Kusanthula Zolakwa Zadongosolo la Photodetector

Kusanthula Zolakwa Zadongosolo la Photodetector

I. Chiyambi cha Zomwe Zimayambitsa Zolakwika Zadongosolo muPhotodetector

Zomwe zimaganiziridwa pakulakwitsa mwadongosolo ndi izi: 1. Kusankha zigawo:ma photodiodes, ma amplifiers ogwira ntchito, resistors, capacitors, ADCs, ma ics magetsi, ndi magwero a magetsi. 2. Malo ogwirira ntchito: Chikoka cha kutentha ndi chinyezi, etc. 3. Kudalirika kwadongosolo: Kukhazikika kwadongosolo, ntchito ya EMC.

Ii. Kusanthula Kolakwika Kwadongosolo kwa Photodetectors

1. Photodiode: Mu akupezeka kwa photoelectricdongosolo, chikoka cha photodiodes pa zolakwa zaphotoelectric systemzimawonekera makamaka m'mbali izi:

(1) Kumverera (S)/ Kusamvana: Chiyerekezo cha chiwonjezeko cha siginecha (voltage/panopa) △y ku chiwonjezeko cholowetsa △x chomwe chimapangitsa kuti chiwonjezeko chotulutsa △y. Ndiye kuti, s=△y/△x. Sensitivity/resolution ndiye chofunikira kwambiri pakusankha sensa. Izi zimawonetsedwa makamaka pakulumikizana kwachindunji kwa ma photodiode ngati mdima wapano, komanso mawonetsedwe enieni a ma photodetectors ngati mphamvu yofanana ndi phokoso (NEP). Chifukwa chake, kuwunika kofunikira kwambiri pakulakwitsa mwadongosolo kumafunikira kuti kukhudzidwa (S)/kuwongolera kuyenera kukhala kokulirapo kuposa zomwe zimafunikira zolakwika kuti zikwaniritse zofunikira zamtundu wonse wamagetsi, chifukwa cholakwika chomwe chimabwera chifukwa cha zinthu zomwe zatchulidwa pambuyo pake ziyeneranso kuganiziridwa.

(2) Linearity (δL) : Mlingo wa mzere wa mgwirizano wochulukira pakati pa zotuluka ndi zolowetsa za photodetector. yfs ndiye kutulutsa kwathunthu, ndipo △Lm ndiye kupatuka kwakukulu kwa mzere. Izi makamaka akuwonetseredwa mu linearity ndi liniya machulukitsidwe kuwala mphamvu photodetector.

(3) Kukhazikika / Kubwereza: Chojambula chajambula chili ndi kusagwirizana kwa zotsatira za kulowetsedwa kwachisawawa komweko, komwe kumakhala kolakwika. Kupatuka kwakukulu kwa zikwapu zakutsogolo ndi kumbuyo kumaganiziridwa.

(4) Hysteresis: Chochitika chomwe mipiringidzo yolowera-zotulutsa ya chojambulajambula sichimadutsana paulendo wake wopita patsogolo ndi kubwerera m'mbuyo.

(5) Kutentha kwapang'onopang'ono: Chikoka cha 1 ℃ iliyonse kusintha kutentha pakusintha linanena bungwe la photodetector. Kupatuka kwa kutentha △Tm komwe kumachitika chifukwa cha kusuntha kwa kutentha kumawerengeredwa kudzera mu kuwerengera kwa kutentha kwa malo ogwirira ntchito △T.

(6) Kuthamanga kwa nthawi: Chochitika chomwe kutuluka kwa photodetector kumasintha pakapita nthawi pamene kusintha kolowera kumakhalabe kosasintha (zomwe zimayambitsa makamaka chifukwa cha kusintha kwa mapangidwe ake). Mphamvu yopatuka kwathunthu ya photodetector pamakina imawerengedwa kudzera mu kuchuluka kwa vector.

2. Ma amplifiers ogwirira ntchito: Zofunikira Zofunikira Zomwe Zikukhudza Kulakwitsa kwa System Operational Amplifiers Offset voltage Vos, Vos kutentha drift, input offset current Ios, Ios kutentha drift, input bias current Ib, input impedance, input capacitance, phokoso (input voltage input, input current phokoso) Design peza rejection of thermal rejection, RR rejection ratio, (CMR), phindu lotseguka (AoL), phindu la bandwidth (GBW), chiwopsezo chopha (SR), nthawi yokhazikitsidwa, kupotoza kwathunthu kwa harmonic.

Ngakhale magawo a ma amplifiers ogwirira ntchito ndi ofunikira gawo la dongosolo monga kusankha kwa ma photodiodes, chifukwa cha kuchepa kwa malo, matanthauzo enieni a parameter ndi mafotokozedwe ake sizidzafotokozedwa apa. M'mapangidwe enieni a photodetectors, chikoka cha magawowa pa zolakwika mwadongosolo ziyenera kuyesedwa. Ngakhale kuti sizinthu zonse zomwe zingakhudze zofunikira za polojekiti yanu, kutengera momwe mungagwiritsire ntchito ndi zofuna zosiyanasiyana, magawo omwe ali pamwambawa adzakhala ndi zotsatira zosiyana pa zolakwika mwadongosolo.

Pali magawo ambiri amplifiers ntchito. Kwa mitundu yosiyanasiyana yazizindikiro, magawo akulu omwe amayambitsa zolakwika mwadongosolo atha kuyang'ana pa ma siginecha a DC ndi AC: ma siginecha osinthika a DC Input offset voltage Vos, Vos kutentha drift, input offset current Ios, input bias current Ib, input impedance, phokoso (input voltage input, input current phokoso, design gain thermal phokoso), kukana kwa CMRR rejection (CMR rejection ratio) . Chizindikiro cha kusintha kwa Ac: Kuphatikiza pazigawo zomwe zili pamwambazi, zotsatirazi ziyenera kuganiziridwanso: mphamvu yolowera, kupindula kwa-loop (AoL), phindu la bandwidth (GBW), mlingo wopha (SR), nthawi yokhazikitsidwa, ndi kusokoneza kwathunthu kwa harmonic.