Nigute Wamenya Byihuse Kunanirwa kwa Crystal Oscillator?

• Ni ibihe bibazo bishobora gutera Oscillator ya Crystal Ikosa?

1.Nta gisubizo ku mbaraga - hejuru (gutsindwa bikomeye): Iyo kristu ihindagurika idashobora gutangira kunyeganyega, umugenzuzi mukuru ntabwo yakira isaha yerekana, logique yo gusubiramo imbere ntishobora kurangira, kandi sisitemu yose iguma idakora. Ibimenyetso bisanzwe birimo: gutanga ibyagezweho munsi yurwego rusanzwe rwimikorere, interineti yo gukuramo itamenyekanye, kandi nta kwerekana kuri ecran.

2.Impanuka zisanzwe cyangwa gusubiramo mugihe cyo gukora (gutsindwa byoroshye): kugabanuka kwa oscillator gusohora amplitude cyangwa guhinduka gutunguranye kwinshuro, biganisha kuri CPU igihe cyarenze no kubahiriza amabwiriza nabi. Ibimenyetso bisanzwe birimo gukonjeshwa rimwe na rimwe, gusubiramo bikururwa nizamu, no kubyara amakosa bidahuye.

3.CitumanahoImigaragarire ya desynchronisation hamwe namakosa ya bit:Gutandukana kw'isaha (ikosa rya PPM) birashobora kurenza bit - idirishya rya syncronisation ya protocole nka UART, USB, na Ethernet, biganisha ku makuru yanduye, kunanirwa kugenzura, kwiyongera kwinshi, kandi, mubihe bikomeye, byuzuye umubiri -.

4.Igihe cyangiritse no gupima neza:Kuri RTCs, metero z'amashanyarazi, hamwe nibindi bikorwa bishingiye ku gihe cyagenwe, drift yegeranya kugirango itange amakosa yumunsi. Iyo kristu ihuye nubushuhe cyangwa gusaza, intera ya kabiri - intera itandukana, bigira ingaruka itaziguye kuri fagitire cyangwa sisitemu - igihe cyagenwe.

• Kuki Oscillator ya Crystal yananiwe?

Usibye gukora inenge (nk'insinga y'imbere - impfabusa cyangwa impagarara zisigaye), uburyo busanzwe bwo kunanirwa bwagaragaye mubikorwa byo murwego birimo:

1.Guhangayikishwa no gukanika ubushyuhe:Hejuru - inshuro zidasanzwe za kirisiti ni nto cyane. Guhangayikishwa no kugabanuka kwa PCB no guhindagurika kwubushyuhe bwihuse mugihe cyo kugurisha ibintu bishobora gutera micro - gucika cyangwa gutandukana na electrode, ibyo bigatuma habaho izamuka rikabije ryurwego rukurikirana (ESR).

2.PCB yanduza inzira (ibisigisigi bya flux):Kugurisha - ibisigisigi bya flux bigira inzira zidacika intege hagati yipine, bigatangiza neza igihombo cya parasitike irwanya igabanuka igabanya ihungabana - inyungu. Imanza zoroheje zitera gutandukana inshuro; imanza zikomeye zitera kubura ihungabana.

3.Ubwoko bwa Overtone ihindagurika:Niba ubushobozi bwimitwaro cyangwa icyiciro cya shoferi bidakozwe neza, oscillator irashobora gufunga kumurongo wa 3 cyangwa 5 ya overtone inshuro ya kristu. Muri iki kibazo, kristu ubwayo ntabwo ivunitse, ariko isaha ya sisitemu ihinduka inshuro nyinshi zagenewe inshuro nyinshi, hamwe na peripheri zose zidakora neza.

4.Gusohora amashanyarazi (ESD) kwangirika:Izi ngaruka zirakenewe cyane cyane kuri oscillator ikora irimo umuzunguruko wa CMOS. ESD irashobora gutesha agaciro irembo rya oxyde, kandi amakosa akunze kugaragara nkumuvuduko ukabije hamwe nubushyuhe bwiyongera.

5.Inshuro - Ubushyuhe bukabije:Hafi yubushyuhe bwubushyuhe bugaragara muri datasheet (urugero, –20 dogere cyangwa +70 dogere), gutandukana inshuro byiyongera cyane. Niba chip ubwayo - gushyushya byongera ubushyuhe bwibidukikije, offset nyirizina irashobora kugera kuri ppm magana.

6.Imbaraga zo gutwara cyane: Umuvuduko mwinshi cyane wumuvuduko uzamura ubushyuhe bwumuriro kuri kristu yambaye ubusa, byihuta gusaza, ndetse birashobora no gutuma habaho - umurongo utambamirwa utandukanijwe, ugatesha agaciro umurongo uhoraho.

• Hbitewe no kugabanya ibyago byo kwangirika kwa Crystal Oscillator?

1.Imiterere ya PCB kugirango wirindeubukanishiguhangayika:Shyira kristu hafi ishoboka kuri pin ya IC, komeza ibimenyetso bigufi n'ubutaka - kurinda; irinde kuyishakira hafi yumwanya - gutandukanya cyangwa hejuru - uturere duhangayitse, hanyuma utekereze kongeramo uturere.

2. Kugurisha no kugenzura isuku: Koresha oya - isukuye kandi ukore ibizamini byo kwanduza ion nyuma yo kugurisha ibicuruzwa; ntukoreshe igitutu gihagaritse kumubiri.

3.Shiraho imbaraga zikwiye zo gutwara:Huza urukurikirane rw'ibihe - bigabanya imbogamizi (mubisanzwe 100 Ω kugeza 1 kΩ) kugirango ugumane imbaraga nyazo zo munsi ya 100 μW, ukurikije imibare - indangagaciro zisabwa.

4.Kurinda ESD:Wambare anti - umukandara wamaboko uhagaze mugihe cyo kugurisha intoki, kandi urebe ko intebe yakazi ihagaze neza.

5.Kurwanya ibidukikije:Kubikoresho bikarishye byo hanze cyangwa ibinyabiziga, hitamo inganda / ibinyabiziga - icyiciro (–40 dogere kugeza +125 dogere) ibyuma - kristu yamashanyarazi nayo itanga imbaraga zo kurwanya ubushuhe na sulfide.