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face="宋體">貼片表晶face="Helvetica">32.768Kface="宋體">系列具有face="宋體">超小型face="Helvetica">,face="宋體">薄型face="Helvetica">,face="宋體">質(zhì)地輕的表面貼片音叉型石英face="宋體">晶體諧振器face="Helvetica">,face="宋體">晶振產(chǎn)品本身face="宋體">具備優(yōu)良的耐熱性face="Helvetica">,face="宋體">耐環(huán)境特性face="Helvetica">,face="宋體">在辦公自動(dòng)化face="Helvetica">,face="宋體">家電領(lǐng)域face="Helvetica">,face="宋體">移動(dòng)通信領(lǐng)域可發(fā)揮優(yōu)良的電氣特性face="Helvetica">,face="宋體">符合無鉛標(biāo)準(zhǔn)face="Helvetica">,face="宋體">滿足無鉛焊接的回流溫度曲線要求face="Helvetica">,face="宋體">金屬外殼的石英晶振face="宋體">使得產(chǎn)品在封裝時(shí)能發(fā)揮比陶瓷晶振face="宋體">外殼更好的耐沖擊性能.
face="宋體">有源晶振是用石英晶體組成的,石英晶片之所以能當(dāng)為振蕩器使用,是基于它的壓電效應(yīng):在晶片的兩個(gè)極上加一電場,會(huì)使晶體產(chǎn)生機(jī)械變形;在石英晶片上加上交變電壓,晶體就會(huì)產(chǎn)生機(jī)械振動(dòng),同時(shí)機(jī)械變形振動(dòng)又會(huì)產(chǎn)生交變電場,雖然這種交變電場的電壓極其微弱,但其振動(dòng)頻率是十分穩(wěn)定的。當(dāng)外加交變電壓的頻率與晶片的固有頻率(由晶片的尺寸和形狀決定)相等時(shí),機(jī)械振動(dòng)的幅度將急劇增加,這種現(xiàn)象稱為face="Arial">“face="宋體">壓電諧振face="Arial">”face="宋體">。