Uhlalutyo lweempazamo zeNkqubo yeFotodetector

Uhlalutyo lweempazamo zeNkqubo yeFotodetector

I. Intshayelelo kwiiFactors ezinempembelelo yeempazamo zeNkqubo kwiIsikhangeli seefoto

Iingqwalasela ezithile zempazamo ecwangcisiweyo zibandakanya: 1. Ukhetho lwamacandelo:iifotodiodes, ii-amplifiers zokusebenza, izixhasi, ii-capacitors, ii-ADCs, ii-ics zobonelelo lwamandla, kunye nemithombo yombane yereferensi. 2. Indawo yokusebenza: Impembelelo yeqondo lokushisa kunye nomswakama, njl. 3. Ukuthembeka kwenkqubo: Ukuzinza kwenkqubo, ukusebenza kwe-EMC.

Ii. Uhlalutyo lwemposiso yeNkqubo yeeFotodetectors

1. Photodiode: Kwi-aukubonwa kombaneinkqubo, impembelelo yeefotodiodes kwiimpazamo zeinkqubo photoelectricibonakala ikakhulu kule miba ilandelayo:

(1) Uvakalelo (S)/ Isisombululo: Umlinganiselo wophawu oluphumayo (ivoltage/yangoku) unyuso △y kunyuso lwegalelo △x olubangela ukonyuka kwemveliso △y. Oko kukuthi, s=△y/△x. Uvakalelo/isisombululo yimeko ephambili yokukhethwa koluvo. Le parameter ibonakaliswe ngokuthe ngqo kukulungelelaniswa okuthe ngqo kweefotodiodes njengobumnyama bangoku, kunye nokubonakaliswa okuthe ngqo kweefotodetectors njengamandla alingana nomsindo (NEP). Ke ngoko, olona hlalutyo lusisiseko lwempazamo ecwangcisiweyo lufuna ukuba ubuntununtunu (S)/isisombululo kufuneka sibe phezulu kuneyona mfuneko yempazamo ukuze kuhlangatyezwane neemfuno zempazamo yenkqubo yombane yombane, njengoko impembelelo yempazamo ebangelwe yimiba ekhankanywe kamva nayo kufuneka iqwalaselwe.

(2) Umgca (δL) : Iqondo lomgca wobudlelwane bobungakanani phakathi kwemveliso kunye negalelo lefotodetector. yfs sisiphumo esipheleleyo, kwaye △Lm yeyona nto iphezulu yokutenxa kumgca. Oku kubonakaliswa ngokuthe ngqo kumgca kunye nomgca wokukhanya kwamandla okukhanya kwe-photodetector.

(3) Ukuzinza / ukuphindaphinda: I-photodetector ine-outpuste inconsistency for the same input random, okuyiphutha elingahleliwe. Ukuphambuka okuphezulu kokuhamba phambili kunye nokubuyela umva kuqwalaselwa.

(4) I-Hysteresis: Isiganeko apho i-input-output character curves ye-photodetector ayihambelani ngexesha lokuhamba kwayo phambili kunye nokubuyisela umva.

(5) Ubushushu bokushisa: Impembelelo ye-1℃ nganye utshintsho kwiqondo lokushisa kwinguqu yemveliso ye-photodetector. Uphambuko lweqondo lobushushu △Tm olubangwa kukukhukuliseka kweqondo lobushushu kubalwa ngeqondo lokukhukuliseka kubalo loluhlu lobushushu obungqongileyo ekusebenzayo △T.

(6) Ixesha lokuhamba: I-phenomenon apho umphumo we-photodetector utshintsha ngexesha xa igalelo legalelo lihlala lingatshintshi (izizathu zibangelwa kakhulu utshintsho kwisakhiwo sayo sokubunjwa). Impembelelo yokutenxa ebanzi ye-photodetector kwisistim ibalwa nge-vector sum.

2. I-Amplifaya eziSebenzayo: IiParameters eziphambili ezichaphazela impazamo yeNkqubo yokuSebenza i-Amplifaya ye-Offset voltage Vos, i-Vos yeqondo lokushisa, i-input offset ye-Ios yangoku, i-Ios yokushisa i-drift, i-input bias yangoku i-Ib, i-impedance ye-input, i-input capacitance, ingxolo (ingxolo ye-input voltage, i-input current ingxolo) Uyilo lokufumana i-thermal rejection ratio, i-Red rejection ratio, i-R. (CMR), i-loop-loop gain (AoL), imveliso yokufumana i-bandwidth (i-GBW), i-slew rate (SR), ixesha lokusekwa, ukuchithwa kwe-harmonic ngokupheleleyo.

Nangona iiparameters ze-amplifiers zokusebenza zibaluleke njengecandelo lenkqubo njengokukhethwa kweefotodiodes, ngenxa yokunciphisa indawo, iinkcazo zeparameter ezithile kunye neenkcazo aziyi kuchazwa apha. Kuyilo lwangempela lweefotodetectors, impembelelo yale parameters kwiimpazamo ezicwangcisiweyo kufuneka zonke zivavanywe. Nangona ingezizo zonke iiparameters ezinokuba nempembelelo ebalulekileyo kwiimfuno zeprojekthi yakho, ngokuxhomekeke kwiimeko zokwenyani zesicelo kunye neemfuno ezahlukeneyo, ezi parameters zingentla ziya kuba neziphumo ezahlukileyo kwiimpazamo ezicwangcisiweyo.

Kukho iiparameters ezininzi zeamplifiers zokusebenza. Kwiintlobo zeempawu ezahlukeneyo, iiparamitha eziphambili ezibangela iimpazamo ezicwangcisiweyo zinokujoliswa kwizibonakaliso ze-DC kunye ne-AC: iimpawu ze-DC eziguquguqukayo ze-Input offset voltage Vos, i-Vos yokushisa i-drift, i-input offset ye-Ios yangoku, i-input bias yangoku Ib, i-impedance ye-input, ingxolo (ingxolo ye-input voltage, ingxolo ye-input yangoku, i-design gain ingxolo ye-thermal), i-dizayini yokuzuza ingxolo ye-thermal), i-rejection ye-CMR rejection ratio (i-CMR rejection rejection). Isibonakaliso sokutshintsha kwe-Ac: Ukongeza kwiiparamitha ezingentla, oku kulandelayo kufuneka kuqwalaselwe: i-input capacitance, i-open-loop gain (AoL), imveliso ye-gain-bandwidth (GBW), i-slew rate (SR), ixesha lokusekwa, kunye nokuphazamiseka okupheleleyo kwe-harmonic.