2020-04-01 Crystal oscillator is short for crystal oscillator. In electrical terms, it is equivalent to a network of capacitors and resistors in parallel to a series capacitor. From the point of view of electricity, the network has two common vibration points. Becau
2020-03-26 In the intelligent terminal tend to be "light, thin, short, small", under the trend of the traditional clock components - quartz crystal oscillator (often called quartz crystal oscillator and crystal oscillator) industry began to perk up, produc
2020-01-13 SMT transistor selection There are several main problems in the application of SMT transistor: One is the past use of through hole assembly transistor habit, how to find the corresponding chip transistor; The other is to find out from
2020-01-07 In recent years, with the development of electronic products such as smart phones, computers and televisions, as well as the technological progress of core components such as navigation antenna and chip (module), the core components with small size and lo
2019-12-31 The development of economy also means that people have higher and higher demands for their own lives. In the process of seeking their own dreams, they will ignore many details around them, such as the formation of some technologies and the award of scient
2019-12-31 石英晶振微天平(Quartz Crystal Microbalance,QCM)氣體傳感器,因此石英晶體外貌敏感薄膜為敏感元件,以AT切型石英晶體為換能元件,行使石英晶體的品質(zhì)—頻率變更干系,將待測氣體的濃度燈號轉(zhuǎn)換成頻率燈號輸出,從而完成氣體濃度的檢驗。 本文以研制室內(nèi)氣氛品質(zhì)檢驗微傳感器為目標(biāo),對石英晶振微天平氣體……
2019-12-31 石英晶振,以其崇高頻率鞏固度、高Q值、高振蕩頻率及體積精巧等特色,在軍事、通信、電腦、家用電器及種種產(chǎn)業(yè)電子裝備中獲得了寬泛的運用。跟著科學(xué)技術(shù)的接續(xù)開展,對石英晶振諧振器切確度的請求越來越高,切確調(diào)治石英晶振諧振器的頻率,是國表里鉆研和制造中的熱門疑問。 本文索求性鉆研了一種新鮮的頻率微調(diào)技術(shù)——激光刻蝕微調(diào)。論文從……
2019-12-30 鉆研了音叉式石英晶振的個別尺寸、安頓角度、探測部位以及外部玷污對全部石英加強光聲光譜體系(QEFAS)的探測生動度影響。嘗試了國表里十種差別音,后果評釋頂端為楔形組織的音叉式石英晶振比準(zhǔn)則的長方體組織的音叉領(lǐng)有更高的品格因數(shù)(Q值)。在相像的嘗試前提下探測水的吸取線(7 306 cm~(-1))時獲取更高的生動度,探測……
2019-12-30 石英晶振是一種供應(yīng)高精度頻率的高嚴(yán)緊器件,比年來,信息技術(shù)家當(dāng)飛速開展,石英晶振家當(dāng)抖擻出了勃勃生氣。石英晶振在高速電腦、挪動電話、環(huán)球定位體系(GPS)、航空航天、嚴(yán)緊丈量儀器、長途通訊、衛(wèi)星通訊、導(dǎo)航、遙控以及花費類電子產(chǎn)物中都有著很寬泛的應(yīng)用。石英晶抖擻為尺度頻率源,要緊功效是供應(yīng)高精度的頻率基準(zhǔn)。固然石英晶振生……
2019-12-28 XO石英晶振,這種振蕩器是沒有溫度控制或補償裝置的器件,也稱為PXO、OSC、普通晶體振蕩器。它是將晶體元件與振蕩電躋按設(shè)計要求,集成裝配在電路板上并用外殼封裝而成的器件。 XO常見的封裝主要以插針式和表面貼封裝兩種,而插針式又以D|P14(長方形)和DP8(正方形)為主:隨著市場的演變,不斷追求小型化和高穩(wěn)定性,因此科瑪通信在市場上主打封裝改為表面貼(SMD)7×5,5×32等尺寸,這兩種尺寸面對 LVPECL,LVDs,cMoS,ECL等輸出模式都可以提供。 vcXo壓控晶
2019-12-28 有源晶振是右石英晶振組成的,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)在晶片的兩個極上加一電場,會使晶體產(chǎn)生機械變形:在石英晶片上加上交變電壓,晶體就會產(chǎn)生機械振動,同時機械變形振動又會產(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……
2019-12-27 新的石英晶振使用之前應(yīng)在分析純中浸泡約1分鐘,然后用塑料鑷子夾取并用無塵紙或潔凈的綢布將分析純擦拭干凈,同時用蘸有酒精的無塵紙或綢布將晶振座擦拭干凈,組裝晶振片之前用吹氣球?qū)⒕д衿?、晶振座及探頭的接觸彈簧上可能殘留的灰塵吹掉任何晶體和夾具之間的顆?；蚧覍訉⒂绊戨娮咏佑|,而且會產(chǎn)生應(yīng)力點,從而改變晶體振動的模式,晶振片裝……
