Cardinal晶振使用雙源方法有效測(cè)量石英晶振中峰與峰之間的抖動(dòng)
來(lái)源:http://taiheth.com 作者:泰河盛電子 2024年03月07
關(guān)于如何確定石英晶振中峰與峰之間的抖動(dòng),Cardinal晶振已確定精確測(cè)量晶體振蕩器的抖動(dòng),在OR處低于1皮秒,這是目前唯一的方法,可用于測(cè)量石英晶振相位噪聲并計(jì)算有效值抖動(dòng)。請(qǐng)參閱我們的應(yīng)用說(shuō)明“晶體振蕩器用于低抖動(dòng)應(yīng)用“的完整解釋。測(cè)量晶體振蕩器的相位噪聲,我們使用雙源方法。這導(dǎo)致單個(gè)1Hz帶寬內(nèi)相位的邊帶測(cè)量在特定偏移頻率范圍內(nèi)。單邊帶相位噪聲結(jié)果為在指定的頻率帶上積分,通常為10Hz至1MHz或12kHz至20MHz,具體取決于應(yīng)用程序。SONET要求帶寬為12kHz至20MHz。此頻域集成相位噪聲(以dBc/Hz為單位)然后轉(zhuǎn)換為時(shí)間,RMS抖動(dòng)(以皮秒為單位)。
在Cardinal晶振的非PLL振蕩器中,RMS抖動(dòng)具有隨機(jī)高斯分布,因?yàn)闆](méi)有使用鎖相環(huán)路。這個(gè)結(jié)果在缺乏離散雜散和多模態(tài)的情況下非高斯分布。因此,很少或沒(méi)有由低噪聲供電時(shí)的確定性抖動(dòng)電源。當(dāng)抖動(dòng)具有高斯時(shí)響應(yīng),RMS抖動(dòng)是標(biāo)準(zhǔn)差或一個(gè)西格瑪值。
基本組件中使用的石英晶體振蕩器具有非常高的Q值。加載的Q的振蕩器諧振器環(huán)路在10,000到超過(guò)100,000。當(dāng)振蕩器級(jí)產(chǎn)生信號(hào),頻率可以駐留在振蕩帶寬。但是,對(duì)于高Q諧振器實(shí)現(xiàn)窄振蕩帶寬、振蕩器可以制造出非常低的抖動(dòng)。
基數(shù)抖動(dòng)的高斯分布組件振蕩器,周期的平均值位于高斯曲線的中心。標(biāo)準(zhǔn)偏差(1西格瑪)定義為包含發(fā)生的總振蕩的68.26%。這窗口放置在均值的一側(cè)。1西格瑪(標(biāo)準(zhǔn)偏差)值是振蕩器輸出信號(hào)。作為標(biāo)準(zhǔn)的數(shù)量偏離均值增加,幾率振蕩器產(chǎn)生該周期偏差的信號(hào)大大減少。在14.069西格瑪時(shí),概率為1:1012.光纖通道規(guī)格要求14西格瑪可靠性。
Cardinal晶振確定峰到峰(Pk到Pk)值取決于關(guān)于所需的可靠性??煽啃栽礁?Pk到Pk值越大,即使發(fā)生概率隨著更高的西格瑪值。在14西格瑪時(shí),概率接近1:1012.這被認(rèn)為是我們用來(lái)確定的標(biāo)準(zhǔn)RMS抖動(dòng)值的Pk到Pk抖動(dòng)。如果組件振蕩器具有2皮秒RMS抖動(dòng),Pk到Pk抖動(dòng)為28皮秒。
制造商零件編號(hào) | 制造商 | 系列 | 頻率 | 頻率穩(wěn)定性 | 頻率容差 | 負(fù)載電容 |
CSM4Z-A2B3C3-40-12.0D18 | Cardinal晶振 | CSM4 | 12 MHz | ±30ppm | ±30ppm | 18pF |
CSM1Z-A5B2C3-40-14.7456D20 | Cardinal晶振 | CSM1 | 14.7456 MHz | ±50ppm | ±30ppm | 20pF |
CSM1Z-A0B2C3-100-5.0D18 | Cardinal晶振 | CSM1 | 5 MHz | ±50ppm | ±30ppm | 18pF |
CSM1Z-A5B2C5-40-14.7456D18 | Cardinal晶振 | CSM1 | 14.7456 MHz | ±50ppm | ±20ppm | 18pF |
CSM1Z-A2B2C3-40-30.0D18 | Cardinal晶振 | CSM1 | 30 MHz | ±50ppm | ±30ppm | 18pF |
CSM4Z-A2B3C3-60-6.0D18 | Cardinal晶振 | CSM4 | 6 MHz | ±30ppm | ±30ppm | 18pF |
CX325Z-A5B2C5-50-20.0D18 | Cardinal晶振 | CX325 | 20 MHz | ±50ppm | ±20ppm | 18pF |
CSM4Z-A2B3C3-40-10.0D18 | Cardinal晶振 | CSM4 | 10 MHz | ±30ppm | ±30ppm | 18pF |
CSM4Z-A2B3C3-40-29.49152D18-F | Cardinal晶振 | CSM4 | 29.49152 MHz | ±30ppm | ±30ppm | 18pF |
CSM1Z-A0B2C3-50-15.360D18 | Cardinal晶振 | CSM1 | 15.36 MHz | ±50ppm | ±30ppm | 18pF |
CSM1Z-A0B2C3-50-16.257D18 | Cardinal晶振 | CSM1 | 16.257 MHz | ±50ppm | ±30ppm | 18pF |
CSM1Z-A5B2C5-40-11.0592D18 | Cardinal晶振 | CSM1 | 11.0592 MHz | ±50ppm | ±20ppm | 18pF |
CSM1Z-A0B2C3-50-18.0D18 | Cardinal晶振 | CSM1 | 18 MHz | ±50ppm | ±30ppm | 18pF |
CSM1Z-A5B2C3-120-6.144D18 | Cardinal晶振 | CSM1 | 6.144 MHz | ±50ppm | ±30ppm | 18pF |
CSM1Z-A0B2C3-80-13.5D18 | Cardinal晶振 | CSM1 | 13.5 MHz | ±50ppm | ±30ppm | 18pF |
CSM1Z-A5B2C3-40-14.31818D18 | Cardinal晶振 | CSM1 | 14.31818 MHz | ±50ppm | ±30ppm | 18pF |
CSM1Z-A0B2C3-50-22.1184D18 | Cardinal晶振 | CSM1 | 22.1184 MHz | ±50ppm | ±30ppm | 18pF |
CSM1Z-A0B2C3-150-4.9152D18 | Cardinal晶振 | CSM1 | 4.915 MHz | ±50ppm | ±30ppm | 18pF |
CSM1Z-A5B2C5-150-3.6864D18 | Cardinal晶振 | CSM1 | 3.6864 MHz | ±50ppm | ±20ppm | 18pF |
CSM1Z-A0B2C3-100-7.3728D18 | Cardinal晶振 | CSM1 | 7.3728 MHz | ±50ppm | ±30ppm | 18pF |
CSM1Z-A0B2C3-50-25.175D18 | Cardinal晶振 | CSM1 | 25.175 MHz | ±50ppm | ±30ppm | 18pF |
CSM1Z-A0B2C3-50-28.63636D18 | Cardinal晶振 | CSM1 | 28.63636 MHz | ±50ppm | ±30ppm | 18pF |
CSM1Z-A5B2C3-60-9.216D18 | Cardinal晶振 | CSM1 | 9.216 MHz | ±50ppm | ±30ppm | 18pF |
CSM1Z-A5B2C3-120-6.0D18 | Cardinal晶振 | CSM1 | 6 MHz | ±50ppm | ±30ppm | 18pF |
CSM4Z-A2B3C3-40-26.0D18-F | Cardinal晶振 | CSM4 | 26 MHz | ±30ppm | ±30ppm | 18pF |
CSM1Z-A0B2C3-50-24.0D18 | Cardinal晶振 | CSM1 | 24 MHz | ±50ppm | ±30ppm | 18pF |
CSM1Z-A0B2C3-80-10.0D18 | Cardinal晶振 | CSM1 | 10 MHz | ±50ppm | ±30ppm | 18pF |
CSM1Z-A5B2C3-40-12.0D18 | Cardinal晶振 | CSM1 | 12 MHz | ±50ppm | ±30ppm | 18pF |
CSM1-A1B2C3-50-20.0D16 | Cardinal晶振 | CSM1 | 20 MHz | ±50ppm | ±30ppm | 16pF |
CSM1Z-A0B2C3-100-6.144D18 | Cardinal晶振 | CSM1 | 6.144 MHz | ±50ppm | ±30ppm | 18pF |
CSM1Z-A1B2C3-90-8.0D18 | Cardinal晶振 | CSM1 | 8 MHz | ±50ppm | ±30ppm | 18pF |
CSM1Z-A0B2C3-80-12.0D18 | Cardinal晶振 | CSM1 | 12 MHz | ±50ppm | ±30ppm | 18pF |
CSM4Z-A2B3C3-180-4.0D18 | Cardinal晶振 | CSM4 | 4 MHz | ±30ppm | ±30ppm | 18pF |
CSM1Z-A5B2C5-60-8.0D18 | Cardinal晶振 | CSM1 | 8 MHz | ±50ppm | ±20ppm | 18pF |
CSM1Z-A5B2C3-60-8.0D18 | Cardinal晶振 | CSM1 | 8 MHz | ±50ppm | ±30ppm | 18pF |
CSM1Z-A5B2C5-60-24.0D18 | Cardinal晶振 | CSM1 | 24 MHz | ±50ppm | ±20ppm | 18pF |
CSM1Z-A5B2C5-50-20.0D18 | Cardinal晶振 | CSM1 | 20 MHz | ±50ppm | ±20ppm | 18pF |
CSM4Z-A2B3C3-60-8.0D18 | Cardinal晶振 | CSM4 | 8 MHz | ±30ppm | ±30ppm | 18pF |
CSM4Z-A2B3C3-40-25.0D18-F | Cardinal晶振 | CSM4 | 25 MHz | ±30ppm | ±30ppm | 18pF |
CX5Z-A5B2C5-40-24.0D18 | Cardinal晶振 | CX5 | 24 MHz | ±50ppm | ±20ppm | 18pF |
CX5Z-A1B2C5-40-24.0D18 | Cardinal晶振 | CX5 | 24 MHz | ±50ppm | ±20ppm | 18pF |
CX5Z-A5B2C5-50-16.0D18 | Cardinal晶振 | CX5 | 16 MHz | ±50ppm | ±20ppm | 18pF |
CX5Z-A5B2C5-40-27.0D18 | Cardinal晶振 | CX5 | 27 MHz | ±50ppm | ±20ppm | 18pF |
CX5Z-A0B2C5-50-16.0D18 | Cardinal晶振 | CX5 | 16 MHz | ±50ppm | ±20ppm | 18pF |
CX5Z-A2B2C5-40-10.0D18 | Cardinal晶振 | CX5 | 10 MHz | ±50ppm | ±20ppm | 18pF |
CX532Z-A2B3C5-70-1966080D18 | Cardinal晶振 | CX532 | 19.6608 MHz | ±30ppm | ±20ppm | 18pF |
CX532Z-A2B3C5-70-33.0D18 | Cardinal晶振 | CX532 | 33 MHz | ±30ppm | ±20ppm | 18pF |
CX532Z-A5B3C5-70-27.0D18 | Cardinal晶振 | CX532 | 27 MHz | ±30ppm | ±20ppm | 18pF |
CX532AZ-A5B2C5-70-25.0D18 | Cardinal晶振 | CX532 | 25 MHz | ±50ppm | ±20ppm | 18pF |
CX532Z-A2B3C5-70-27.0D18 | Cardinal晶振 | CX532 | 27 MHz | ±30ppm | ±20ppm | 18pF |
CX532Z-A2B3C5-70-30.0D18 | Cardinal晶振 | CX532 | 30 MHz | ±30ppm | ±20ppm | 18pF |
CPFBZ-A2C4-32.768KD6 | Cardinal晶振 | CPFB | 32.768 kHz | - | ±10ppm | 6pF |
CPFBZ-A2C5-32.768KD12.5 | Cardinal晶振 | CPFB | 32.768 kHz | - | ±20ppm | 12.5pF |
CPFBZ-A2C4-32.768KD12.5 | Cardinal晶振 | CPFB | 32.768 kHz | - | ±10ppm | 12.5pF |
CPFBZ-A2C5-32.768KD6 | Cardinal晶振 | CPFB | 32.768 kHz | - | ±20ppm | 6pF |
CX532Z-A2B3C5-70-8.0D18 | Cardinal晶振 | CX532 | 8 MHz | ±30ppm | ±20ppm | 18pF |
CX532Z-A2B3C5-70-16.0D18 | Cardinal晶振 | CX532 | 16 MHz | ±30ppm | ±20ppm | 18pF |
CX532Z-A2B3C5-70-12.0D18 | Cardinal晶振 | CX532 | 12 MHz | ±30ppm | ±20ppm | 18pF |
CX5Z-ARB2C5-70-7.3728D18 | Cardinal晶振 | CX5 | 7.3728 MHz | ±50ppm | ±20ppm | 18pF |
CX5Z-A2B2C5-70-8.0D18 | Cardinal晶振 | CX5 | 8 MHz | ±50ppm | ±20ppm | 18pF |
CSM1Z-A0B2C3-70-14.7456D18 | Cardinal晶振 | CSM1 | 14.7456 MHz | ±50ppm | ±30ppm | 18pF |
CSM1Z-A0B2C3-50-16.000312D18 | Cardinal晶振 | CSM1 | 16.000312 MHz | ±50ppm | ±30ppm | 18pF |
CSM1Z-A0B2C3-50-16.0D18 | Cardinal晶振 | CSM1 | 16 MHz | ±50ppm | ±30ppm | 18pF |
CSM1Z-A0B2C3-50-17.734475D18 | Cardinal晶振 | CSM1 | 17.734475 MHz | ±50ppm | ±30ppm | 18pF |
CSM1Z-A0B2C3-80-11.0592D18 | Cardinal晶振 | CSM1 | 11.0592 MHz | ±50ppm | ±30ppm | 18pF |
CSM1-A1B2C3-70-14.7456D20 | Cardinal晶振 | CSM1 | 14.7456 MHz | ±50ppm | ±30ppm | 20pF |
CSM1Z-A1B2C3-200-3.6864D20 | Cardinal晶振 | CSM1 | 3.6864 MHz | ±50ppm | ±30ppm | 20pF |
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