhov tsis zoo. Qhov piv ntawm Rf rau Rg txiav txim siab qhov nce. Hauv qhov xwm txheej saum toj no, qhov nce ntawm qhov hluav taws xob yog 10. Daim duab hauv nruab nrab qhov "ntiaj teb tiag" cov kev txwv ntawm 741 op amp thaum 10 kHz square yoj tau pub rau hauv cov tswv yim tab sis tawm los ua daim duab peb sab vim txwv kev hloov pauv ceev ntawm lub cuab yeej. Thaum cov tswv yim qis dua rau 1 kHz square yoj qhov tso tawm tau txhim kho thiab zoo li zoo li lub voos xwmfab tiag tiag. Kev ntsuas ntawm op amp lub peev xwm los ua raws cov lus qhia hloov pauv hauv qhov dav tau hu ua "Slew Rate" thiab ntsuas hauv volts-per-microsecond. 741 muaj qhov ntsuas zoo heev ntawm.5 volts-per-microsecond. Kev kub ceev op amps muaj kev ntsuas siab li 5000 volts-per-microsecond txawm hais tias qhov raug ib yam li TL081 yuav muaj qhov ntsuas nruab nrab ntawm 13 volts-per-microsecond.

Kauj Ruam 3: Lub Inverting Amplifier

Lub Inverting Amplifier
Lub Inverting Amplifier

Lub opamp tuaj yeem teeb tsa nyob rau hauv txoj hauv kev xws li 1-volt tsis zoo mus rau qhov hloov pauv tau tuaj yeem hloov pauv thiab ua kom nrov ntxiv kom muab 10-volt qhov zoo mus rau qhov ua haujlwm. Kev siv rau kev teeb tsa no tuaj yeem yog nyob txhua qhov chaw uas yuav tsum tau hloov theem xws li hauv cov theem tsav tsheb ntawm cov tshuab txiav tawm transistor tsis sib xws.

Kauj Ruam 4: Siv Op Amp Raws Li Square Wave rau Sine Wave Converter

Siv Op Amp Raws li Square Wave rau Sine Wave Converter
Siv Op Amp Raws li Square Wave rau Sine Wave Converter
Siv Op Amp Raws li Square Wave rau Sine Wave Converter
Siv Op Amp Raws li Square Wave rau Sine Wave Converter
Siv Op Amp Raws Li Square Wave rau Sine Wave Converter
Siv Op Amp Raws Li Square Wave rau Sine Wave Converter

Cov kab lus saum toj no yuav hloov pauv 1000 Hz square yoj mus rau 1000 Hz sine wave. Nws ua qhov no los ntawm kev lim tawm txhua qhov sib xyaw ua ke (sib haum xeeb) saum toj thiab hauv qab qhov tseem ceeb, uas yog sine wave. Hloov chaw ntawm kev siv cov tshuaj tiv thaiv kab mob hauv kev tawm tswv yim, peb siv cov khoom sib xyaw xaiv (cov khoom siv hluav taws xob) uas muab cov lus tsis zoo los thim tawm qhov tsis xav tau zaus. Cov duab kab nruab nrab qhia qhov tseeb ntawm qhov sim sim hauv Circuit Court thiab cov qauv siv hluav taws xob tsim tawm. Daim duab thib peb qhia txog kev teb zaus ntawm Circuit Court. Lub npe txheej txheem ntawm hom kev siv hluav taws xob no yog cov lim lim lim dej nquag. Nws tso cai tsuas yog cov nqaim nqaim ntawm cov zaus kom dhau los yam tsis tau ua kom qis.

Kauj Ruam 5: Siv Op Amp Ua Tus Sib Piv

Siv Op Amp Ua Tus Sib Piv
Siv Op Amp Ua Tus Sib Piv

Muaj cov nplooj siab uas yog cov sib piv zoo dua, tab sis qee zaum koj yuav tsis muaj ntawm tes, yog li nws ib txwm muaj txiaj ntsig kom paub yuav ua li cas thiaj ua tus sib piv tawm ntawm opamp. Kev tshuaj xyuas sai ntawm tus neeg sib piv yog dab tsi, nws yog ib qho opamp teeb tsa ua lub tshuab hluav taws xob tsis muaj kev tawm tswv yim, tso cai rau lub tshuab ua haujlwm kom ua haujlwm ntawm nws qhov nce siab. Thaum ib lub tswv yim tau txuas rau qhov tshwj xeeb xws li 3 volts uas qhia hauv daim duab kab lus lub Circuit Court yuav muab cov khoom tso tawm uas yuav luag qhov hluav taws xob ntau tshaj plaws thaum ob qhov kev nkag mus yog tib qhov hluav taws xob. Hauv qhov xwm txheej saum toj no, sine wave ntawm 1 kHz muab qhov tso tawm thaum nws nce siab dua 3 volts thiab hloov dua tshiab thaum sine yoj mus qis dua 3 volts. Cov sib piv feem ntau siv hauv (ADCs) thiab so oscillators.

Kauj Ruam 6: Txhim Kho Qhov Sib Txuas Nrog Lub Opamp

Tsim Ib Lub Suab Amplifier Nrog Opamp
Tsim Ib Lub Suab Amplifier Nrog Opamp

Kev suav lub suab nrov saum toj no siv ob lub cim 1 kHz, ib qho ntawm 10 mV ncov mus rau qhov siab thiab lwm qhov ntawm 20 mV ncov mus rau qhov siab. Cov txiaj ntsig tau tshwm sim yog 60 mV ncov rau ncov. Txij li nws yog qhov hloov pauv lub suab nrov, nws tso tawm lub teeb liab ntawm qib sib txawv.

Summing amplifiers tau siv hauv cov khoom sib xyaw suab qhov sib txawv xav tau ntxiv rau ua ke. Los ntawm kev pub cov paib rau hauv potentiometers, cov cim tuaj yeem sib txawv los muab cov txiaj ntsig xav tau.

Kauj Ruam 7: Peb Lub Tswv Yim Suab Tov Khoom

Peb Lub Tswv Yim Suab Tov Khoom
Peb Lub Tswv Yim Suab Tov Khoom

Lub tshuab hluav taws xob no tuaj yeem siv los sib xyaw ua ke ob lub twj paj nruas thiab lub suab hu, ntau lub tswv yim tuaj yeem ntxiv rau ntxiv raws li xav tau. Txhua qib nkag tau tuaj yeem hloov kho ntawm nws tus kheej nrog cov potentiometers.

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