Core Challenges of Radiation-Hardened Crystal Oscillator: Tlhahlobo e tebileng- ea Total Ionizing Dose le Single Effects-Ketsahalo
Kakaretso: Mathata a Ikhethileng a Crystal Oscillator tikolohong ea Mahlaseli
Crystal oscillator, e sebetsang e le "ho otla ha pelo" ea lisebelisoa tsa elektroniki, li tobane le mathata a ikhethang libakeng tse phahameng- tsa mahlaseli. Likarolo tsa tsona tsa mantlha-likristale tsa piezoelectric le li-circuits tsa oscillation tse nepahetseng-li arabela mahlaseling ka tsela e fapaneng, empa litlamorao li bonahala ho metric ea bohlokoa ea ts'ebetso: botsitso ba maqhubu. Litlamorao tsa mahlaseli li arotsoe ka mefuta e 'meli: ho fokotseha butle-butle ha litlamorao tsa Total Ionizing Dose (TID) le liphoso tsa tšohanyetso tse bakoang ke Single{5}}Event Effects (SEEs).
Karolo ea I: Kakaretso ea Liphello tsa Ionizing Dose-"Botsofali bo sa Feleng" ba Crystal Oscillators
1.1 Tšenyo e Kenyellelitsoeng ho Crystal ka boeona
Litlamorao tsa TID li bakoa ke ho bokellana ha matla ka lebaka la-nako e telele ea ho pepesehela mahlaseli a ionizing, ho bakang tšenyo ea mefuta e 'meli ea likristale tsa quartz:
Tlhahiso e Tsoelang Pele ea Mefokolo ea Lattice
• Radiation e baka tšenyo ea ho falla ka har'a kristale, e ntša liathomo sebakeng sa tsona sa lattice.
• Likheo, liathomo tsa interstitial, le liphoso tse ling lia bokellana ha nako e ntse e ea.
• Litšitiso tsena li fetola mats'oafo a kristale le matla a -a ho kenya.
• Tšusumetso e tobileng: Liphetoho tse hlophisitsoeng tsa maqhubu a resonant le ho khopamisoa ha maqhubu-a mofuta oa curve ea mocheso.
Ho bokellana ha Tefiso libakeng tse ka holimo le ka li-interfaces
• Mahlaseli a ionizing a hlahisa litefiso tse tsitsitseng sebakeng sa kristale le li-electrode interfaces.
• Ho bokella litefiso ho fetola maemo a moeli bakeng sa phatlalatso ea maqhubu a acoustic.
• E eketsa tahlehelo ea ho ata le ho hasana ha maqhubu a acoustic.
• Tšusumetso e tobileng: Ho fokotseha ha ntlha ea boleng (Q) le ho senyeha ha karolo ea ts'ebetso ea lerata.
1.2 Ho Fokotseha Butle-butle ha Lipotoloho tsa Oscillation
Likarolo tse sebetsang le tse sa sebetseng lipotolohong tsa oscillation lia senyeha ha lethal dose la radiation le ntse le bokellana:
Parameter Drift ho Lisebelisoa tse sebetsang
• Ho hoholeha ka mokhoa o hlophisehileng ho li-voltage tsa MOSFET ho fetola ntlha ea tšekamelo ea li-circuits tsa oscillation.
• Ho fokotseha ha transistor transconductance ho fokotsa loop gain margin.
• Tšusumetso e tobileng: Bothata ba ho qala oscillation, attenuation of output amplitude, le maemong a boima, ho khaotsa ho oscillation.
Keketseho ea Phatlalatso ea Leakage Hajoale
• Litefiso tsa sefi sa oksijene li lebisa ho phallo e ntseng e eketseha ea ho lutla ha likhohlano tsa PN le liheke tsa oxides.
• Ho phahama ho hoholo ha tšebeliso ea matla a tsitsitseng.
• Lerata le ntseng le eketseha la mocheso le phahamisa mokatong oa lerata.
• Tšusumetso e tobileng: Tšebeliso ea matla e feta litekanyetso, 'me lerata la motheo lea phahama.
Liphetoho ho Feedback Network Parameters
• Radiation{0}}paramethara e hlokolosi ea li-capacitor tsa load le resistors lia fetoha.
• Ho fetola maemo a hlokahalang bakeng sa ho sisinyeha.
• Tšusumetso e tobileng: Liphetoho tsa maqhubu a bohareng le ho fokotseha ha sebaka sa tokiso.
Karolo ea II: Liphello Tse Leng-Ketsahalo- "Sdden Heart Attack" ea Crystal Oscillators
2.1 Tšusumetso e Otlolohileng ho Yuniti ea Crystal
Tšenyo ea Phallo ea Nakoana
• Karolo e le 'ngoe e phahameng-ea matla (mohlala, ion e boima kapa{3}}proton e phahameng) e feta ka har'a kristale.
• E etsa tšenyo ea sebaka sa marang-rang haufi le tselana ea karoloana.
• E baka phapang ea nakoana ea khatello ea kelello sebakeng seo.
• Tšusumetso e tobileng: Ho tlola hanghang hanghang, hoo ho ka 'nang ha fola ka mor'a moo.
Tefiso Deposition Effects
• Chelete ea depositi ka har'a kristale, e theha masimo a motlakase a nakoana.
• Tefiso e fetoloa khatello ea mechine ea nakoana ka phello ea piezoelectric.
• Tšusumetso e tobileng: Ho tlola le ho fokotseha ho hoholo ha nako e khuts'oanyane- ea botsitso ba khafetsa.
2.2 Tšitiso ea Hang-hang ea Lipotoloho tsa Oscillation
E le Mong-Ketsahalo e Fetang (li-SETs) ho Lipotoloho tsa Analog
• Likarolo tse phahameng-li otla li-amplifiers kapa bias circuits ho core ea oscillator.
• Hlahisa li-pulse tsa hona joale tsa nakoana ho matla kapa lithapo tsa lipontšo.
• Pulse widths ho tloha ho mashome a picoseconds ho ea ho microseconds tse 'maloa.
• Tšusumetso e tobileng:
• Hang-hang glitches superimposed holim'a tlhahiso waveform.
• Khatiso ea tšohanyetso ea tsoelo-pele ea mohato.
• E ka etsa hore phase{0}}locked loops (PLLs) e lahleheloe ke khokahano ea senotlolo kapa oache e hlolehe.
-Ketsahalo e le 'Ngoe (SEUs) ho Control Logic
• Li-bit flips li etsahala likarolong tsa taolo ea dijithale (mohlala, rejistara ea tokiso ea khafetsa, mantsoe a taolo ea mokhoa).
• Litlhophiso tsa tlhophiso li fetotsoe ka mokhoa o sa lebelloang.
• Tšusumetso e tobileng:
• Leqhubu la tlhahiso le tlolela boleng bo fosahetseng.
• Ho fetoha ho sa tloaelehang ha mekhoa ea ho sebetsa.
• Ho ka nna ha hloka tlhophiso hape ho busetsa tshebetso e tlwaelehileng.
Litlamorao tse Koluoang tsa Batho ba le Mong-Ketsahalo ea Latch{1}up (SEL)
• Ho qala ha meaho ea likokoana-hloko tsa PNPN ho theha tsela e phahameng{{0}ea hona joale.
• Keketseho ea hona joale haholo (mohlomong e ka ba makhetlo a 100 ho feta boleng bo tloaelehileng).
• Tšusumetso e tobileng:
• Ho hlōleha ho feletseng ha mosebetsi oa potoloho.
• Ho baleha ha mocheso ho ka baka tšenyo e sa feleng.
• E hloka ho palama baesekele ho fola.
Karolo ea Boraro: Mekhoa e Khethehileng ea ho thatafatsa bakeng sa Crystal Oscillators
3.1 Mehato e Khethehileng Khahlanong le Liphello tsa TID
Khetho e ntlafalitsoeng ea Lisebelisoa tsa Crystal
• Sebelisa mahlaseli-likristale tse thatafetseng: SC-cut quartz e bonts'a mahlaseli a kotsi ho feta AT-cut.
• Mekhoa e khethehileng ea ho sebetsa: Ho kenngoa ha hydrogen ho fokotsa mefokolo ea pele ea kristale.
• Patlisiso ea lisebelisoa tse ncha: Mekhoa e meng e kang lithium niobate (LNB) e bontša ts'episo lihlopheng tse itseng tsa maqhubu.
Moralo o thata oa potoloho
• Sebelisa lisebelisoa tsa semiconductor tse entsoeng ka mahlaseli-mekhoa e thatafalitsoeng.
• Rala li-circuits tse se nang leeme hore li lefelle ka bobona bakeng sa khoholeho ea motlakase.
• Sebetsa moralo oa mamello ho etsa bonnete ba hore ts'ebetso e sebetsa ka har'a mekhahlelo ea li-parameter.
• Kopanya li-circuits tsa ho lebela le mats'eliso a nako ea ho lutla.
Ntlafatso ea Sebopeho
• Ntlafatsa phuthelo ya kristale ho fokotsa tshebediso ya-masebediswa a hlabang mahlaseli.
• Ntlafatsa moralo oa li-electrode le mekhoa ea ho hokahanya ho fokotsa ho bokella tefiso ea segokanyimmediamentsi sa sebolokigolo.
• Sebelisa litlolo tse khethehileng ho fokotsa liphello tse ka holimo.
3.2 Litharollo tse Khethehileng bakeng sa Mathata a le Mong-Liphello tsa Ketsahalo
Circuit Architecture-Tshireletso ea Boemo
• Sebelisa li-circuits tsa ho sefa le hysteresis litseleng tsa bohlokoa tsa analoge.
• Kenya tshebetsong triple modular redundancy (TMR) le ho hlabolla nako le nako bakeng sa dikarolo tsa taolo ya dijithale.
• Etsa mekhoa ea ho lemoha le ho hlaphoheloa kapele.
• Sireletsa lintlha tsa tlhophiso ka ho lemoha liphoso le likhoutu tsa tokiso.
Ntlafatso ea Moralo oa Sebopeho
• Eketsa masale a ho lebela ho pota-potile libaka tse bonolo.
• Sebelisa lipeakanyo tse tloaelehileng- tsa centroid ho fokotsa litlamorao tsa gradient.
• Ntlafatsa marang-rang a phano ea motlakase ho fokotsa ts'enyeho-ea holimo.
• Eketsa boholo ba li-transistor tse bohlokoa ho phahamisa tefiso ea bohlokoa.
Sistimi{{0}Mehato ea Mehato
• Etsa meralo{0}e sa hlokahaleng ea li-oscillator tse tšehetsang-ho switjha.
• Kenya tshebetsong-tekolo ya kgafetsa ya nako le ho lemoha ka tsela e sa tlwaelehang.
• Theha li-algorithms tse ikamahanyang le maemo ho khetholla le ho lefella litlamorao tsa nakoana.
• Theha maano a-ho lokisa orbit, ho kenyeletsoa le ho lokisa lipharamithara le ho hlaphoheloa ha liphoso.
3.3 Litlhoko tse Khethehileng tsa Teko le netefatso
Mekhoa ea Teko ea Radiation bakeng sa Crystal Oscillators
• Tekollo ea nako e telele- ea botsitso ba khafetsa ho lekola maemo a theohileng tlas'a TID.
• Tekanyo ea nako-ea sebele ea lerata la mohato ho lemoha mesaeno ea litlamorao tsa nakoana.
• Ho-teko ea makhaola-khang ho etsisa sephetho sa ketsahalo e le 'ngoe-.
• Ho etsa liteko tse potlakileng tsa bophelo ho bolela ho tšepahala ha nako e telele-.
Lintlha tsa bohlokoa tsa ho etsa liteko
• Likhau tsa likamano lipakeng tsa frequency offset le lethal dose kaofela.
• Liphetoho ho ponahalo ea lerata la mohato.
• Ho senyeha ha nako ea ho qala-le nako ea ho lokisa.
• Bokhoni ba ho boloka botšepehi ba waveform ea tlhahiso.
Qetello: Mokhoa oa Boenjiniere ba Litsamaiso ho Leka-tekanong le ho Ntlafatsa
Ho thatafala ha mahlaseli a kristale oscillator ke phephetso ea boenjiniere ba tsamaiso e hlokang hore ho fokotsoe-mehato e mengata:
Ho leka-lekanya Thepa le Mekhoa
• Thekiso{{0}pakeng tsa mahlaseli a hanyetsanang le lisebelisoa tsa kristale le botsitso ba khafetsa.
• Ho leka-lekanya tekanyo ea ho thatafala ha semiconductor khahlanong le tšebeliso ea matla le lebelo.
Litheolelo{{0}ka Moqapi oa Potoloho
• Melemo ea ts'epahalo ho tsoa ho fokotseheng khahlano le ho rarahana ho eketsehileng le tšebeliso ea matla.
• Ho leka-lekanya matla a mehato ea tšireletso khahlanong le litšenyehelo le boholo ba lithibelo.
Ntlafatso ea Mehaho ea Sisteme
• Moralo o hokahaneng oa -maano a tšireletso a maemo a mangata.
• Ho kopanngoa ha hardware{{0}software fault-maqheka a ho mamella.
• Kenyelletso ea bokhoni ba ho beha leihlo marang-rang le ho ikamahanya le maemo.
Qetellong, moralo o atlehileng oa mahlaseli{{0}moqapi o thata oa oscillator o hloka kutloisiso e hlakileng ea tikoloho ea ts'ebeliso le ho nahanisisoa ka botlalo mabapi le ts'ebetso, ts'epo, le litšenyehelo. Ka tsoelopele ea lisebelisoa tse ncha, mekhoa, le mats'eliso a bohlale a mats'oafo, ts'ebetso ea kristale oscillator tikolohong ea mahlaseli a kotsi e tla tsoela pele ho ntlafala, ho fana ka nako e matla haholoanyane-ea motheo bakeng sa lits'ebetso tse ts'epahalang tse phahameng{3} tse joalo ka lipatlisiso tsa sebaka se tebileng le matla a nyutlelie.
Tlhahlobo ena e lebisitsoeng le leano le thatafatsang li tiisa hore "ho otla ha pelo" ea tsamaiso e lula e tsitsitse ebile e tšepahala, esita le libakeng tse thata ka ho fetisisa tsa mahlaseli.