Kuongororwa kwezvikanganiso zveSisitimu yePhotodetector

Kuongororwa kwezvikanganiso zveSisitimu yePhotodetector

Nhanganyaya yezvinhu zvinopesvedzera zvikanganiso zvehurongwa muChinoongorora mufananidzo

Zvinhu zvakakosha zvekufunga nezvazvo pakukanganisa kwakarongeka zvinosanganisira: 1. Kusarudzwa kwezvikamu:mafotodiodhi, ma amplifiers anoshanda, ma resistors, ma capacitor, ma ADC, magetsi emagetsi, uye ma reference voltage sources. 2. Nzvimbo yekushanda: Simba rekupisa nehunyoro, nezvimwewo. 3. Kuvimbika kwesystem: Kugadzikana kwesystem, EMC performance.

Kuongorora Zvikanganiso zveSisitimu zvePhotodetectors

1. Photodiode: Munekuonekwa kwemagetsi emagetsihurongwa, simba remaphotodiode pazvikanganiso zvesisitimu yemagetsiinonyanya kuoneka muzvinhu zvinotevera:

(1) Kunzwa (S)/ Kugadziriswa: Chiyero chekuwedzera kwechiratidzo chekubuda (voltage/current) △y kune kuwedzera kwekupinda △x kunokonzera kuwedzera kwekubudisa △y. Kureva kuti, s=△y/△x. Kunzwa/kugadziriswa ndicho chinhu chikuru chinodiwa pakusarudzwa kwesensor. Iyi parameter inonyatsoonekwa mukuwirirana kwakananga kwemaphotodiodes serima remagetsi, uye mukuratidzwa kwakananga kwemaphotodetector sesimba rakaenzana neruzha (NEP). Saka, ongororo yakakosha yesystemic error inoda kuti sensitivity (S)/kugadziriswa kunofanirwa kunge kwakakwira kupfuura zvinodiwa zvekukanganisa chaiko kuitira kuti isangane nezvinodiwa zvekukanganisa zvesystem yese yemagetsi, sezvo kukanganisa kunokonzerwa nezvinhu zvataurwa gare gare kuchifanirawo kufungwa nezvazvo.

(2) Linearity (δL): Dhigirii rekuenderana kwehukama hwehuwandu pakati pezvinobuda nezvinopinzwa zve photodetector. yfs ndiyo output yakazara, uye △Lm ndiyo maximum deviation ye linearity. Izvi zvinoratidzwa zvakanyanya mu linearity uye linear saturation light power ye photodetector.

(3) Kugadzikana/Kudzokororwa: Photodetector ine kusawirirana kwezvinobuda pakupinda kwakafanana, inova kukanganisa kwakasarudzika. Kutsauka kukuru kwematanho ekumberi neashure kunoonekwa.

(4) Hysteresis: Chiitiko apo makombama echinhu chinoona kuti chinhu chinopinza-chinoburitsa chinhu (input-output curves) asingapindirani panguva yekufamba kwacho kuenda mberi nekudzokera shure.

(5) Kushanduka kwekupisa: Kukanganiswa kwekushanduka kwekupisa kwe1℃ pakuchinja kwezvinobuda mu photodetector. Kutsauka kwekushanduka kwekupisa kwe △Tm kunokonzerwa nekudonha kwekupisa kunoverengerwa kuburikidza nekuverengwa kwekushanduka kwekupisa kwenzvimbo yekushanda △T.

(6) Kufamba kwenguva: Chiitiko apo kubuda kwechinhu chinoona mifananidzo kuchichinja nekufamba kwenguva kana chinhu chinopinda chikaramba chisina kuchinja (zvikonzero zvacho zvinonyanya kukonzerwa nekuchinja kwechimiro chayo). Kuchinja kwakazara kwechinhu chinoona mifananidzo pahurongwa kunoverengerwa kuburikidza nevector sum.

2. Ma amplifiers ekushanda: MaParameter Akakosha Anokanganisa Kukanganisa kweSystem MaAmplifiers ekushanda Ma Offset voltage Vos, Vos temperature drift, input offset current Ios, Ios temperature drift, input bias current Ib, input impedance, input capacitance, noise (input voltage noise, input current noise) Dhizaini ye gain thermal noise, power supply rejection ratio (PSRR), common-mode rejection ratio (CMR), open-loop gain (AoL), gain-bandwidth product (GBW), slew rate (SR), establishment time, total harmonic distortion.

Kunyangwe ma parameter ema operating amplifiers akakosha sechikamu che system sekusarudza ma photodiodes, nekuda kwekusakwana kwenzvimbo, tsananguro dzema parameter chaiwo uye tsananguro hadzizotsanangurwi pano. Mukugadzirwa chaiko kwema photodetectors, simba rema parameter aya pa systematic errors rinofanira kuongororwa. Kunyangwe zvisiri zvese ma parameter zvinogona kuve nemhedzisiro yakakura pane zvinodiwa neprojekiti yako, zvichienderana nemamiriro chaiwo ekushandisa uye zvinodiwa zvakasiyana, ma parameter ari pamusoro achava nemhedzisiro yakasiyana pa systematic errors.

Kune ma parameter akawanda ema operational amplifiers. Kune mhando dzakasiyana dzesignal, ma parameter makuru anokonzera systematic errors anogona kutarisa paDC neAC signals: DC variable signals Input offset voltage Vos, Vos temperature drift, input offset current Ios, input bias current Ib, input impedance, noise (input voltage noise, input current noise, design gain thermal noise), power supply rejection ratio (PSRR), common-mode rejection ratio (CMRR). Ac variation signal: Kuwedzera kune ma parameter ari pamusoro apa, zvinotevera zvinofanirwawo kufungwa nezvazvo: input capacitance, open-loop gain (AoL), gain-bandwidth product (GBW), slew rate (SR), establishment time, uye total harmonic distortion.