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 石英晶振的主要參數(shù)有標(biāo)稱頻率,負(fù)載電容、頻率精度、頻率穩(wěn)定度等。不同的晶振標(biāo)稱頻率不同,標(biāo)稱頻率大都標(biāo)明在晶振外殼上。如常用普通晶振標(biāo)稱頻率有:48kHz、500kHz、503.5kHz、1MHz~40.50MHz等,對于特殊要求的晶振頻率可達(dá)到1000MHz以上,也有的沒有標(biāo)稱頻率,如CRB、ZTB、Ja等系列。負(fù)載……
2019-12-25 石英晶振條件 1)相位平衡2)振幅平衡 石英晶振是由品質(zhì)因素極高的石英晶體振子(即諧振器和振蕩電路組成。晶體的品質(zhì)切割取向、晶體振子的結(jié)構(gòu)及電路形式等,共同決定振蕩器的性能。國際電工委員會(huì)(EC)將石英晶體振蕩器分為4類:普通晶體振蕩(TCXO),電壓控制式晶體振蕩器(vCXO),溫度補(bǔ)償式……
2019-12-25 石英晶振是高精度和高穩(wěn)定度的振蕩器,被廣泛應(yīng)用于彩電、計(jì)算機(jī)、遙控器等各類振蕩電路中,以及通信系統(tǒng)中用于頻率發(fā)生器、為數(shù)據(jù)處理設(shè)備產(chǎn)生時(shí)鐘信號(hào)和為特定系統(tǒng)提供基準(zhǔn)信號(hào)。 1、石英晶體振蕩器的結(jié)構(gòu) 石英晶體振蕩器是利用石英晶體(二氧化硅的結(jié)晶體)的壓電效應(yīng)制成的一種諧振器件,它的基本構(gòu)成大致是:從一塊……
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 當(dāng)我們在研究（research)電子線路的時(shí)候，不少人會(huì)提到晶振，其實(shí)根據(jù)分類來看，它包括兩大類型，第一個(gè)是無源晶振，另一個(gè)是有源晶振，那么我們在進(jìn)行了解的時(shí)候，不妨借此來全面分析(Analyse)一下第二個(gè)類型的晶振！ 對于有源晶振來說，其具備的特征是比較明顯的，它就是所謂的晶體振蕩器的全稱，對于它的引腳配件來……
2019-12-16 傳輸法測量線路如圖1所示，它是由訊號(hào)源、測試（TestMeasure)網(wǎng)絡(luò)和指示器三部分組成。為了保證一定的測量精度（精確度），對測量線路的各部分都有一定要求。 1、頻率(frequency)綜合器(即訊號(hào)源) 對頻率綜合器的要求是：輸出頻率穩(wěn)定（解釋:穩(wěn)固安定；沒有變動(dòng))度要優(yōu)于1×10-6/天;輸出阻抗……
2019-12-16 與有源晶體振蕩器相比，有源晶體振蕩器不需要數(shù)字信號(hào)處理器的內(nèi)部振蕩器，信號(hào)質(zhì)量好，相對穩(wěn)定（解釋:穩(wěn)固安定；沒有變動(dòng))，連接方式相對簡單(電源濾波主要完成，輸出通常采用電容和電感組成的pi型濾波網(wǎng)絡(luò)，信號(hào)用小電阻濾波)。與無源晶體相比，有源晶體振蕩器不需要復(fù)雜的配置(deploy)電路。有源晶體振蕩器的缺點(diǎn)是信號(hào)電平固……
