Uhlalutyo lweempazamo zeNkqubo yePhotodetector

Uhlalutyo lweempazamo zeNkqubo yePhotodetector

Intshayelelo kwizinto ezichaphazela iimpazamo zenkqubo kwiIsixhobo sokubona iifoto

Izinto ezithile ekufuneka ziqwalaselwe xa kusenziwa impazamo ecwangcisiweyo ziquka: 1. Ukukhethwa kwecandelo:ii-photodiode, ii-amplifiers zokusebenza, ii-resistor, ii-capacitors, ii-ADC, ii-ics zombane, kunye nemithombo ye-voltage yereferensi. 2. Indawo yokusebenza: Impembelelo yobushushu kunye nokufuma, njl. 3. Ukuthembeka kwenkqubo: Uzinzo lwenkqubo, ukusebenza kwe-EMC.

Uhlalutyo lweeMpazamo zeNkqubo zeePhotodetectors

1. I-Photodiode: Kwi-aukufunyanwa kwe-photoelectricinkqubo, impembelelo yee-photodiode kwiimpazamo zeinkqubo yombaneibonakaliswa kakhulu kwezi nkalo zilandelayo:

(1) Uvakalelo (S)/ Isisombululo: Umlinganiselo wokunyuka kwesignali yesiphumo (i-voltage/current) △y ukuya kunyuko lokufaka △x olubangela ukwanda kokuphuma △y. Oko kukuthi, s=△y/△x. Uvakalelo/isisombululo yimeko ephambili yokukhethwa kwesenzi. Le parameter ibonakaliswa ngokukodwa kulwalamano oluthe ngqo lwee-photodiodes njengombane omnyama, nakwimbonakalo ethile yee-photodetectors njengamandla alinganayo nomsindo (NEP). Ke ngoko, uhlalutyo oluphambili lwempazamo ecwangcisiweyo lufuna ukuba uvakalelo (S)/isisombululo kufuneka lube phezulu kunemfuneko yempazamo yokwenyani ukuze kuhlangatyezwane neemfuno zempazamo zenkqubo yonke ye-photoelectric, njengoko impembelelo yempazamo ebangelwe zizinto ezikhankanyiweyo kamva nayo kufuneka iqwalaselwe.

(2) Umgca-mgca (δL): Umlinganiselo womgca-mgca wobudlelwane obuphakathi kwemveliso kunye nokufakwa kwesixhobo sokubona ifoto. I-yfs yimveliso epheleleyo, kwaye i-△Lm yimpompo ephezulu yomgca-mgca. Oku kubonakala ngokukodwa kumandla okukhanya okulinganayo kunye nomgca-mgca wesixhobo sokubona ifoto.

(3) Uzinzo/Ukuphindaphinda: I-photodetector ayinakho ukuhambelana kokuphuma kwento efanayo engenisiweyo ngokungacwangciswanga, nto leyo eyimpazamo engacwangciswanga. Kucingelwa ukuba kukho ukuphambuka okukhulu kwiindlela ezihamba phambili nezibuyela umva.

(4) I-Hysteresis: Imeko apho ii-curves ze-input-output ze-photodetector zingahambelani ngexesha lokuhamba kwayo phambili nangasemva.

(5) Ukushukuma kobushushu: Impembelelo yotshintsho ngalunye lwe-1℃ kubushushu kutshintsho lwemveliso yesixhobo sokufumana ifoto. Ukushukuma kobushushu △Tm okubangelwa kukushukuma kobushushu kubalwa ngokubalwa kokushukuma kobushushu bomgangatho wobushushu kwindawo yokusebenza △T.

(6) Ukutshintsha kwexesha: Imeko apho isiphumo se-photodetector sitshintsha ngokuhamba kwexesha xa i-input variable ingatshintshi (izizathu zibangelwa kakhulu kutshintsho kwisakhiwo sayo). Impembelelo epheleleyo yokuphambuka kwe-photodetector kwinkqubo ibalwa nge-vector sum.

2. Ii-amplifiers zokusebenza: IiParamitha eziphambili ezichaphazela impazamo yeNkqubo Ii-Amplifiers zokusebenza Ii-Vos ze-offset voltage, i-Vos temperature drift, i-input offset current Ios, i-Ios temperature drift, i-input bias current Ib, i-input impedance, i-input capacitance, ingxolo (ingxolo ye-input voltage, ingxolo ye-input current) Ingxolo ye-gain thermal yoyilo, i-power supply rejection ratio (PSRR), i-common-mode rejection ratio (CMR), i-open-loop gain (AoL), i-gain-bandwidth product (GBW), i-slew rate (SR), ixesha lokusekwa, i-total harmonic distortion.

Nangona iiparameters zee-amplifiers zokusebenza zibaluleke kakhulu kwicandelo lenkqubo njengokukhethwa kwee-photodiodes, ngenxa yokunqongophala kwendawo, iinkcazo ezithile zeeparameter kunye neenkcazo azizukucaciswa apha. Kuyilo lwangempela lwee-photodetectors, impembelelo yezi parameters kwiimpazamo zenkqubo kufuneka ihlolwe yonke. Nangona kungengazo zonke iiparameters ezinokuba nefuthe elikhulu kwiimfuno zeprojekthi yakho, kuxhomekeke kwiimeko zokwenyani zesicelo kunye neemfuno ezahlukeneyo, ezi parameters zingasentla ziya kuba nefuthe elahlukileyo kwiimpazamo zenkqubo.

Kukho iiparameter ezininzi zee-amplifiers zokusebenza. Kwiintlobo ezahlukeneyo zesignali, iiparameter eziphambili ezibangela iimpazamo ezicwangcisiweyo zinokujoliswa kwizibonakaliso zeDC kunye ne-AC: Izibonakaliso ze-DC variable voltage I-Vos, i-Vos temperature drift, i-input offset current Ios, i-input bias current Ib, i-input impedance, ingxolo (input voltage noise, input current noise, design gain thermal noise), i-power supply rejection ratio (PSRR), i-common-mode rejection ratio (CMRR). Isignali yokwahluka kwe-Ac: Ukongeza kwiiparameter ezingasentla, oku kulandelayo kufuneka kuqwalaselwe: i-input capacitance, i-open-loop gain (AoL), i-gain-bandwidth product (GBW), i-slew rate (SR), ixesha lokumiselwa, kunye ne-total harmonic distortion.