Re atisa ho bapisa kristale oscillator le pelo ea potoloho ea digital, hobane mosebetsi oohle oa potoloho ea digital o ke ke oa arohana le letšoao la oache, 'me kristale oscillator e laola tsamaiso eohle ka ho toba.Haeba oscillator ea kristale e sa sebetse, tsamaiso eohle e tla holofala, kahoo kristale oscillator ke ntho e hlokahalang hore potoloho ea digital e qale ho sebetsa.
kristale oscillator, joalokaha re atisa ho re, ke quartz kristale oscillator le quartz kristale resonator.Ka bobeli li entsoe ka phello ea piezoelectric ea likristale tsa quartz.Ho sebelisa sebaka sa motlakase ho li-electrode tse peli tsa kristale ea quartz ho baka deformation ea mochini oa kristale, athe ho sebelisa khatello ea mochini mahlakoreng ka bobeli ho etsa hore sebaka sa motlakase se be teng ka har'a kristale.'Me liketsahalo tsena ka bobeli li ka fetoha.Ka ho sebelisa thepa ena, ho sebelisoa li-voltage tse fapaneng mahlakoreng ka bobeli a kristale, 'me sephaphatha se sisinyeha ka mochini, hammoho le ho hlahisa masimo a motlakase a fapanyetsanang.Mofuta ona oa ho sisinyeha le matla a motlakase ka kakaretso a nyane, empa ka nako e itseng, amplitude e tla eketseha haholo, e leng piezoelectric resonance, e ts'oanang le LC loop resonance eo re e bonang hangata.
Joalo ka pelo ea potoloho ea dijithale, kristale oscillator e bapala karolo joang lihlahisoa tse bohlale?Lehae le bohlale joalo ka moea, likharetene, ts'ireletso, tlhokomelo le lihlahisoa tse ling, kaofela li hloka mojule oa phetisetso ea waelese, ka Bluetooth, WIFI kapa ZIGBEE protocol, module ho tloha pheletsong e 'ngoe ho isa pheletsong e' ngoe, kapa ka kotloloho ka taolo ea mohala oa thekeng, le mochine o se nang mohala ke karolo ea mantlha, e amang botsitso ba tsamaiso eohle, kahoo khetha mokhoa oa ho sebelisa kristale oscillator.E khetha katleho kapa ho hloleha ha li-circuits tsa digital.
Ka lebaka la bohlokoa ba kristale oscillator potolohong ea dijithale, re hloka ho ba hlokolosi ha re sebelisa le ho rala:
1. Ho na le likristale tsa quartz ka kristale oscillator, e leng bonolo ho baka ho senyeha ha kristale ea quartz le ho senya ha e ameha kapa e theoha ka ntle, ebe joale kristale oscillator e ke ke ea sisinyeha.Ka hona, ts'ebetso e ka tšeptjoang ea oscillator ea kristale e lokela ho nkoa ka moralo oa potoloho, 'me boemo ba eona ha boa lokela ho ba haufi le moeli oa poleiti le khetla ea thepa ka hohle kamoo ho ka khonehang.
2. Ela hloko mocheso oa tjheseletsa ha o tjheseletsa ka letsoho kapa ka mochini.Crystal vibration e na le maikutlo a mocheso, mocheso oa welding ha oa lokela ho ba holimo haholo, 'me nako ea ho futhumatsa e lokela ho ba khutšoanyane ka hohle kamoo ho ka khonehang.
Sebopeho se utloahalang sa kristale oscillator se ka hatella tšitiso ea mahlaseli a tsamaiso.
1. Tlhaloso ea bothata
Sehlahisoa ke khamera ea tšimo, e nang le likarolo tse hlano ka hare: boto ea taolo ea mantlha, boto ea sensor, khamera, karete ea memori ea SD le betri.Khetla ke khetla ea polasetiki, 'me boto e nyane e na le lihokelo tse peli feela: sehokelo sa matla sa kantle sa DC5V le sebopeho sa USB bakeng sa phetiso ea data.Kamora tlhahlobo ea radiation, ho fumanoe hore ho na le bothata ba mahlaseli a lerata a harmonic a ka bang 33MHz.
Lintlha tsa mantlha tsa tlhahlobo ke tse latelang:
2. Sekaseka bothata
Sebopeho sena sa khetla ea khetla ea polasetiki, thepa e sa sireletseng, teko eohle ke thapo ea matla feela le thapo ea USB e tsoang ka har'a khetla, na ke sebaka sa tšitiso se hlahisoang ke thapo ea matla le thapo ea USB?Ka hona, ho etsoa liteko tse latelang:
(1) Eketsa selikalikoe sa makenete holim'a thapo ea matla feela, liphetho tsa liteko: ntlafatso ha e bonahale;
(2) Kenya feela selikalikoe sa makenete ho thapo ea USB, liphetho tsa liteko: ntlafatso e ntse e sa totobala;
(3) Eketsa selikalikoe sa makenete ho bobeli ba thapo ea USB le thapo ea matla, liphetho tsa liteko: ntlafatso e hlakile, khafetsa tšitiso e fokotsehile.
Ho ka bonoa ho tsoa ho tse kaholimo hore lintlha tsa tšitiso li hlahisoa ho tsoa ho li-interfaces tse peli, e seng bothata ba sebopeho sa matla kapa sebopeho sa USB, empa lintlha tsa tšitiso ea kahare tse kopantsoeng le likhokahano tse peli.Ho sireletsa sebopeho se le seng feela ho ke ke ha rarolla bothata.
Ka tekanyo e haufi-ufi, ho fumanoa hore kristale oscillator ea 32.768KHz e tsoang botong ea taolo ea mantlha e hlahisa mahlaseli a matla a sebaka, a etsang hore likhoele tse potolohileng le GND li kopane le 32.768KHz lerata la harmonic, le kopanngoeng le ho khabisoa ka har'a thapo ea USB. thapo ea matla.Mathata a kristale oscillator a bakoa ke mathata a mabeli a latelang:
(1) Ho sisinyeha ha kristale ho haufi haholo le pheletso ea poleiti, e leng bonolo ho lebisa lerata la mahlaseli a kristale.
(2) Ho na le mohala oa pontšo tlas'a kristale oscillator, e leng bonolo ho lebisa lerata la harmonic la mohala oa pontšo o kopanyang kristale oscillator.
(3) Karolo ea filthara e behiloe tlas'a kristale oscillator, 'me mochini oa filthara le khanyetso e ts'oanang ha e hlophisoe ho latela tataiso ea lets'oao, e leng se etsang hore phello ea ho sefa ea karolo ea filthara e mpe le ho feta.
3, tharollo
Ho latela tlhahlobo, mehato e latelang e fumanoa:
(1) Matla a filthara le khanyetso e ts'oanang ea kristale e haufi le chip ea CPU li behiloe ka thoko ho tloha pheletsong ea boto;
(2) Hopola hore u se ke ua beha fatše sebakeng sa kristale le sebaka sa projeke ka tlase;
(3) Matla a filthara le khanyetso e ts'oanang ea kristale e hlophisoa ho ea ka tataiso ea matšoao, 'me e behiloe ka makhethe ebile e kopane haufi le kristale;
(4) kristale e behiloe haufi le chip, 'me moeli o pakeng tsa tse peli o khutšoanyane ebile o otlolohile ka hohle kamoo ho ka khonehang.
4. Qetello
Matsatsing ana litsamaiso tse ngata tsa kristale oscillator oache maqhubu a phahameng, tšitiso ea harmonic matla a matla;Li-harmonics tsa ho kena-kenana ha li fetisoe feela ho tloha meleng ea ho kenya le ho tsoa, empa hape li fetisoa ho tloha sebakeng.Haeba moralo o sa utloahale, ho bonolo ho baka bothata bo matla ba mahlaseli a lerata, 'me ho thata ho rarolla ka mekhoa e meng.Ka hona, ho bohlokoa haholo bakeng sa moralo oa kristale oscillator le mohala oa lets'oao la CLK ho sebopeho sa boto ea PCB.
Hlokomela ka moralo oa PCB oa kristale oscillator
(1) Coupling capacitor e lokela ho ba haufi le pinana ea phepelo ea matla ea kristale oscillator kamoo ho ka khonehang.Boemo bo lokela ho behoa ka tatellano: ho ea ka tataiso ea phallo ea motlakase, capacitor e nang le matla a fokolang ka ho fetisisa e lokela ho behoa ka tatellano ho tloha ho e kholo ho ea ho e nyenyane ka ho fetisisa.
(2) Khetla ea kristale oscillator e tlameha ho behoa fatše, e ka khantšang kristale oscillator ka ntle, hape e ka sireletsa tšitiso ea matšoao a ka ntle ho kristale oscillator.
(3) U se ke ua thapo ka tlas'a kristale oscillator ho etsa bonnete ba hore fatše ho koahetsoe ka ho feletseng.Ka nako e ts'oanang, u se ke ua kenya mohala ka hare ho 300mil ea kristale oscillator, e le ho thibela oscillator ea kristale ho kena-kenana le ts'ebetso ea lisebelisoa tse ling, lisebelisoa le lihlopha.
(4) Mohala oa letšoao la oache o lokela ho ba o khutšoanyane ka hohle kamoo ho ka khonehang, mohala o lokela ho ba o pharaletseng, 'me ho leka-lekana ho lokela ho fumanoa ka bolelele ba mohala le hole le mohloli oa mocheso.
(5) Oscillator ea kristale ha ea lokela ho behoa moeling oa boto ea PCB, haholo-holo ka moralo oa karete ea boto.
