Isesengura ry'amakosa ya sisitemu ya Photodetector

Isesengura ry'amakosa ya sisitemu ya Photodetector

Intangiriro ku bintu bigira ingaruka ku makosa ya sisitemu muriImashini ipima foto

Ingingo zihariye zigomba kwitabwaho ku ikosa rya gahunda zirimo: 1. Guhitamo ibice:amafotodiode, amplifiers z'imikorere, resistor, capacitors, ADCs, amashanyarazi, n'amasoko y'amashanyarazi. 2. Ahantu hakorerwa: Ingaruka z'ubushyuhe n'ubushuhe, n'ibindi. 3. Kwizerwa kwa sisitemu: Gukomera kwa sisitemu, imikorere ya EMC.

Isesengura ry'amakosa ya sisitemu ku bikoresho bipima amashusho

1. Fotodiode: Murigupima amashanyarazisisitemu, ingaruka za photodiode ku makosa yasisitemu y'amashanyaraziahanini bigaragarira mu ngingo zikurikira:

(1) Ubushobozi bwo gupima (S) / Ubushobozi bwo gupima: Igipimo cy'ubwiyongere bw'ikimenyetso cy'umusaruro (voltage/current) △y n'ubwiyongere bw'umusaruro △x butuma umusaruro wiyongera △y. Ni ukuvuga s=△y/△x. Ubushobozi bwo gupima/ubushobozi ni cyo kintu cy'ingenzi gikurikizwa mu guhitamo sensor. Iki gipimo kigaragara cyane mu isano iri hagati ya photodiode nk'umugezi wijimye, no mu buryo bwihariye bwa photodetectors nk'imbaraga zingana n'urusaku (NEP). Kubwibyo, isesengura ry'ibanze ry'ikosa rya gahunda risaba ko ubushobozi bwo gupima (S) / ubushobozi bugomba kuba buri hejuru y'igisabwa cy'ikosa nyacyo kugira ngo huzuzwe ibisabwa by'ikosa rya sisitemu yose y'amashanyarazi, kuko ingaruka z'ikosa ziterwa n'ibintu byavuzwe nyuma nazo zigomba gusuzumwa.

(2) Umurongo (δL): Urugero rw'umurongo w'isano iri hagati y'ibisohoka n'ibisohoka bya fotodetekta. yfs ni umusaruro wuzuye, naho △Lm ni ukunyuranya ntarengwa kw'umurongo. Ibi bigaragarira cyane cyane mu mbaraga z'urumuri rw'umurongo n'urumuri rw'umurongo rw'umurongo rwa fotodetekta.

(3) Guhagarara/Gusubiramo: Ikigo gishinzwe gupima amashusho gifite ubushobozi bwo gutanga amakuru mu buryo butunguranye, ibyo bikaba ari ikosa ritunguranye. Harebwa uburyo ntarengwa bwo gutandukanya amashusho imbere n'inyuma.

(4) Hysteresis: Ikintu aho imirongo iranga icyuma gipima foto idahurirana mu gihe cyo kugenda imbere no inyuma.

(5) Guhindagurika kw'ubushyuhe: Ingaruka za buri mpinduka ya 1℃ mu bushyuhe ku mpinduka z'umusaruro w'icyuma gipima foto. Guhindagurika kw'ubushyuhe △Tm guterwa no guhinduka k'ubushyuhe bibarwa binyuze mu kubara guhindagurika kw'ubushyuhe bw'ahantu hakorerwa △T.

(6) Guhindagurika kw'igihe: Ikintu aho umusaruro w'icyuma gipima foto uhinduka uko igihe kigenda iyo ihinduka ryinjira ritahindutse (impamvu ahanini ziterwa n'impinduka mu miterere y'imiterere yacyo). Ingaruka zose z'icyuma gipima foto kuri sisitemu zibarwa binyuze mu gipimo cy'ikigereranyo.

2. Amplifiers z'imikorere: Ibipimo by'ingenzi bigira ingaruka ku ikosa rya sisitemu Amplifiers z'imikorere Vos ya offset voltage, 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) Design 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.

Nubwo ibipimo bya amplifiers z'imikorere ari ingenzi mu gice cya sisitemu kimwe no guhitamo photodiodes, bitewe n'aho umwanya ugarukira, ibisobanuro byihariye bya parametre n'ibisobanuro ntibizasobanurwa hano. Mu miterere nyayo ya photodetectors, ingaruka z'ibi bipimo ku makosa ya gahunda zigomba gusuzumwa zose. Nubwo atari ibipimo byose bishobora kugira ingaruka zikomeye ku byo umushinga wawe ukeneye, bitewe n'ibihe nyabyo byo gukoresha n'ibisabwa bitandukanye, ibi bipimo byavuzwe haruguru bizagira ingaruka zitandukanye ku makosa ya gahunda.

Hari ibipimo byinshi bya amplifiers z'imikorere. Ku bwoko butandukanye bw'ibimenyetso, ibipimo by'ingenzi bitera amakosa mu buryo bw'imikorere bishobora kwibandwa ku bimenyetso bya DC na AC: Ibimenyetso bihindagurika bya DC Voltage ya offset 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: Uretse ibipimo byavuzwe haruguru, ibi bikurikira nabyo bigomba kwitabwaho: input capacitance, open-loop gain (AoL), gain-bandwidth product (GBW), slew rate (SR), establishment time, na total harmonic distortion.