Dab tsi yog lub luag haujlwm ntawm diodes hauv cov teeb liab txias ntawm cov cuab yeej kho mob sensors?

1, Photodiode: "tus neeg txhais lus kho qhov muag" rau kev saib xyuas cov cim tseem ceeb
Photodiodes hloov cov teeb liab kho qhov muag rau hauv cov teeb liab hluav taws xob los ntawm cov nyhuv photoelectric ntawm PN junctions, thiab tau siv dav hauv cov khoom siv kho mob rau kev saib xyuas cov ntshav oxygen saturation, pulse yoj nrhiav, endoscopic imaging, thiab lwm yam xwm txheej. Nws cov txiaj ntsig tseem ceeb tau tshwm sim hauv peb yam:

Siab rhiab heev spectral teb
Noj silicon-raws li photodiodes ua piv txwv, lawv muaj cov kab lus teb cov yam ntxwv nyob rau hauv lub wavelength ntawm 400-1100nm, npog raws nraim hemoglobin absorption ncov (940nm) thiab oxygenated hemoglobin absorption ncov (660nm). Los ntawm dual wavelength detection technology, ntshav oxygen saturation (SpO ₂) tuaj yeem raug suav nrog qhov yuam kev tswj tsis pub dhau ± 2%. Ib lub npe ntawm cov oximeter portable siv tus PIN hom photodiodes, uas tuaj yeem tswj tau cov lus teb ntawm 0.1 μ A / lux nyob rau hauv cov teeb pom kev tsis zoo, kom ntseeg tau qhov tseeb ntawm kev saib xyuas hmo ntuj.
Rapid dynamic teb muaj peev xwm
Hauv kev ntsuas pulse nthwv dej, photodiodes yuav tsum tau ntes cov kev hloov pauv hauv millisecond hauv cov cim qhia lub plawv. Avalanche photodiodes (APDs) ua kom luv lub sij hawm teb rau nanoseconds los ntawm sab hauv avalanche multiplication nyhuv, thiab nrog kev pab los ntawm ib tug transimpedance amplifier Circuit Court, yuav kom meej meej reproduce lub nce ntug thiab cov yam ntxwv ntawm pulse tsis thiab hnyav mem tes nthwv dej. Ib qho kev ntsuas ntshav siab dynamic siv APD array kom ua tiav waveform distortion dawb tau txais ntawm tus nqi piv txwv ntawm 200Hz.
Anti cuam tshuam kev tsim qauv
Lub teeb fluorescent thiab LED teeb qhov chaw hauv qhov chaw kho mob tuaj yeem tsim 50Hz fais fab zaus cuam tshuam. Los ntawm kev sib koom ua ke cov ntxaij lim dej kho qhov muag nyob rau hauv pob photodiode, tsis yog lub hom phiaj wavelength optical signals tuaj yeem cuam tshuam zoo. Ib hom kev kho mob endoscope siv ntau- txheej txheej tshuab, uas ua rau kom pom lub teeb xa mus rau 95% thaum tiv thaiv infrared cuam tshuam rau qis dua -40dB.
2, Zener diode: "kev nyab xeeb valve" ntawm kev kho mob fais fab mov
Cov cuab yeej kho mob muaj cov kev cai nruj rau lub zog ruaj khov. Lub precision voltage regulator Circuit Court tsim los ntawm qhov rov qab tawg yam ntxwv ntawm qhov voltage regulator diode plays lub luag haujlwm tseem ceeb hauv cov xwm txheej hauv qab no:

Lithium roj teeb tiv thaiv qhov system
Thaum cov khoom siv kho mob portable xws li defibrillators thiab portable ultrasound yog siv los ntawm lithium roj teeb, nws yog ib qho tsim nyog los tiv thaiv cov roj teeb puas los ntawm overcharging / overdischarging. Lub MMSZ5231B series voltage regulator diode, nrog cov kev cai voltage meej ntawm 3.3V ± 0.05V thiab them nyiaj tswj nti, tswj cov roj teeb voltage hloov hauv ± 0.1%. Tom qab siv qhov kev daws teeb meem no, lub roj teeb lub neej ntawm ib yam khoom siv AED tau txuas ntxiv mus rau ntau dua 2000 zaug.
High precision analog circuit fais fab mov
Hauv cov khoom siv xws li electrocardiographs thiab electroencephalographs, analog pem hauv ntej -kawg circuits yog rhiab heev rau lub hwj chim mov suab nrov. BZX85C series low-noise voltage regulator siv qhov kub coefficient tswj technology ntawm 0.01 μ A/degree txhawm rau txo hwj chim ripple mus rau qis dua 50 μ V nyob rau hauv qhov kev ua hauj lwm ntawm -20℃rau +85℃, kom ntseeg tau lub teeb liab -to-suab nrov piv (SNR) ntawm 0.
Tsim kev kho mob qib cais fais fab mov
Nyob rau hauv muaj zog electromagnetic cuam tshuam ib puag ncig xws li chav ua hauj lwm, qhov tso zis davhlau ya nyob twg ntawm kev rho tawm transformer yuav tsum tau nruab nrog ib tug clamp Circuit Court tsim los ntawm ib tug voltage regulator diode. Ib qho kev kho mob cais hluav taws xob siv hluav taws xob bidirectional voltage regulator diode array kom txwv tsis pub muaj kev cuam tshuam ntau yam nyob rau hauv ± 60V, ua tau raws li cov kev cai ntawm IEC 60601-1 kev kho mob hluav taws xob kev nyab xeeb tus qauv.
3, Kev siv lub tswv yim tshiab hauv Kev Siv Hluav Taws Xob Hluav Taws Xob Hluav Taws Xob
Limiting tiv thaiv Circuit Court
Nyob rau hauv lub ultrasonic sojntsuam tsav Circuit Court, lub 1N4148 siab - ceev hloov diode tsim ib tug bidirectional limiting network, uas clamps lub transient overvoltage nyob rau hauv ± 5.7V los tiv thaiv lub piezoelectric ceramic transducer los ntawm pulse cuam tshuam. Tom qab siv qhov kev daws teeb meem no, qhov kev sojntsuam tsis ua haujlwm ntawm cov khoom siv hluav taws xob ultrasound txo qis los ntawm 80%.
Logarithmic amplification Circuit Court
Nyob rau hauv lub fluorescence immunoassay analyzer, cov zis teeb liab ntawm lub photodiode yog logarithmically muaj feem xyuam rau cov fluorescence siv. Lub logarithmic amplifier tsim nrog BAS70 Schottky diode txuas lub zog ntau mus rau 10 ⁶, ua tiav pg / mL qib kev tshawb nrhiav tshuaj. Tom qab siv cov thev naus laus zis no, kev tshawb pom qhov txwv ntawm qee hom chemiluminescence ntes tau tshaj 0.1 pg / mL.
Kub them nyiaj network
Nyob rau hauv lub ntsuas kub infrared, lub thermistor thiab 1N4728A hom hluav taws xob tswj hluav taws xob diode tsim qhov kub thiab txias Circuit Court, uas tshem tawm qhov cuam tshuam ntawm qhov kub thiab txias ntawm lub ntsuas hluav taws xob los ntawm cov yam ntxwv tsis muaj kab. Tom qab siv cov tswv yim no, qee yam pob ntseg kub phom tuaj yeem tswj qhov ntsuas qhov yuam kev hauv ± 0.2℃ntawm qhov ntsuas kub ntawm 10℃-40 degree.