Dab tsi yog yam uas cuam tshuam rau kev ruaj ntseg ntawm quartz siv lead ua oscillators?
Crystal oscillators tau siv dav hauv kev siv tswv yim, piv txwv li, hauv CPU moos circuits. Txij li tsis yog txhua tus neeg nyeem tau paub txog lawv, tsab xov xwm no qhia txog qhov kev ruaj ntseg ntawm cov siv lead ua oscillators thiab txheeb xyuas cov xwm txheej cuam tshuam rau qhov kev ruaj ntseg ntawm quartz siv lead ua oscillators.
Frequency stability piav qhia txog qhov sib txawv ntawm qhov oscillator cov zis zaus tshwm sim los ntawm qhov kub thiab txias hloov thaum lub sijhawm ua haujlwm. Yog hais tias zaus drift tshaj qhov yuav tsum tau ntawm daim ntawv thov, lub sij hawm yuam kev yuav tshwm sim. Kev ruaj ntseg zaus yog teev nyob rau hauv qhov chaw ib lab (ppm), txheeb ze rau qhov nominal zaus thoob plaws qhov ntsuas kub.
Ib tug yam ntxwv tseem ceeb ntawm quartz siv lead ua oscillators yog lawv stability nyob rau hauv lub khiav hauj lwm kub ntau yam, thiab qhov no yog ib qho tseem ceeb cuam tshuam rau siv lead ua oscillator nqi. Qhov zoo dua qhov kev ruaj ntseg zaus los yog qhov dav ntawm kev khiav hauj lwm qhov kub thiab txias, qhov ntau dua tus nqi ntawm cov khoom. Qhov -40 ~ +85℃ntau yam uas tau teev tseg hauv cov qauv kev lag luam feem ntau yog xaiv los ntawm cov neeg tsim qauv tus cwj pwm. Yog tias qhov ntsuas -20 ~ +70℃raws li qhov yuav tsum tau ua, tsis tas yuav xaiv qhov ntsuas kub ntau dua. Cov kws tsim qauv tsim qauv yuav tsum ua tib zoo tshuaj xyuas qhov yuav tsum tau ua tiag tiag ntawm lawv daim ntawv thov ua ntej qhia txog qhov siv lead ua oscillator qhov ruaj khov. Over-specification ua rau tsis tsim nyog tus nqi nce.
Kev laus ntawm quartz siv lead ua oscillators yog lwm qhov tseem ceeb uas ua rau muaj kev hloov pauv ntau zaus. Nyob ntawm qhov kev pab cuam lub neej ntawm cov khoom kawg, muaj ntau txoj hauv kev los txo cov nyhuv no. Crystal aging ua rau cov zis zaus ua raws li lub logarithmic drift nkhaus, lub ntsiab lus ntawm kev laus yog feem ntau hais thaum thawj xyoo ntawm kev ua haujlwm. Piv txwv li, qhov kev laus ntawm cov siv lead ua tom qab ntau tshaj 10 xyoo ntawm kev ua haujlwm yog kwv yees li ib -feem peb ntawm nws tus nqi hauv thawj xyoo. Qhov drift no tuaj yeem raug txo los ntawm cov txheej txheem siv lead ua tshwj xeeb, lossis them nyiaj los ntawm kev kho. Ib qho piv txwv yog siv hluav taws xob rau tus pin tswj (piv txwv li kev sib koom ua ke ntawm kev tswj hluav taws xob).
Lwm yam cuam tshuam rau kev ruaj ntseg muaj xws li cov khoom siv hluav taws xob hloov pauv, hloov pauv hloov, theem suab nrov thiab jitter. Cov kev txwv no yuav tsum tau txhais thaum xaiv cov siv lead ua oscillators. Rau cov khoom lag luam- qib, kev co thiab kev poob siab yog qee zaum xav tau. Cov cuab yeej siv tub rog thiab aerospace tsim cov kev cai ntxiv, xws li kev ua siab ntev rau kev hloov pauv siab thiab raug hluav taws xob.
Quartz siv lead ua oscillators feem ntau yog tsim los ntawm hluavtaws quartz siv lead ua. Synthetic quartz txhawb nqa ntau lawm thiab txo cov nqi tsim khoom, thaum ntuj quartz siv lead ua tsuas yog siv rau hauv ib feem me me ntawm daim ntawv thov. Txawm li cas los xij, cov khoom siv raw khoom siv lead ua tau nce siab. Qee cov tuam txhab siv lead ua oscillator txais cov khoom siv tsis zoo rau kev tsim khoom loj los txiav cov nqi. Kev siv cov ntaub ntawv zoo li no yuav ua rau muaj teeb meem nrog rau qhov tsis zoo ntawm qhov raug rau SMD thiab cylindrical crystal oscillators, kev ua haujlwm kub tsis txaus, tsis ua haujlwm oscillate thiab lwm yam kev ua haujlwm tsis zoo.
Ib qho qauv tsim yuav tsum tau tshwj tseg thaum xaiv cov khoom kom ntseeg tau cov khoom lag luam. Xaiv cov qib siab dua - cov khoom siv qib siab tuaj yeem txo qhov ua tsis tiav thiab xa cov txiaj ntsig zoo. Qhov no kuj tseem yuav tsum tau muab coj mus rau hauv tus account thaum sib piv cov nqi khoom. Yuav kom ua tiav qhov sib npaug thiab tsim nyog tag nrho kev ua tau zoo ntawm quartz siv lead ua oscillators, engineers yuav tsum hnyav ntau yam xws li kev ruaj ntseg, kev khiav hauj lwm kub ntau, siv lead ua aging nyhuv, theem suab nrov thiab nqi. Tus nqi txiav txim siab tsis yog tsuas yog tus nqi ntawm cov khoom siv xwb tab sis kuj yog tus nqi ntawm lub neej.