Kev txheeb xyuas qhov System yuam kev ntawm Photodetector

Kev txheeb xyuas qhov System yuam kev ntawm Photodetector

I. Taw qhia txog qhov cuam tshuam ntawm qhov system yuam kev hauvPhotodetector

Cov kev txiav txim siab tshwj xeeb rau kev ua yuam kev muaj xws li: 1. Kev xaiv cov khoom siv:photodiodes, ua haujlwm amplifiers, resistors, capacitors, ADCs, fais fab mov ics, thiab siv qhov chaw voltage. 2. Kev ua haujlwm ib puag ncig: Kev cuam tshuam ntawm qhov kub thiab txias, thiab lwm yam. 3. Kev ntseeg tau ntawm qhov system: Kev ruaj ntseg, EMC kev ua haujlwm.

Ii. System yuam kev Analysis ntawm Photodetectors

1. Photodiode: Hauv aphotoelectric nrhiav pomsystem, cuam tshuam ntawm photodiodes ntawm qhov yuam kev ntawm covphotoelectric systemFeem ntau yog manifested nyob rau hauv cov nram qab no yam:

(1) Sensitivity (S) / Resolution: Qhov piv ntawm cov teeb liab tso zis (voltage / tam sim no) increment △y rau input increment △x uas ua rau cov zis increment △y. Ntawd yog, s = △y/△x. Sensitivity/resolution yog thawj yam mob rau kev xaiv sensor. Qhov no parameter yog tshwj xeeb tshaj yog manifested nyob rau hauv ncaj qha correlation ntawm photodiodes raws li tsaus nti tam sim no, thiab nyob rau hauv lub tshwj xeeb manifestation ntawm photodetectors raws li lub suab sib npaug zog (NEP). Yog li ntawd, qhov tseem ceeb tshaj plaws kev soj ntsuam ntawm kev ua yuam kev yuav tsum tau hais tias qhov rhiab heev (S) / kev daws teeb meem yuav tsum siab tshaj qhov yuav tsum tau ua yuam kev tiag tiag kom ua tau raws li qhov yuav tsum tau ua yuam kev ntawm tag nrho cov photoelectric system, raws li qhov yuam kev cuam tshuam los ntawm cov yam ntxwv tau hais tom qab kuj yuav tsum tau xav txog.

(2) Linearity (δL): Qhov degree ntawm linearity ntawm qhov kev sib raug zoo ntawm cov zis thiab cov tswv yim ntawm lub photodetector. yfs yog qhov tso zis tag nrho, thiab △Lm yog qhov sib txawv tshaj plaws ntawm linearity. Qhov no yog tshwj xeeb tshaj yog tshwm sim nyob rau hauv linearity thiab linear saturation lub teeb lub zog ntawm lub photodetector.

(3) Stability/Repeatability: Lub photodetector muaj cov zis inconsistency rau tib random input, uas yog ib tug random yuam kev. Qhov siab tshaj plaws kev sib txawv ntawm lub rau pem hauv ntej thiab rov qab strokes yog xam.

(4) Hysteresis: Qhov tshwm sim uas qhov kev tawm tswv yim-tso tawm tus yam ntxwv nkhaus ntawm lub photodetector tsis sib tshooj thaum nws mus rau pem hauv ntej thiab rov qab mus.

(5) Kub drift: Kev cuam tshuam ntawm txhua 1 ℃ hloov hauv qhov kub thiab txias ntawm qhov tso zis hloov pauv ntawm lub photodetector. Qhov kub drift sib txawv △Tm tshwm sim los ntawm qhov kub thiab txias yog xam los ntawm qhov ntsuas kub ntawm qhov ntsuas kub ntawm qhov chaw ua haujlwm kub ntau yam △T.

(6) Lub Sijhawm drift: Qhov tshwm sim uas qhov tso zis ntawm photodetector hloov pauv lub sijhawm thaum lub tswv yim sib txawv tseem tsis hloov pauv (qhov ua rau feem ntau yog vim muaj kev hloov pauv ntawm nws tus kheej cov qauv). Qhov kev sib txawv ntawm qhov cuam tshuam ntawm photodetector ntawm lub system yog xam los ntawm vector sum.

2. Kev ua haujlwm amplifiers: Cov Ntsiab Lus Tseem Ceeb cuam tshuam rau qhov yuam kev Kev ua haujlwm Amplifiers Offset voltage Vos, Vos kub drift, input offset tam sim no Ios, Ios kub drift, input bias tam sim no Ib, input impedance, input capacitance, suab nrov (input voltage suab nrov, input tam sim no suab nrov) Design gain thermal reject ratio (PS power supply ratio) (CMR), qhib-loop nce (AoL), nce-bandwidth khoom (GBW), slew rate (SR), lub sij hawm tsim, tag nrho harmonic distortion.

Txawm hais tias qhov tsis ua haujlwm ntawm kev ua haujlwm amplifiers yog ib qho tseem ceeb ntawm cov khoom siv raws li kev xaiv ntawm photodiodes, vim qhov chaw txwv, cov ntsiab lus tshwj xeeb thiab cov lus piav qhia yuav tsis raug piav qhia ntawm no. Nyob rau hauv qhov tseeb tsim ntawm photodetectors, lub hwj chim ntawm cov tsis nyob rau hauv systematic yuam kev yuav tsum tau soj ntsuam tag nrho. Txawm hais tias tsis yog txhua qhov kev ntsuas yuav muaj kev cuam tshuam loj rau koj qhov kev xav tau ntawm qhov project, nyob ntawm qhov tseeb daim ntawv thov scenarios thiab cov kev xav tau sib txawv, cov kev txwv saum toj no yuav muaj kev cuam tshuam sib txawv ntawm kev ua yuam kev.

Muaj ntau qhov kev txwv rau kev ua haujlwm amplifiers. Rau ntau hom teeb liab, qhov tseem ceeb tsis ua rau lub cev tsis zoo tuaj yeem raug tsom rau DC thiab AC cov cim: DC cov cim tsis sib xws Input offset voltage Vos, Vos kub drift, input offset tam sim no Ios, input bias tam sim no Ib, input impedance, suab nrov (input voltage suab nrov, input tam sim no suab nrov, tsim nce thermal suab nrov), RRPS rejection piv piv (RRPS rejection piv). Ac variation signal: Ntxiv nrog rau cov kev txwv saum toj no, cov hauv qab no kuj yuav tsum tau txiav txim siab: input capacitance, qhib-loop nce (AoL), nce-bandwidth khoom (GBW), slew rate (SR), lub sij hawm tsim, thiab tag nrho harmonic distortion.