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Principle of crystal oscillator circuit 2020-04-01
Principle of crystal oscillator circuit

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


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How difficult it is to miniaturize the technology of SMT 2020-03-26
How difficult it is to miniaturize the technology of SMT

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


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How to choose a patch transistor 2020-01-13
How to choose a patch transistor

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


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What should petite volume SMT crystal oscillator pay attention to? 2020-01-07
What should petite volume SMT crystal oscillator pay attention to?

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


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What kind of material is the SMT crystal oscillator? 2019-12-31
What kind of material is the SMT crystal oscillator?

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


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石英晶振微天平室内空气质量检测传感器的研究 2019-12-31
石英晶振微天平室内空气质量检测传感器的研究

石英晶振微天平(Quartz Crystal Microbalance,QCM)气体传感器,因此石英晶体外貌敏感薄膜为敏感元件,以AT切型石英晶体为换能元件,行使石英晶体的品质—频率变更干系,将待测气体的浓度灯号转换成频率灯号输出,从而完成气体浓度的检验。 本文以研制室内气氛品质检验微传感器为目标,对石英晶振微天平气体……


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石英晶振器件的激光刻蚀频率微调研究 2019-12-31
石英晶振器件的激光刻蚀频率微调研究

石英晶振,以其崇高频率巩固度、高Q值、高振荡频率及体积精巧等特色,在军事、通信、电脑、家用电器及种种产业电子装备中获得了宽泛的运用。跟着科学技术的接续开展,对石英晶振谐振器切确度的请求越来越高,切确调治石英晶振谐振器的频率,是国表里钻研和制造中的热门疑问。 本文索求性钻研了一种新鲜的频率微调技术——激光刻蚀微调。论文从……


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石英晶振用于石英增强光声光谱系统的优化实验研究 2019-12-30
石英晶振用于石英增强光声光谱系统的优化实验研究

钻研了音叉式石英晶振的个别尺寸、安顿角度、探测部位以及外部玷污对全部石英加强光声光谱体系(QEFAS)的探测生动度影响。尝试了国表里十种差别音,后果评释顶端为楔形组织的音叉式石英晶振比准则的长方体组织的音叉领有更高的品格因数(Q值)。在相像的尝试前提下探测水的吸取线(7 306 cm~(-1))时获取更高的生动度,探测……


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石英晶振可靠性研究 2019-12-30
石英晶振可靠性研究

石英晶振是一种供应高精度频率的高严紧器件,比年来,信息技术家当飞速开展,石英晶振家当抖擞出了勃勃生气。石英晶振在高速电脑、挪动电话、环球定位体系(GPS)、航空航天、严紧丈量仪器、长途通讯、卫星通讯、导航、遥控以及花费类电子产物中都有着很宽泛的应用。石英晶抖擞为尺度频率源,要紧功效是供应高精度的频率基准。固然石英晶振生……


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石英晶振管 2019-12-28
石英晶振管

XO石英晶振,这种振荡器是没有温度控制或补偿装置的器件,也称为PXO、OSC、普通晶体振荡器。它是将晶体元件与振荡电跻按设计要求,集成装配在电路板上并用外壳封装而成的器件。 XO常见的封装主要以插针式和表面贴封装两种,而插针式又以D|P14(长方形)和DP8(正方形)为主:随着市场的演变,不断追求小型化和高稳定性,因此科玛通信在市场上主打封装改为表面贴(SMD)7×5,5×32等尺寸,这两种尺寸面对 LVPECL,LVDs,cMoS,ECL等输出模式都可以提供。 vcXo压控晶


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有源晶振是右石英晶振组成的 2019-12-28
有源晶振是右石英晶振组成的

有源晶振是右石英晶振组成的,石英晶片之所以能当为振荡器使用,是基于它的压电效应在晶片的两个极上加一电场,会使晶体产生机械变形:在石英晶片上加上交变电压,晶体就会产生机械振动,同时机械变形振动又会产生交变电场,虽然这种交变电场的电压极其微弱,但其振动频率是十分稳定的。当外加交变电压的频率与晶片的固有频率(由晶片的尺寸和形……


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石英晶振使用过程注意事项 2019-12-27
石英晶振使用过程注意事项

新的石英晶振使用之前应在分析纯中浸泡约1分钟,然后用塑料镊子夹取并用无尘纸或洁净的绸布将分析纯擦拭干净,同时用蘸有酒精的无尘纸或绸布将晶振座擦拭干净,组装晶振片之前用吹气球将晶振片、晶振座及探头的接触弹簧上可能残留的灰尘吹掉任何晶体和夹具之间的颗粒或灰层将影响电子接触,而且会产生应力点,从而改变晶体振动的模式,晶振片装……


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