Tlhahlobo ea Liphoso tsa Tsamaiso ea Photodetector

Tlhahlobo ea Liphoso tsa Tsamaiso ea Photodetector

I. Kenyelletso ea Lintho tse Susumelletsang tsa Liphoso tsa Tsamaiso kaPhotodetector

Lintlha tse ikhethileng bakeng sa phoso e hlophisitsoeng li kenyelletsa: 1. Khetho ea likarolo:li-photodiode, li-amplifiers tse sebetsang, li-resistors, li-capacitor, li-ADC, li-ics tsa phepelo ea motlakase, le mehloli ea motlakase ea litšupiso. 2. Tikoloho ea mosebetsi: Tšusumetso ea mocheso le mongobo, joalo-joalo 3. Ho tšepahala ha tsamaiso: Ho tsitsisa ha tsamaiso, ts'ebetso ea EMC.

Ii. Tlhahlobo ea Phoso ea Sisteme ea Photodetectors

1. Photodiode: Ho aho lemoha ha photoelectrictsamaiso, tšusumetso ea photodiodes liphosong tsatsamaiso ea photoelectrice bonahala haholo-holo likarolong tse latelang:

(1) Kutloisiso (S)/ Qeto: Karo-karolelano ea lets'oao la tlhahiso (voltage/current) increment △y to input increment △x e bakang keketseho ea tlhahiso △y. Ke hore, s=△y/△x. Sensitivity/resolution ke boemo ba mantlha ba khetho ea sensor. Paramethara ena e bonahatsoa ka ho toba kamanong e tobileng ea li-photodiodes e le lefifi la hona joale, le ka pontšo e khethehileng ea li-photodetectors e le matla a lekanang le lerata (NEP). Ka hona, tlhahlobo ea mantlha ea phoso e hlophisitsoeng e hloka hore sensitivity (S)/resolution e be holimo ho feta tlhoko ea phoso ea nnete e le ho fihlela litlhoko tsa phoso tsa sistimi eohle ea photoelectric, kaha ts'ebetso ea phoso e bakiloeng ke lintlha tse boletsoeng hamorao le eona e hloka ho nahanoa.

(2) Linearity (δL) : Tekanyo ea linearity ea kamano ea palo pakeng tsa tlhahiso le tlhahiso ea photodetector. yfs ke tlhahiso e felletseng, 'me △Lm ke kheloha e kholo ea mola. Sena se bonahala ka ho hlaka ka matla a khanya ea linearity le linear saturation ea photodetector.

(3) Botsitso / Pheta-pheta: Photodetector e na le ho se lumellane ha tlhahiso bakeng sa ho kenya letsoho ho tšoanang, e leng phoso e sa tloaelehang. Ho kheloha ho hoholo ha liropo tse eang pele le tse ka morao ho nahanoa.

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(5) Mocheso oa ho hoholeha: Tšusumetso ea phetoho e 'ngoe le e' ngoe ea 1 ℃ mocheso ho phetoho e hlahisoang ke photodetector. Phapang ea mocheso oa mocheso △Tm o bakoang ke ho hoholeha ha mocheso o baloa ka lipalo tsa mocheso oa mocheso oa sebaka sa mosebetsi △T.

(6) Nako ea ho hoholeha: Ketsahalo eo tlhahiso ea photodetector e fetohang ha nako e ntse e feta ha phetoho e kenang e ntse e sa fetohe (lisosa li bakoa haholo ke liphetoho tsa sebopeho sa eona sa sebopeho). Tšusumetso e pharaletseng ea ho kheloha ea photodetector tsamaisong e baloa ka chelete ea vector.

2. Li-amplifiers tsa ts'ebetso: Li-parameter tsa bohlokoa tse amang phoso ea tsamaiso Operational Amplifiers Offset voltage Vos, Vos mocheso drift, input offset current Ios, Ios drift, input bias current Ib, input impedance, input capacitance, lerata (input voltage lerata, input current lerata) Design fumana thermal rejection ratio, RR rejection ratio (CMR), phaello e bulehileng (AoL), sehlahisoa sa phaello-bandwidth (GBW), sekhahla se bolailoeng (SR), nako ea ho theha, ho sotha ho felletseng.

Le hoja mekhahlelo ea li-amplifiers tse sebetsang e le karolo ea tsamaiso ea bohlokoa joaloka khetho ea photodiode, ka lebaka la meeli ea sebaka, litlhaloso le litlhaloso tse khethehileng tsa parameter li ke ke tsa hlalosoa mona. Moqapi oa 'nete oa li-photodetectors, tšusumetso ea mekhahlelo ena ka liphoso tse hlophisitsoeng kaofela e lokela ho hlahlojoa. Leha e se litlhophiso tsohle tse ka bang le tšusumetso e kholo litlhoko tsa projeke ea hau, ho ipapisitse le maemo a nnete a ts'ebeliso le litlhoko tse fapaneng, lintlha tse kaholimo li tla ba le litlamorao tse fapaneng liphosong tse hlophisitsoeng.

Ho na le li-parameter tse ngata bakeng sa li-amplifiers tse sebetsang. Bakeng sa mefuta e fapaneng ea matšoao, li-parameter tse ka sehloohong tse bakang liphoso tse hlophisitsoeng li ka tsepamisoa ho matšoao a DC le a AC: matšoao a feto-fetohang a DC Input offset voltage Vos, Vos drift drift, input offset current Ios, input bias current Ib, input impedance, lerata (input voltage lerata, input current lerata, design gain thermal lerata), rejection ratio (CMRR rejection ratio) . Letšoao la phetoho ea Ac: Ho phaella ho li-parameter tse ka holimo, tse latelang li boetse li lokela ho nahanoa: bokhoni ba ho kenya letsoho, phaello e bulehileng ea loop (AoL), sehlahisoa sa gain-bandwidth (GBW), sekhahla se bolailoeng (SR), nako ea ho thehoa, le ho sotha hohle ha harmonic.