Pfupiso yekristaro oscillator
Crystal oscillator inoreva chidimbu chakachekwa kubva kukristaro yequartz zvinoenderana neimwe azimuth Angle, quartz crystal resonator, inonzi quartz crystal kana crystal oscillator;Iyo crystal element ine IC yakawedzerwa mukati mepakeji inonzi crystal oscillator.Zvigadzirwa zvaro zvinowanzoiswa mumakesi esimbi, asiwo mumakesi egirazi, ceramics kana plastiki.
Kushanda musimboti wekristaro oscillator
Quartz crystal oscillator chishandiso chine resonant chakagadzirwa nepiezoelectric mhedzisiro yequartz crystal.Kuumbwa kwayo kwakada kuita sezvizvi: Kubva kukristaro yequartz zvinoenderana neimwe azimuth slice, yakaputirwa nesirivheri layer pamativi ayo maviri anoenderana semaelectrode, yakakwenenzverwa waya yekutungamirira pane imwe neimwe electrode yakabatana nepini, yakasanganiswa negoko repasuru rakagadzirwa. quartz crystal resonator, inonzi quartz crystal kana crystal, crystal vibration.Zvigadzirwa zvaro zvinowanzoiswa mumakesi esimbi, asiwo mumakesi egirazi, ceramics kana plastiki.
Kana munda wemagetsi ukaiswa kune maviri maelectrode ekristaro yequartz, chip chinokanganisa mechanically.Sezvineiwo, kana mechanical pressure ikaiswa pamativi ese echip, munda wemagetsi uchagadzirwa munzira inowirirana yechip.Ichi chiitiko chemuviri chinonzi piezoelectric effect.Kana maalternating voltages akaiswa pamapango maviri echip, iyo chip inoburitsa ma mechanical vibrations, izvo zvinozoita zvinogadzira magetsi anochinjana.
Kazhinji, iyo amplitude ye mechanical vibration ye chip uye amplitude yealternating electric field iduku zvikuru, asi kana kuwanda kweiyo inoshandiswa alternating voltage iri yakakosha kukosha, amplitude inowedzera zvakanyanya, yakakura kudarika iyo yemamwe mafrequencies. , chiitiko ichi chinonzi piezoelectric resonance, iyo yakafanana zvikuru neresonance yeLC circuit.Yayo resonant frequency inoenderana nekucheka modhi, geometry uye saizi yechip.
Kana kristaro ikasadengenyeka, inogona kutorwa seflat capacitor inonzi electrostatic capacitance C, uye saizi yaro ine hukama nehukuru hwejometri yechip uye nzvimbo ye electrode, kazhinji ingangoita nzira shoma yeganda kune akawanda eganda nzira. .Apo iyo crystal oscillates, inertia ye mechanical vibration yakaenzana ne inductance L. Kazhinji, L maitiro anobva pamakumi kusvika kumazana emadhigirii.Iyo elasticity ye chip inogona kuenzana ne capacitance C, iyo idiki kwazvo, kazhinji chete 0.0002 ~ 0.1 picograms.Kurasikirwa kunokonzerwa nekukweshera panguva yewafer vibration kwakaenzana neR, iyo ine kukosha kwe100 ohms.Nekuti iyo yakaenzana inductance ye chip yakakura kwazvo, uye C idiki kwazvo, R zvakare idiki, saka mhando yemhando Q yedunhu yakakura kwazvo, inosvika 1000 ~ 10000. Mukuwedzera, iyo resonant frequency ye chip pachayo. inongoenderana chete neyekucheka modhi, geometry uye saizi yechip, uye inogona kuitwa chaizvo, saka oscillator redunhu rinoumbwa nequartz resonators rinogona kuwana yakakwira frequency kugadzikana.
Makomputa ane dunhu renguva, uye kunyangwe izwi rekuti “wachi” richiwanzo shandiswa kureva midziyo iyi, haasi iwo wachi nenzira yakajairika.Vanogona kunge vari nani kunzi timers.Chiyereso chekombuta chinowanzo christamende yequartz yakanyatsogadzirwa iyo inotenderera mukati memiganho yekushushikana pane frequency zvinoenderana nekuti iyo kristaro pachayo inochekwa sei uye kuti ingani kushushikana kwairi kuita.Kune marejista maviri akabatana neimwe quartz crystal, counter uye rejista yekubata.Imwe neimwe oscillation ye quartz crystal inoderedza counter neimwe.Kana iyo counter yadzikira kusvika ku0, kukanganisa kunogadzirwa uye iyo counter inorodhazve kukosha kwekutanga kubva kurejista yekubata.Iyi nzira inoita kuti zvikwanisike kuronga timer kuti ibudise 60 inovhiringidza pasekondi (kana pane imwe nguva yaunoda).Kukanganisa kwega kwega kunonzi clock tick.
Mumashoko emagetsi, crystal oscillator inogona kuenzana ne-two-terminal network ye capacitor uye resistor in parallel uye capacitor munhevedzano.Muinjiniya yemagetsi, iyi network ine maviri resonance mapoinzi, ayo akakamurwa kuita akakwira uye akaderera ma frequency.Iyo yakaderera frequency ndeye yakatevedzana resonance, uye iyo yepamusoro frequency ndeye parallel resonance.Nekuda kwehunhu hwekristaro pachayo, chinhambwe chiri pakati pemafrequency maviri chiri padyo.Mune iyi yakatetepa frequency renji, iyo crystal oscillator yakaenzana neinductor, chero bedzi migumo miviri yekristaro oscillator yakabatana mukuenderana neakakodzera capacitor, ichaita parallel resonance circuit.Iyi parallel resonant circuit inogona kuwedzerwa kune yakaipa mhinduro yedunhu kuti iite sinusoidal oscillation circuit.Nekuti iyo frequency renji yekristaro oscillator yakaenzana ne inductance yakanyanya kutetepa, iyo frequency yeiyi oscillator haizoshanduke zvakanyanya kunyangwe ma paramita ezvimwe zvikamu achisiyana zvakanyanya.
Crystal oscillator ine yakakosha parameter, iyo inotakura capacitance kukosha, sarudza parallel capacitance yakaenzana nemutoro capacitance kukosha, inogona kuwana zita resonance frequency yecrystal oscillator.General vibration crystal oscillation circuit iri pakatarisana nemigumo ye inverting amplifier yakabatana nemakristasi ane maviri capacitance anogamuchira migumo yemakristasi, zvichiteerana yega capacitance kune rimwe divi rekugamuchira, kugona kweaviri capacitor mukuteedzana kukosha kunofanirwa kuenzana. kune huwandu hwekuremerwa, ndapota teerera kune general IC mapini ane yakaenzana yekupinza capacitance, izvi hazvigone kufuratirwa.Kazhinji, iyo capacitance yemutoro yekristaro oscillator ndeye 15 kana 12.5 ganda.Kana iyo yakaenzana yekupinza capacitance yepini yechikamu ichitariswa, iyo oscillation yedunhu yekristaro oscillator inoumbwa maviri 22 ganda capacitor isarudzo iri nani.
Nguva yekutumira: Oct-20-2021