Tlhahlobo ea Liphoso tsa Sistimi ea Photodetector

Tlhahlobo ea Liphoso tsa Sistimi ea Photodetector

Selelekela sa Mabaka a Susumetsang Liphoso tsa Sisteme hoSesebelisoa sa ho lemoha foto

Lintho tse ikhethileng tse lokelang ho nahanoa bakeng sa phoso e hlophisitsoeng li kenyelletsa: 1. Khetho ea likarolo:diode tsa difoto, li-amplifier tse sebetsang, li-resistor, li-capacitor, li-ADC, li-ics tsa phepelo ea motlakase, le mehloli ea motlakase oa litšupiso. 2. Tikoloho ea ho sebetsa: Tšusumetso ea mocheso le mongobo, jj. 3. Botšepehi ba sistimi: Botsitso ba sistimi, ts'ebetso ea EMC.

Tlhahlobo ea Liphoso tsa Sistimi ea Li-Photodetector

1. Photodiode: Ka hare hoho lemoha photoelectrictsamaiso, tšusumetso ea li-photodiode liphosong tsasistimi ea motlakase oa photoelectrice bonahala haholo-holo lintlheng tse latelang:

(1) Kutlo (S)/ Qeto: Karolelano ea keketseho ea lets'oao la tlhahiso (voltage/current) △y ho keketseho ea ho kenya △x e bakang keketseho ea tlhahiso △y. Ke hore, s=△y/△x. Kutlo/qeto ke boemo ba mantlha bakeng sa khetho ea sensor. Paramethara ena e bonahala ka ho khetheha kamanong e tobileng ea li-photodiode e le motlakase o lefifi, le ponahalong e ikhethileng ea li-photodetector e le matla a lekanang le lerata (NEP). Ka hona, tlhahlobo ea motheo ka ho fetisisa ea phoso e hlophisitsoeng e hloka hore kutlo (S)/qeto e be holimo ho feta tlhoko ea 'nete ea phoso e le ho fihlela litlhoko tsa phoso tsa sistimi eohle ea photoelectric, kaha tšusumetso ea phoso e bakoang ke lintlha tse boletsoeng hamorao le eona e hloka ho nahanoa.

(2) Linearity (δL): Tekanyo ea linearity ea kamano ea bongata pakeng tsa tlhahiso le ho kenngoa ha photodetector. yfs ke tlhahiso e felletseng, 'me △Lm ke kheloho e kholo ea linearity. Sena se bonahatsoa ka ho khetheha matleng a linearity le linear saturation ea photodetector.

(3) Ho Tsitsisa/Ho Pheta-pheta: Sesebelisoa sa ho lemoha foto se na le ho se tsitse ha tlhahiso bakeng sa tlhahiso e tšoanang e sa reroang, e leng phoso e sa reroang. Ho nahannoa ka ho kheloha ho hoholo ha li-stroke tsa pele le tsa morao.

(4) Hysteresis: Ketsahalo eo ho yona di-curve tse ikgethang tsa ho kenya le ho ntsha ha photodetector di sa kopaneng nakong ya leeto la yona la ho ya pele le la ho kgutlela morao.

(5) Ho kheloha ha mocheso: Tšusumetso ea phetoho e 'ngoe le e 'ngoe ea mocheso oa 1℃ phetohong ea tlhahiso ea sesebelisoa sa ho lemoha foto. Ho kheloha ha mocheso ho bakoang ke ho kheloha ha mocheso ho baloa ka ho baloa ha mocheso ho kheloha ha mocheso oa sebaka sa mocheso sa tikoloho ea mosebetsi △T.

(6) Ho kheloha ha nako: Ketsahalo eo tlhahiso ea sesebelisoa sa ho lemoha litšoantšo e fetohang ha nako e ntse e ea ha phetoho ea ho kenya e lula e sa fetohe (lisosa li bakoa haholo ke liphetoho sebopehong sa eona sa sebopeho). Tšusumetso e felletseng ea ho kheloha ha sesebelisoa sa ho lemoha litšoantšo tsamaisong e baloa ka kakaretso ea vector.

2. Li-amplifier tsa ts'ebetso: Liparamithara tsa Bohlokoa tse Amang phoso ea Sistimi Li-amplifier tsa Ts'ebetso Li-voltage tsa Offset Vos, Vos temperature drift, input offset current Ios, Ios temperature drift, input bias current Ib, input impedance, input capacitance, lerata (lerata la motlakase oa input, lerata la motlakase oa input) Design gain thermal lerata, power supply rejection ratio (PSRR), common-mode rejection ratio (CMR), open-loop gain (AoL), gain-bandwidth product (GBW), slew rate (SR), the establishment time, total harmonic distortion.

Leha diparamithara tsa di-amplifier tsa tshebetso e le karolo ya bohlokwa ya sistimi jwalo ka kgetho ya di-photodiode, ka lebaka la meedi ya sebaka, ditlhaloso le ditlhaloso tse ikgethang tsa diparamithara di ke ke tsa hlaloswa mona. Moralong wa sebele wa di-photodetector, tshusumetso ya diparamithara tsena diphosong tse hlophisehileng e lokela ho lekolwa kaofela. Le hoja e se diparamithara tsohle tse ka bang le tshusumetso e kgolo ditlhokong tsa projeke ya hao, ho itshetlehile ka maemo a sebele a tshebediso le ditlhoko tse fapaneng, diparamithara tse ka hodimo di tla ba le ditlamorao tse fapaneng diphosong tse hlophisehileng.

Ho na le diparamithara tse ngata bakeng sa di-amplifier tsa tshebetso. Bakeng sa mefuta e fapaneng ya matshwao, diparamithara tse ka sehloohong tse bakang diphoso tsa tsamaiso di ka tsepamiswa hodima matshwao a DC le a AC: Matshwao a feto-fetohang a DC Voltage ya input offset Vos, Vos temperature drift, input offset current Ios, input bias current Ib, input impedance, lerata (input voltage lerata, input current lerata, design gain thermal lerata), power supply rejection ratio (PSRR), common-mode rejection ratio (CMRR). Ac variation signal: Ntle le diparamithara tse ka hodimo, tse latelang le tsona di hloka ho nahanelwa: input capacitance, open-loop gain (AoL), gain-bandwidth product (GBW), slew rate (SR), the establishment time, le total harmonic distortion.