Kev Tshawb Fawb Txog Qhov Yuam Kev ntawm Lub Tshuab Photodetector

Kev Tshawb Fawb Txog Qhov Yuam Kev ntawm Lub Tshuab Photodetector

Kev Taw Qhia Txog Cov Yam Cuam Tshuam ntawm Cov Yuam Kev ntawm Lub System hauvLub tshuab ntes duab

Cov kev txiav txim siab tshwj xeeb rau qhov yuam kev tsis tu ncua suav nrog: 1. Kev xaiv cov khoom:cov duab diodes, cov amplifiers ua haujlwm, resistors, capacitors, ADCs, fais fab mov ics, thiab cov chaw siv hluav taws xob. 2. Ib puag ncig ua haujlwm: Qhov cuam tshuam ntawm qhov kub thiab txias thiab av noo, thiab lwm yam. 3. Kev ntseeg tau ntawm lub kaw lus: Kev ruaj khov ntawm lub kaw lus, kev ua tau zoo ntawm EMC.

Kev Tshuaj Xyuas Qhov Yuam Kev ntawm Cov Duab Tshawb Pom

1. Photodiode: Hauv ib qhokev tshawb nrhiav photoelectricqhov system, qhov cuam tshuam ntawm cov photodiodes rau qhov yuam kev ntawmlub tshuab photoelectricfeem ntau yog pom tseeb hauv cov hauv qab no:

(1) Kev rhiab heev (S)/ Kev daws teeb meem: Qhov piv ntawm cov teeb liab tso zis (voltage/current) nce △y rau qhov nce ntawm cov tswv yim △x uas ua rau qhov tso zis nce △y. Ntawd yog, s = △y/△x. Kev rhiab heev/kev daws teeb meem yog qhov tseem ceeb rau kev xaiv sensor. Cov parameter no tau pom tseeb hauv kev sib raug zoo ntawm photodiodes ua qhov tsaus ntuj tam sim no, thiab hauv kev qhia tshwj xeeb ntawm photodetectors ua lub zog sib npaug suab nrov (NEP). Yog li ntawd, qhov kev tshuaj xyuas tseem ceeb tshaj plaws ntawm kev ua yuam kev systematic xav kom qhov rhiab heev (S)/ kev daws teeb meem yuav tsum siab dua qhov yuav tsum tau ua yuam kev tiag tiag kom ua tau raws li qhov yuav tsum tau ua yuam kev ntawm tag nrho lub photoelectric system, vim tias qhov cuam tshuam ntawm qhov yuam kev los ntawm cov yam ntxwv hais tom qab kuj yuav tsum tau xav txog.

(2) Linearity (δL): Qib ntawm linearity ntawm kev sib raug zoo ntawm qhov tso zis thiab qhov nkag ntawm lub photodetector. yfs yog qhov tso zis tag nrho, thiab △Lm yog qhov siab tshaj plaws ntawm linearity. Qhov no yog qhia tshwj xeeb hauv linearity thiab linear saturation lub zog teeb ntawm lub photodetector.

(3) Kev Ruaj Ntseg/Kev Rov Ua Dua: Lub photodetector muaj qhov tso zis tsis sib xws rau tib qho kev nkag random, uas yog qhov yuam kev random. Qhov kev hloov pauv siab tshaj plaws ntawm cov strokes pem hauv ntej thiab rov qab raug txiav txim siab.

(4) Hysteresis: Qhov xwm txheej uas cov kab input-output ntawm lub photodetector tsis sib tshooj thaum nws mus tom ntej thiab rov qab.

(5) Kev hloov pauv kub: Qhov cuam tshuam ntawm txhua qhov kev hloov pauv kub 1 ℃ rau qhov kev hloov pauv ntawm lub photodetector. Qhov kev hloov pauv kub △Tm los ntawm kev hloov pauv kub yog suav los ntawm kev suav qhov kub ntawm qhov chaw ua haujlwm kub △T.

(6) Lub Sijhawm Hloov Pauv: Qhov xwm txheej uas cov zis ntawm lub photodetector hloov pauv raws sijhawm thaum cov hloov pauv nkag tseem tsis hloov pauv (cov laj thawj feem ntau yog vim muaj kev hloov pauv hauv nws cov qauv sib xyaw). Qhov cuam tshuam ntawm kev hloov pauv ntawm lub photodetector ntawm lub kaw lus yog suav los ntawm vector sum.

2. Cov amplifiers ua haujlwm: Cov Kev Ntsuas Tseem Ceeb Cuam Tshuam rau qhov yuam kev ntawm lub kaw lus Cov Amplifiers ua haujlwm Offset voltage Vos, Vos kub hloov pauv, input offset tam sim no Ios, Ios kub hloov pauv, input bias tam sim no Ib, input impedance, input capacitance, suab nrov (input voltage suab nrov, input tam sim no suab nrov) Tsim qhov nce thermal suab nrov, lub zog muab hluav taws xob tsis lees txais piv (PSRR), hom kev tsis lees txais piv (CMR), qhib-loop nce (AoL), nce-bandwidth khoom (GBW), slew rate (SR), tsim lub sijhawm, tag nrho harmonic distortion.

Txawm hais tias cov kev cai ntawm cov amplifiers ua haujlwm tseem ceeb npaum li qhov kev xaiv ntawm cov photodiodes, vim muaj qhov chaw txwv, cov lus txhais thiab cov lus piav qhia tshwj xeeb yuav tsis raug piav qhia ntawm no. Hauv kev tsim qauv tiag tiag ntawm cov photodetectors, qhov cuam tshuam ntawm cov kev cai no rau qhov yuam kev systemic yuav tsum tau soj ntsuam txhua tus. Txawm hais tias tsis yog txhua qhov kev cai yuav muaj kev cuam tshuam loj rau koj qhov project xav tau, nyob ntawm qhov xwm txheej thov tiag tiag thiab kev thov sib txawv, cov kev cai saum toj no yuav muaj cov teebmeem sib txawv rau qhov yuam kev systemic.

Muaj ntau yam kev teeb tsa rau cov amplifiers ua haujlwm. Rau ntau hom teeb liab sib txawv, cov kev teeb tsa tseem ceeb uas ua rau muaj qhov yuam kev tsis tu ncua tuaj yeem tsom mus rau DC thiab AC teeb liab: DC teeb liab hloov pauv Input offset voltage Vos, Vos kub hloov pauv, 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 gain thermal suab nrov), fais fab mov tsis lees txais piv (PSRR), hom tsis lees txais piv (CMRR). Ac variation teeb liab: Ntxiv rau cov kev teeb tsa saum toj no, cov hauv qab no kuj yuav tsum tau xav txog: input capacitance, qhib-loop gain (AoL), gain-bandwidth product (GBW), slew rate (SR), tsim lub sijhawm, thiab tag nrho harmonic distortion.