Kuongororwa kweSystem Zvikanganiso zvePhotodetector

Kuongororwa kweSystem Zvikanganiso zvePhotodetector

I. Nhanganyaya kune Zvinofurira Zvinhu zveSystem Errors muPhotodetector

Mafungiro chaiwo ekukanganisa kwakarongeka anosanganisira: 1. Kusarudzwa kwechikamu:photodiodes, mashandiro eamplifiers, resistors, capacitors, ADCs, magetsi emagetsi ics, uye referensi voltage masosi. 2. Nzvimbo yekushanda: Kufuridzirwa kwekushisa uye humidity, nezvimwewo 3. Kuvimbika kweSystem: Kugadzikana kweSystem, EMC performance.

Ii. System Kukanganisa Kuongorora kwePhotodetectors

1. Photodiode: Mune aphotoelectric kuonekwasystem, pesvedzero yephotodiodes pane zvikanganiso zvephotoelectric systeminonyanya kuratidzwa muzvikamu zvinotevera:

(1) Sensitivity (S)/ Resolution: Chiyero chechiratidzo chekubuda (voltage/yazvino) kuwedzera △y kune iyo yekuisa increment △x inokonzeresa kuwedzera kwekubuda △y. Kureva kuti, s=△y/△x. Sensitivity/resolution ndiyo yekutanga mamiriro ekusarudza sensor. Iyi parameter inonyatso kuratidzwa mukubatana kwakananga kwemafotodiode seyakasviba ikozvino, uye mune chaiyo kuratidzwa kwemafotodetectors seruzha rakaenzana simba (NEP). Naizvozvo, kuongororwa kwakakosha kwekukanganisa kwakarongeka kunoda kuti sensitivity (S)/ resolution inofanirwa kunge yakakwira kupfuura iyo chaiyo yekukanganisa zvinodiwa kuti isangane nezvikanganiso zveiyo yese photoelectric system, sezvo kukanganisa kwakakonzerwa nezvinhu zvataurwa gare gare zvinodawo kutariswa.

(2) Linearity (δL) : Chiyero chemutsara wehuwandu hwehukama pakati pekubuda uye kuiswa kwe photodetector. yfs ndiyo yakazara-chiyero kuburitsa, uye △Lm ndiyo yakanyanya kutsauka yemutsara. Izvi zvinonyatso kuratidzwa mumutsara uye mutsara saturation mwenje simba reiyo photodetector.

(3) Kugadzikana / Kudzokororwa: Iyo photodetector ine zvakabuda zvisingaenderani kune imwechete yakasarudzika yekuisa, iyo inongoitika kukanganisa. Iyo yakanyanya kutsauka yekumberi uye kumashure maronda inofungidzirwa.

(4) Hysteresis: Chiitiko apo kupinza-kubuda kwemaitiro macurves ephotodetector haapindire panguva yayo yekuenda mberi nekudzoka shure.

(5) Kunyura kwekushisa: Kufuridzira kwega yega 1 ℃ shanduko yekushisa pane inobuda shanduko yephotodetector. Tembiricha yekudonha kutsauka △Tm inokonzerwa nekudonha kwetembiricha inoverengerwa kuburikidza netembiricha yekudonha kuverengera kwenzvimbo yekushanda tembiricha renji △T.

(6) Nguva yekudonha: Chiitiko icho chinobuda chephotodetector chinoshanduka nekufamba kwenguva apo shanduko yekuisa inoramba isina kuchinjika (zvikonzero zvinonyanya kukonzerwa nekushandurwa kweiyo yega kuumbwa kwayo). Iyo yakazara kutsauka pesvedzero yephotodetector pane system inoverengerwa kuburikidza nevector sum.

2. Operational amplifiers: Key Parameters Affecting System kukanganisa Operational Amplifiers Offset voltage Vos, Vos tembiricha drift, input offset ikozvino Ios, Ios tembiricha drift, kuisa bias current Ib, impedance yokupinza, kuisa capacitance, ruzha (input voltage noise, input current noise) Dhizaini kuwana thermal rejection reshiyo, dhizaini rejection rejection, PS dhizaini rejection (CMR), kuvhurika-loop kuwana (AoL), kuwana-bandwidth chigadzirwa (GBW), akauraya mwero (SR), nguva yekugadzwa, yakazara harmonic kukanganisa.

Kunyangwe iwo maparamita eanoshanda amplifiers akakosha sechikamu chehurongwa sekusarudzwa kwemafotodiode, nekuda kwekugumira kwenzvimbo, iyo chaiyo parameter tsananguro uye tsananguro hazvizotsanangurwa pano. Mune chaiyo dhizaini yemafotodetectors, pesvedzero yeiyi paramita pane yakarongeka zvikanganiso zvese zvinofanirwa kuongororwa. Kunyangwe asiri ese maparamendi anogona kuve nemhedzisiro yakakosha pane zvaunoda purojekiti, zvichienderana nemamiriro chaiwo ekushandisa uye zvakasiyana zvinodiwa, ma paramita ari pamusoro achave nemhedzisiro yakasiyana pakukanganisa kwakarongeka.

Kune akawanda ma parameter ekushanda amplifiers. Kune mhando dzakasiyana dzechiratidzo, iyo huru paramita inokonzera kukanganisa kwakarongeka inogona kutariswa paDC uye AC masiginecha: DC inochinja masaini Input offset voltage Vos, Vos tembiricha drift, input offset current Ios, input bias current Ib, input impedance, ruzha (input voltage noise, input current noise, design gain thermal noise), common supply rejection (CMRR rejection) . Ac variation chiratidzo: Pamusoro peiyo iri pamusoro apa paramita, zvinotevera zvinodawo kutariswa: kugona kwekuisa, kuvhurika-loop kuwana (AoL), kuwana-bandwidth chigadzirwa (GBW), kuuraya mwero (SR), nguva yekugadzwa, uye yakazara harmonic kukanganisa.