Core Challenges of Radiation-Hardened Crystal Oscillators: Kuwunika -kuya mwakuya kwa Total Ionizing Dose ndi Single-Zochitika Zachitika
Mwachidule: Zovuta Zapadera Zama Crystal Oscillators M'malo Otentha
Ma Crystal oscillator, omwe amagwira ntchito ngati "kugunda kwa mtima" kwa makina amagetsi, amakumana ndi zovuta zapadera -malo owunikira kwambiri. Magawo ake apakati-makristalo a piezoelectric ndi ma oscillation olondola kwambiri-amayankha mosiyanasiyana ku radiation, koma zotsatira zake zimawonekera mumetric yofunikira kwambiri: kukhazikika kwafupipafupi. Zotsatira za radiation zimagawidwa m'magulu awiri: kuwonongeka kwapang'onopang'ono kwa Total Ionizing Dose (TID) zotsatira ndi zolakwika zadzidzidzi zomwe zimachitika chifukwa cha Single-Event Effects (SEEs).
Gawo I: Zotsatira Zonse za Mlingo wa Ionizing-"Kukalamba Kwambiri" kwa Crystal Oscillators
1.1 Kuwonongeka Kwambiri kwa Crystal Iyokha
Zotsatira za TID zimabwera chifukwa cha kuchuluka kwa mphamvu chifukwa cha-kukhudzana ndi cheza kwa nthawi yayitali, zomwe zimayambitsa mitundu iwiri ya kuwonongeka kwa makristalo a quartz:
Kupanga Pang'onopang'ono kwa Lattice Defects
• Ma radiation amapangitsa kuwonongeka kosasunthika mkati mwa kristalo, kutulutsa ma atomu pamalo awo.
• Ntchito, ma atomu apakati, ndi zolakwika zina zimawunjikana pakapita nthawi.
• Zowonongekazi zimasintha kusinthasintha kwa kristalo ndi kuchuluka-kuchuluka kwake.
• Kukhudza kwachindunji: Kusintha kwadongosolo kwa ma frequency a resonant ndi kupotoza kwafupipafupi-kupindika kwa kutentha.
Kuwonjezeka kwa Malipiro pa Surfaces ndi Interfaces
• Ma radiation a ionizing amapanga ndalama zokhazikika pamtunda wa kristalo ndi ma elekitirodi.
• Kuchulukirachulukira kumasintha malire am'malire a kufalikira kwa mafunde.
• Kuchulukitsa kutayika kwa kufalitsa ndi kubalalitsa kwa mafunde omvera.
• Kukhudza mwachindunji: Kutsika kwa khalidwe labwino (Q) ndi kuwonongeka kwa gawo la phokoso la gawo.
1.2 Kuwonongeka Kwapang'onopang'ono kwa Madera Oscillation
Zigawo zogwira ntchito komanso zopanda pake m'mabwalo a oscillation zimatsika pomwe mlingo wa radiation umachulukana:
Parameter Drift mu Active Devices
• Kusuntha kwadongosolo mu ma voltages a MOSFET kumasintha chigawo cha oscillation.
• Kuchepa kwa transistor transconductance kumachepetsa kuchulukitsa kwa loop.
• Kukhudza kwachindunji: Kuvuta poyambira kugwedezeka, kuchepetsedwa kwa matalikidwe a matalikidwe, ndipo muzovuta kwambiri, kutha kwa oscillation.
Kuwonjezeka Kwambiri kwa Kutayikira Panopa
• Kuchulukirachulukira kwa ma oxide kumabweretsa kuchucha kwamadzi mumagulu a PN ndi ma oxide a zipata.
• Kukwera kwakukulu kwa kugwiritsa ntchito mphamvu zokhazikika.
• Phokoso lowonjezereka la matenthedwe limakweza phokoso la gawo.
• Kukhudza kwachindunji: Kugwiritsa ntchito mphamvu kumaposa zomwe zimatchulidwa, ndipo phokoso loyambira limakwera.
Kusintha kwa Feedback Network Parameters
• Ma radiation-zigawo zomveka bwino za ma capacitor a load ndi resistors akusintha.
• Kusintha magawo kusintha zinthu zofunika oscillation.
• Kukhudza kwachindunji: Kusintha pakati pamafupipafupi ndi kutsika kwa machunidwe osiyanasiyana.
Gawo II: Single-Zochitika Zachitika-"Sudden Heart Attack" ya Crystal Oscillators
2.1 Direct Impact pa Crystal Unit
Kuwonongeka Kwakanthawi kochepa
• Tinthu tating'onoting'ono tating'ono-pa mphamvu (monga heavy ion kapena -proton yamphamvu kwambiri) imadutsa mu crystal.
• Amapanga zowonongeka za latisi m'mbali mwa tinthu tating'onoting'ono.
• Zimayambitsa kusinthasintha kwakanthawi kochepa komweko.
• Kugunda kwachindunji: Kudumpha pafupipafupi, komwe kumatha kuchira pambuyo pake.
Malipiro Deposition Zotsatira
• Tinthu timayika ndalama mkati mwa kristalo, ndikupanga magawo amagetsi osakhalitsa.
• Kulipiritsa kumasinthidwa kukhala kupsinjika kwakanthawi kwamakina pogwiritsa ntchito mphamvu ya piezoelectric.
• Kukhudza kwachindunji: Kudumpha pang'onopang'ono ndi kutsika kwambiri-kuchepa kwafupipafupi kwa kukhazikika kwafupipafupi.
2.2 Kusokonezeka Kwapomwepo kwa Maulendo Ozungulira
Imodzi-Zosintha Zachitika (SETs) mu Maulendo a Analogi
• -tinthu tating'onoting'ono timene timatulutsa mphamvu timagunda zokulirakulira kapena ma bias circuits mu oscillator core.
• Pangani ma pulse osakhalitsa pamagetsi kapena mizere yama siginecha.
• Kuthamanga kwapakati kumayambira makumi a picoseconds mpaka ma microseconds angapo.
• Kukhudza mwachindunji:
• Nthawi yomweyo glitches superimposed pa linanena bungwe waveform.
• Kusokonezeka kwadzidzidzi kwa kupitiriza kwa gawo.
• Zitha kuchititsa gawo-lolo lotsekeka (PLLs) kutaya loko kapena kulunzanitsa koloko kulephera.
Single-Zosokoneza Zochitika (SEUs) mu Control Logic
• Kutembenuza pang'ono kumachitika m'magawo owongolera digito (monga ma regista pafupipafupi, mawu owongolera).
• Zosintha zosintha zimasinthidwa mosadziwa.
• Kukhudza mwachindunji:
• Kuchulukirachulukira kukufika pamtengo wolakwika.
• Kusintha kwachilendo kwa machitidwe ogwiritsira ntchito.
• Zingafunike kukonzanso kuti mubwezeretse ntchito yabwinobwino.
Zotsatira Zangozi Zake Yemwe Ali Mmodzi-Latch Latch{1}}mmwamba (SEL)
• Kuyambitsa ma parasitic PNPN kumapanga njira yapamwamba{{0}panopa.
• Kuchulukirachulukira kwakanthawi (kutheka mpaka 100 kuchuluka kwanthawi zonse).
• Kukhudza mwachindunji:
• Kulephera kwathunthu kwa ntchito ya dera.
• Kuthamanga kwa kutentha kumatha kuwononga kosatha.
• Pamafunika kupalasa njinga mphamvu kuti achire.
Gawo III: Njira Zapadera Zowumitsa Ma Crystal Oscillators
3.1 Njira Zachindunji Zotsutsana ndi Zotsatira za TID
Kusankha Kokometsedwa kwa Zida za Crystal
• Gwiritsani ntchito ma radiation-hardened crystals: SC-cut quartz imasonyeza bwino kupirira ma radiation kuposa AT-cut.
• Njira zapadera zopangira: Kutsekemera kwa haidrojeni kumachepetsa kuwonongeka kwa kristalo koyambirira.
• Kuwunika kwa zida zatsopano: Njira zina monga lithium niobate (LNB) zimawonetsa kulonjeza mumagulu ena a frequency.
Mapangidwe Ozungulira Olimba
• Gwiritsani ntchito zida za semiconductor zopangidwa ndi ma radiation-njira zolimba.
• Kupanga mabwalo okondera osagwiritsidwa ntchito kuti athe kubweza basi kukwera kwa voltage.
• Gwirani ntchito zololera kuti zitsimikizire kuti zimagwira ntchito mkati mwa magawo osunthika.
• Phatikizani zowunikira zomwe zatuluka komanso zolipirira.
Kukhathamiritsa Kwamapangidwe
• Konzani kaphatikizidwe ka kristalo kuti muchepetse kugwiritsa ntchito ma radiation-zinthu zovutirapo.
• Kupititsa patsogolo mapangidwe a electrode ndi njira zolumikizirana kuti muchepetse kuchuluka kwa mawonekedwe.
• Ikani zokutira zapadera kuti muchepetse zotsatira za pamwamba.
3.2 Mayankho achindunji a Omwe Ali Mmodzi-Zotsatira za Zochitika
Circuit Architecture-Level Protection
• Gwiritsani ntchito masefa ndi ma hysteresis mabwalo mumayendedwe ovuta a ma analogi.
• Kukhazikitsa triple modular redundancy (TMR) ndi refresh periodic for section control digital.
• Kupanga njira zodziwira mwamsanga ndi kuchira.
• Tetezani masanjidwe ndi kuzindikira zolakwika ndi ma code okonza.
Kukonzekera Kwamapangidwe
• Onjezani mphete zolondera m'malo omvera.
• Gwiritsani ntchito-masanjidwe a centroid kuti muchepetse kukwera.
• Konzani maukonde ogawa mphamvu kuti muchepetse kuvutikira kwa latch{0}}.
• Wonjezerani kukula kwa ma transistors ofunikira kuti mukweze mtengo wofunikira.
Kachitidwe-Ma Level Countermeasures
• Lingalirani zomanga zambiri-zothandizira ma oscillator ochiritsira-kusintha.
• Yambitsani-kuyang'anira nthawi yeniyeni ndi kuzindikira modabwitsa.
• Pangani ma aligorivimu osinthika kuti muzindikire ndikulipira zotsatira zosakhalitsa.
• Khazikitsani-njira zokonzetsera kanjira, kuphatikizira kukonzanso magawo ndi kubwezeretsanso zolakwika.
3.3 Zofunikira Zapadera Zoyezetsa ndi Kutsimikizira
Njira Zoyesera Ma radiation a Crystal Oscillators
• Kuyang'anira-kwanthawi yayitali kukhazikika kwanthawi yayitali kuti awone zomwe zikuchitika pansi pa TID.
• Yeniyeni-muyeso wa nthawi yeniyeni ya phokoso kuti muwone siginecha ya zotsatira zosakhalitsa.
• Mu-kuyesa kwa milingo kuti muyerekezere kukhudzika kwa chochitika chimodzi-chimodzi.
• Kuyesedwa kofulumira kuti muneneretu kudalirika-kwanthawi yayitali.
Zofunikira Zoyeserera
• Ubale umakhota pakati pa pafupipafupi kuchepetsa ndi mlingo wonse.
• Kusintha kwa chigawo cha phokoso.
• Kuwonongeka kwa nthawi yoyambira-ndi nthawi yokhazikika.
• Kukhoza kusunga linanena bungwe waveform umphumphu.
Kutsiliza: Njira Yaumisiri Wama Systems Kuti Mukhale Woyenera ndi Kukhathamiritsa
Kuwotcha kwa ma radiation a crystal oscillator ndizovuta zamakina zamakina zomwe zimafunikira kusinthanitsa-kuchotsera pamiyezo ingapo:
Kuyanjanitsa Zida ndi Njira
• Kusinthanitsa-kusiyana pakati pa kuwala kwa kristalo ndi kukhazikika kwa ma frequency.
• Kulinganiza kuchuluka kwa njira ya semiconductor kuuma motsutsana ndi kugwiritsa ntchito mphamvu ndi liwiro.
Malonda- mu Circuit Design
• Kudalirika kupindula kuchokera ku redundancy motsutsana ndi kuchuluka kwa zovuta ndi kugwiritsa ntchito mphamvu.
• Kulinganiza mphamvu ya njira zodzitetezera ku zovuta za mtengo ndi kukula kwake.
Kukonzekera kwa System Architecture
• Mapangidwe ogwirizana a masikimu-ambiri achitetezo.
• Kuphatikiza kwa hardware{{0}software fault-njira zololera.
• Kuphatikizika kwa kuyang'anira pa intaneti ndi kuthekera kosintha kusintha.
Pamapeto pake, ma radiation opambana{{0}mapangidwe olimba a oscillator amafunikira kumvetsetsa bwino malo ogwiritsira ntchito komanso kuganizira mozama momwe amagwirira ntchito, kudalirika, ndi mtengo wake. Ndi kupita patsogolo kwa zinthu zatsopano, njira, ndi njira zolipirira zanzeru, kagwiridwe kake ka ma crystal oscillator m'malo otenthetsera ma radiation apitilire kupita patsogolo, ndikupereka nthawi yolimba-maziko odalirika{3}}odalirika kwambiri monga kufufuza mumlengalenga mozama ndi mphamvu ya nyukiliya.
Kusanthula kwachindunji ndi njira yowumitsayi kumatsimikizira kuti "kugunda kwa mtima" kwa dongosololi kumakhalabe kokhazikika komanso kodalirika, ngakhale m'malo ovuta kwambiri.