Yuav ua li cas txiav txim siab yog hais tias dodes siv nyob rau hauv cov khoom siv sib txuas lus yog tsim nyog?

, Tus tub ntxhais lub luag haujlwm ntawm dises nyob rau hauv cov khoom siv sib txuas lus
Muaj ntau hom kev donges nyob rau hauv kev sib txuas lus cov khoom siv, xws li high- Kev Tiv Thaiv Kev Tshawb Fawb (ntau zaus} Kev Tiv Thaiv Ceev) Noj cov cim 5g pib ua piv txwv, lawv RF pem hauv ntej {{6} {{}}} Qhov kev sib tw qis capactractance diodes (<0.2pF) to achieve efficient switching in the millimeter wave frequency band; In optical communication systems, PIN photodiodes need to have a bandwidth response capability of over 10GHz to support high-speed optical signal conversion. These application scenarios impose strict requirements on the parameter accuracy of diodes, such as:
Lub sijhawm rov qab rov qab los ntawm kev hloov pauv diode yuav tsum tsawg dua 5ns
Cov Voltage rau pem hauv ntej poob ntawm schottky diodes yuav tsum tsawg dua lossis sib npaug rau 0.3V
Txoj kev sib tw ntawm cov li ntau yam yuav tsum tau them 800mHz-2.5GHz
2, cov txheej txheem ntsuas yooj yim
1. Cov qauv sib txuam sai sai
Cov kauj ruam ua haujlwm:
Teem lub ntau nplua mias rau Diode Test hom (feem ntau cim raws li "diode" lossis nrog cov cim diode)
Txuas cov kev sojntsuam liab rau lub anode thiab cov kev sojntsuam dub rau lub cathode, saib xyuas voltage rau pem hauv ntej:
Silicon Diode: 0.55-0.75v (Cov Khoom Sib Txuas Lus Qeb Ib Sim Ntawm 0.6-0.65V)
Schottky diode: 0.2-0.4V
German Diode: 0.2-0.3v (yeej tshem tawm hauv cov khoom sib txuas lus)
Sib Pauv Probes los ntsuas rov qab tiv thaiv, siab - cov khoom siv zoo yuav tsum tso saib "ol" (qhib Circuit Court)
Txhaum kev txiav txim siab cov qauv:
Positive voltage>0.8v: Tej zaum yuav qhia cov khoom siv laus lossis cov khoom tsis xws luag
Kev Tsim Khoom Siv Zoo<0.4V: There is a risk of breakdown
Reverse leakage current>1 μ a (ntsuas nrog lub siab {1} precision multimeter): tsis tau raws li qhov kev poob qis ntawm qib kev sib txuas lus
2. Precision Reaction Txoj Kev Ntsuas
Muaj Feem Cuam: Thaum qhov sib thooj tsis muaj Diode hom, hom kev tiv thaiv tuaj yeem siv rau kev txiav txim siab ua ntej
Cov Qauv Siv Ua Haujlwm:
Xaiv lub r × 1k iav (kom tsis txhob muaj kev puas tsuaj rau kev puas tsuaj vim tias siv cov iav tsis kam tiv dhau)
Ntsuas rau pem hauv ntej tiv:
Silicon Diode: 300 ω -3k ω
SCHOTTKY DIODE: 50 ω -500 ω
Ntsuas thim rov qab tiv thaiv:
High quality components should have a resistance of>500k Ω
Communication grade devices typically require>10M Ω
Sau ntawv:
Ua ntej ntsuas kev ntsuas, nws yog qhov tsim nyog los ua ib qho luv luv - Circuit Racuit Racuit Retet kev ua haujlwm ntawm kev sojntsuam
Tsis txhob muab cov ntiv tes kov cov hlau xaus ntawm ob qho kev sim ntawm tib lub sijhawm (tib neeg tsis kam cuam tshuam rau kev ntsuas qhov raug)
3. Oscilloscope dynamic kev tsom xam txoj kev
Cov nqi tseem ceeb: Tshawb xyuas cov hloov pauv ntawm cov diodes nyob rau hauv kev ua haujlwm tiag tiag
Kuaj Kev Teeb Pom Kev:
Tsim Circuit Court: Qhov chaw teeb tsa (yoj yoj (zaus=
Oscilloscope chaw:
Lub sij hawm hauv paus: 10ns / div (kho rau 1ns / div rau GHZ Qib Devices)
Ntsug nplai: 200MV / Div (saib xyuas cov hluav taws xob hluav taws xob zoo)
Hom Caj Dab: Ntug Caum
Cov Qauv Tsim Nyog:
Lub sijhawm nce (tr)<120% of the nominal value in the device specification book
Rov qab lub sijhawm rov qab (TRR)<5ns (for high-speed switch applications)
Kev Tsim Nyog Siab Tso Tawm Ntau Yam<± 5%
3, Tshwj Xeeb Hom Diode Nrhiav Tau Cov Tshuab
1. Zener Diode nrhiav tau
Kev Xeem Txuj:
Siv tus pointer multimeter nrog r × 10k ntau (muab 9V bias voltage)
Txuas cov kev sojntsuam dub rau lub Cathode thiab kev sojntsuam liab rau Anode
Nyeem tus nqi voltage yog lub ntsuas hluav taws xob ruaj khov (ib qho kev ua yuam kev ntawm ± 5% yog tsim nyog)
Kev Lag Luam Ntawv:
Ib qho kev sib txuas lus hluav taws xob sib txuas lus siv 1N4733a (5.1v voltage regulator tus nqi yuav tsum yog nyob nruab nrab ntawm 4.845-5.355v. Yog tias nws tshaj qhov ntau, cov cuab yeej xav tau hloov.
2. Ntau zog peev xwm DIODE nrhiav tau
Cov tsis tseem ceeb:
Xoom Bias Capacitor (CJ0): Yuav tsum ua raws li cov cuab yeej tshwj xeeb (tus nqi raug 10-200PF)
Tuning sensitivity (γ): needs to be>15 (qhia cov kev hloov pauv tseem ceeb hauv capacitance nrog voltage)
Cov Khoom Kuaj Xyuas:
LCR Tester (zaus teeb tsa rau 1mHz)
Kev tsis ncaj ncees (kho tau los ntawm 0-20v)
3. Photodriode Nrhiav tau
Lub Luag Haujlwm Kev Xeem:
Siv cov teeb meem teeb pom kev zoo (xws li 850nm LED, Tso zis zog 1MW)
Ntsuas luv - Circuit Court tam sim no (ISC):
Siab Zoo Pin Diode: 0.5-1.0 μ a / μ W
Apd Avalanche diode: 5-50 μ μ μ W (yuav tsum muaj cov kev tsis ncaj ncees siab)
4, Kev Ntsuas Tshwj Xeeb Tshwj Xeeb Rau Cov Khoom Sib Txuas Lus
1. Kev loj ua yam ntxwv muaj tseeb
Xeem Project:
Kev nqus dej hauv qab (IL):<0.5dB at rated frequency
Isolation: Reverse attenuation>40DB
Theem txuam yuam kev (rau kev sib npaug ntawm cov khub):<± 3 °
Cov Khoom Kuaj Xyuas:
Network Analyzer (Cov zaus ntau zaus yuav tsum tau npog cov kev ua haujlwm ntau pawg ntawm lub cuab yeej)
Kev ntsuas cov khoom siv hluav taws xob (ART Txuj)
2. Kub tus cwj pwm
Kev lag luam yuav tsum muaj:
Cov khoom sib txuas lus qib yuav tsum tau ua kom dhau qhov kub cycling kuaj los ntawm -40℃rau +85 degree
Ntsiab lus tseem ceeb Hloov Pauv:
Kev ua kom lub siab ua rau kub nyhav:<2mV/℃
Kub coefficient ntawm thim xau dej tam sim no:<2 times/10 ℃
3. Kev ntseeg tau tseeb
Kev ntsuam xyuas lub neej ntsuas nrawm
Kev kub siab rov qab Bias (HTRB): Thov 85% Ntsuas Rov Qab Voltage ntawm 125 Qib Rau 1000 teev
Lub zog ua voj voog: Ua 100000 hloov mus los ntawm rated tam sim no
5, Nrhiav kom tsis txhob muaj kev ua kom tsis txhob muaj kev daws teeb meem
1. Cov haujlwm tsis raug
Rov qab polarity ntawm cov kev sojntsuam: ua rau kev ntsuas qhov tsis txaus ntseeg (xws li thim rov qab ntawm cov conduction voltage)
UNCISCONSECTED Circuit Court ntsuas: Kev ua lus phem tshwm sim los ntawm cov khoom sib dhos
Kev tiv thaiv ESD tsis zoo: electrostatic tawg yog ib qho ntawm cov ua rau cov khoom lag luam qib sib txuas lus tsis ua haujlwm
2. Tshuaj
Siv peb lub davhlau ya ua haujlwm ntsuas (xws li kehthththty (xws li tus lej 16048g)
Ua 100 ω Kev Tawm Tshem Tawm Tshem Tawm ntawm lub cuab yeej ua ntej kev sim
Siv cov anti - zoo li qub workbench (saum npoo tiv thaiv 106-109 ω)