Ka Ikepili o na Hapa Pūnaewele o Photodetector

Ka Ikepili o na Hapa Pūnaewele o Photodetector

I. Introduction to the influence Factors of System Errors inMea ʻike kiʻi

ʻO nā manaʻo kikoʻī no ka hewa ʻōnaehana penei: 1. Ke koho ʻana i nā mea:photodiodes, nā mea hoʻonui hana, nā mea kū'ē, nā capacitors, nā ADC, nā ics hāʻawi mana, a me nā kumu uila kuhikuhi. 2. Kaiapuni hana: Ka hopena o ka mahana a me ka haʻahaʻa, a me nā mea'ē aʻe.

Ii. Nānā Hapa Pūnaehana o nā Photodetectors

1. Photodiode: Ma kahiʻike kiʻi uilaʻōnaehana, ka mana o nā photodiodes i nā hewa o kaʻōnaehana photoelectrichōʻike nui ʻia ma nā ʻano aʻe:

(1) ʻIke (S)/ Hoʻoholo: ʻO ka lakio o ka hōʻailona hoʻopuka (voltage/current) hoʻonui △y i ka hoʻonui hoʻokomo △x e hoʻonui ai i ka hoʻonui △y. ʻO ia hoʻi, s=△y/△x. ʻO ka sensitivity/resolution ke kumu mua no ke koho ʻana i ka sensor. Hōʻike pono ʻia kēia ʻāpana i ka hoʻopili pololei ʻana o nā photodiodes e like me ka pōʻeleʻele o kēia manawa, a ma ka hōʻike kikoʻī o nā photodetectors e like me ka noise equivalent power (NEP). No laila, ʻo ka loiloi kumu nui o ka hewa systematic pono e ʻoi aku ka kiʻekiʻe o ka sensitivity (S)/ hoʻonā ma mua o ke koi hewa maoli i mea e hoʻokō ai i nā koi hewa o ka ʻōnaehana photoelectric holoʻokoʻa, no ka mea, pono e noʻonoʻo ʻia ka hopena hewa i nā kumu i haʻi ʻia ma hope.

(2) Linearity (δL): ʻO ke kiʻekiʻe o ka linearity o ka pilina nui ma waena o ka hoʻopuka a me ka hoʻokomo o ka photodetector. ʻO yfs ka mea hoʻopuka piha piha, a ʻo △Lm ka ʻoi loa o ka wehe ʻana o ka laina. Hōʻike ʻia kēia ma ka linearity a me ka linear saturation light power o ka photodetector.

(3) Paʻa/Repeatability: Loaʻa i ka photodetector ka like ʻole o ka puka ʻana no ka hoʻokomo ʻokoʻa like ʻole, ʻo ia ke kuhi hewa. Noʻonoʻo ʻia ka ʻokoʻa kiʻekiʻe o ka hana i mua a i hope.

(4) Hysteresis: ʻO ke ʻano o nā ʻōkuhi ʻano hoʻokomo-puka ʻole o ka mea nānā kiʻi kiʻi i ʻāwili ʻole i kāna huakaʻi i mua a i hope.

(5) Ka hoʻoheheʻe wela: ʻO ka mana o kēlā me kēia 1 ℃ hoʻololi i ka mahana ma ka hoʻololi puka o ka photodetector. Ua helu ʻia ka hoʻokaʻawale ʻana o ke ana wela △Tm ma muli o ka hoʻoheheʻe ʻana o ka mahana ma o ka helu ʻana o ka wela wela o ke kaiapuni hana △T.

(6) Time drift: ʻO ke ʻano o ka hoʻololi ʻana o ka mea nānā kiʻi kiʻi i ka manawa ke hoʻololi ʻole ʻia ka hoʻololi hoʻokomo (ʻo ka hapa nui o nā kumu ma muli o ka hoʻololi ʻana i kāna ʻano haku mele ponoʻī). Ua helu ʻia ka mana hoʻokaʻawale piha o ka mea nānā kiʻi ma ka ʻōnaehana ma o ka huina vector.

2. Nā mea hoʻonui hana: Key Parameters Affecting System Error Operational Amplifiers Offset voltage Vos, Vos temperature drift, input offset current Ios, Ios temperature drift, input bias current Ib, hoʻokomo impedance, hoʻokomo capacitance, walaʻau (ka leo uila hoʻokomo, ka leo o kēia manawa) Design gain thermal noise, power supply rejection ratio (PSRR), open-Cmo ratio rejection (PSRR), hāmama-Cmo ratio rejection (PSRR), maʻamau-Cmo hoʻolele ratio loaʻa-bandwidth huahana (GBW), slew rate (SR), hoʻokumu manawa, huina harmonic distortion.

ʻOiai he mea koʻikoʻi nā ʻāpana o nā amplifier hana i kahi ʻōnaehana e like me ke koho ʻana i nā photodiodes, ma muli o nā palena ākea, ʻaʻole e wehewehe ʻia nā wehewehe kikoʻī a me nā wehewehe. I ka hoʻolālā maoli o nā photodetectors, pono e loiloi ʻia ka mana o kēia mau ʻāpana i nā hewa ʻōnaehana. ʻOiai ʻaʻole hiki i nā ʻāpana āpau ke hopena nui i kāu mau koi o ka papahana, ma muli o nā hiʻohiʻona noiʻi maoli a me nā koi like ʻole, e loaʻa i nā ʻāpana i luna nā hopena like ʻole i nā hewa ʻōnaehana.

Nui nā ʻāpana no nā amplifier hana. No nā ʻano hōʻailona like ʻole, hiki ke kau ʻia nā ʻāpana nui e hoʻopiʻi ai i nā hewa systematic ma nā hōʻailona DC a me AC: DC variable signals Input offset voltage Vos, Vos temperature drift, input offset current Ios, input bias current Ib, impedance hoʻokomo, walaʻau (ka leo uila komo, ka leo o kēia manawa, ka hoʻolālā e loaʻa ka thermal noise), ka mana hoʻokaʻawale ʻana o ka mana (PSRR), hōʻole ka mana maʻamau (CMRR mode). Hōʻailona hoʻololi ʻokoʻa: Ma waho aʻe o nā ʻāpana i luna, pono e noʻonoʻo ʻia kēia mau mea: capacitance komo, loaʻa open-loop (AoL), huahana gain-bandwidth (GBW), slew rate (SR), ka manawa hoʻokumu, a me ka huina harmonic distortion.