Yuav siv cov diodes li cas los txhim kho kev ua tau zoo nyob rau hauv qis -cov khoom siv kho mob muaj zog?

1, Circuit Court topology reconstruction: tshem tawm qhov poob ntawm diodes
Cov diodes ib txwm muaj qhov poob qis qis (xws li 0.5-0.7V rau cov raj silicon), uas txo qis kev ua haujlwm ntawm cov hluav taws xob kho mob tsawg. Noj ib qho implantable neural stimulator ua piv txwv, nws DC-DC converter xav tau boost lub 3.7V lithium roj teeb voltage rau 15V. Yog hais tias Schottky diode rectification yog siv, qhov conduction poob nyiaj txog li 35%. Los ntawm kev qhia synchronous rectification thev naus laus zis thiab hloov diodes nrog MOSFETs, qhov kev tiv thaiv tuaj yeem raug txo los ntawm ntau pua milliohms mus rau qis dua 10m Ω, uas ua rau muaj kev txhim kho kev ua haujlwm ntawm ntau dua 20%.

Cov xwm txheej: Ib hom ntawm dynamic electrocardiograph siv lub LTC4412 zoo tagnrho diode maub los tsav lub MOSFET array sib npaug, ua tiav tsis siv neeg hloov khoom siv hluav taws xob ob. Ntawm 12V input, lub conduction voltage poob ntawm ib txwm diodes yog txo los ntawm 0.3V mus rau 10mV, lub zog noj yog txo los ntawm 96%, thiab lub endurance ntawm lub ntaus ntawv yog ncua los ntawm 6 teev mus rau 24 teev, raws li cov kev xav tau ntawm kev soj ntsuam tas li.

2, Kev xaiv ntaus ntawv: cov kev txwv tsis sib xws nrog cov xwm txheej kho mob
Cov cuab yeej kho mob muaj cov cai nruj rau qhov tseem ceeb ntawm cov diodes, thiab kev xaiv sib txawv yuav tsum tau ua raws li daim ntawv thov scenario

Tsawg pem hauv ntej voltage poob (VF)
Hauv cov cuab yeej tshawb nrhiav microcurrent xws li ntshav ntsuas ntshav, lub diode VF cuam tshuam ncaj qha rau lub teeb liab amplitude. Hloov cov tsoos silicon diodes (VF=0.6V) nrog germanium raws li Schottky diodes (VF=0.15V) tuaj yeem ua rau kom pom qhov rhiab heev los ntawm peb zaug thaum txo kev siv hluav taws xob los ntawm 40%.
Ultra ceev rov qab lub sij hawm (Trr)
Hauv digital X-ray imaging systems, photodiode array yuav tsum ua kom tiav cov teeb liab tau los ntawm 1 μs. Xaiv ib qho ultrafast rov qab diode nrog Trr<50ns can avoid image tailing caused by charge residue and improve the signal-to-noise ratio (SNR) by 12dB.
Tsawg leakage tam sim no (IR)
Hauv cov khoom siv ECG uas siv tau, diode to tam sim no tuaj yeem ua kom paub qhov kev sib tw hauv qab. BAS70 ultra-tsis tshua muaj hluav taws xob tam sim no diode (IR=0.1pA) ntim hauv SOD-123 tuaj yeem ua kom zoo dua cov teeb liab-rau-nruj piv (SNR) rau 85dB, ua tau raws li qib kev kho mob kom raug.
High breakdown voltage (BV)
Hauv siab - cov khoom siv hluav taws xob xws li defibrillators, diodes yuav tsum tiv taus 5kV pulses. Los ntawm kev siv SiC (silicon carbide) diodes (BV=6.5kV), tus nqi rov qab (Qrr) raug txo los ntawm 80% piv rau silicon diodes, uas tuaj yeem txo qhov cuam tshuam ntawm electromagnetic cuam tshuam (EMI).
3, Dynamic zog tswj: ntse tswj tau txais kev thov
Cov cuab yeej kho mob yuav tsum tau hloov kho lub zog ntawm diode raws li lawv txoj haujlwm ua haujlwm, thiab cov tswv yim zoo xws li:

Segmented fais fab mov tswj
Hauv pulse oximeters, photodiode tsuas yog qhib thaum lub sijhawm ua piv txwv. Los ntawm kev tswj cov MOSFET hloov los ntawm MCU, tag nrho lub zog ua haujlwm tau ua tiav thaum lub sijhawm ua piv txwv (100 μs), thiab ua tiav lub zog - tawm yog ua tiav thaum lub sijhawm so (99.9%), txo qhov nruab nrab lub zog siv ntawm lub cev mus rau 0.3mW.
Adaptive Bias Technology
Nyob rau hauv implantable hlwb computer interfaces, qhov tsis ncaj voltage ntawm APD (avalanche photodiode) yuav tsum tau dynamically hloov nrog qhov siv ntawm lub teeb. Siv LTC6268 qis- suab nrov ua haujlwm amplifier los tsim lub voj voog tawm tswv yim, APD nce stabilized ntawm 100 zaug, thaum lub zog siv hluav taws xob tsis zoo raug txo los ntawm 5mW mus rau 0.8mW.
Pw tsaug zog hom optimization
Hauv cov ntsuas kub digital, LTC2450-1 Δ - ∑ ADC txuas ncaj qha mus rau lub thermistor, thiab nws cov pw tsaug zog tam sim no tsuas yog 0.5 μ A. Koom tes nrog MOSFET hloov mus txiav tawm lub zog diode, kom lub zog standby ntawm tag nrho lub tshuab yog tsawg dua 1 μ W, ua tau raws li 102-xyoos 3 lub roj teeb.
4, Tshwj xeeb optimization xyaum nyob rau hauv kev kho mob scenarios
Kev soj ntsuam cov ntshav qabzib tsis muaj kev cuam tshuam
Siv 1310nm / 1550nm dual wavelength laser diodes thiab InGaAs photodiode arrays, synchronous sampling tiav los ntawm LTC2366-18 ntsis SAR ADC. Optimize lub diode tsav Circuit Court kom luv lub laser mem tes dav ntawm 100ns mus rau 20ns, txo lub zog siv zog los ntawm 60%, thiab txhim kho cov piam thaj concentration nrhiav kom raug rau ± 5mg / dL.
Portable ultrasound kuaj mob
Hauv kev sojntsuam ultrasound, lub high voltage multiplication Circuit Court yog tsim los siv SiC Schottky diodes los txhawb 12V input rau 100V. Los ntawm kev ua kom zoo ntawm PCB layout kom txo cov kab mob parasitic inductance, lub diode thim rov qab poob yog txo los ntawm 75%, kev sojntsuam lub taub hau kub yog txo los ntawm 40%, thiab cov duab daws teeb meem tau txhim kho rau 256 kab.
capsule endoscopy
Nyob rau hauv 0.3cm ³ miniaturization tsim, BAT54 series diode array ntim hauv TSOT-23 yog siv los ua kom muaj zog sib cais ntawm CMOS duab sensor thiab wireless kis module. Los ntawm kev siv 3D stacking thev naus laus zis los ua kom luv luv ntawm kev sib cuam tshuam, lub teeb liab kev ntseeg siab (SI) tau ua kom zoo rau -40dB qhov poob, thiab cov duab xa mus txog 2Mbps.