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
2019-12-25 石英晶振的主要参数有标称频率,负载电容、频率精度、频率稳定度等。不同的晶振标称频率不同,标称频率大都标明在晶振外壳上。如常用普通晶振标称频率有:48kHz、500kHz、503.5kHz、1MHz~40.50MHz等,对于特殊要求的晶振频率可达到1000MHz以上,也有的没有标称频率,如CRB、ZTB、Ja等系列。负载……
2019-12-25 石英晶振条件 1)相位平衡2)振幅平衡 石英晶振是由品质因素极高的石英晶体振子(即谐振器和振荡电路组成。晶体的品质切割取向、晶体振子的结构及电路形式等,共同决定振荡器的性能。国际电工委员会(EC)将石英晶体振荡器分为4类:普通晶体振荡(TCXO),电压控制式晶体振荡器(vCXO),温度补偿式……
2019-12-25 石英晶振是高精度和高稳定度的振荡器,被广泛应用于彩电、计算机、遥控器等各类振荡电路中,以及通信系统中用于頻率发生器、为数据处理设备产生时钟信号和为特定系统提供基准信号。 1、石英晶体振荡器的结构 石英晶体振荡器是利用石英晶体(二氧化硅的结晶体)的压电效应制成的一种谐振器件,它的基本构成大致是:从一块……
2019-12-24 1. Passive crystal oscillator - the passive crystal oscillator needs to use the oscillator in the DSP chip, and the proposed connection method is shown in the d……
2019-12-17 High and low temperature impact test box is a kind of accurate environmental test instrument, and the cost of equipment acquisition is high, so usually in the use of the process to operate according to the rules, more attention to maintenance, that is, ho
2019-12-16 当我们在研究（research)电子线路的时候，不少人会提到晶振，其实根据分类来看，它包括两大类型，第一个是无源晶振，另一个是有源晶振，那么我们在进行了解的时候，不妨借此来全面分析(Analyse)一下第二个类型的晶振！ 对于有源晶振来说，其具备的特征是比较明显的，它就是所谓的晶体振荡器的全称，对于它的引脚配件来……
2019-12-16 传输法测量线路如图1所示，它是由讯号源、测试（TestMeasure)网络和指示器三部分组成。为了保证一定的测量精度（精确度），对测量线路的各部分都有一定要求。 1、频率(frequency)综合器(即讯号源) 对频率综合器的要求是：输出频率稳定（解释:稳固安定；没有变动)度要优于1×10-6/天;输出阻抗……
2019-12-16 与有源晶体振荡器相比，有源晶体振荡器不需要数字信号处理器的内部振荡器，信号质量好，相对稳定（解释:稳固安定；没有变动)，连接方式相对简单(电源滤波主要完成，输出通常采用电容和电感组成的pi型滤波网络，信号用小电阻滤波)。与无源晶体相比，有源晶体振荡器不需要复杂的配置(deploy)电路。有源晶体振荡器的缺点是信号电平固……
