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首頁新聞中心 關(guān)于如何確定石英晶振中峰與峰之間的抖動

關(guān)于如何確定石英晶振中峰與峰之間的抖動

來源：http://m.wyss.net.cn 作者：金洛鑫電子 2024年01月05

Regarding how to determine peak-to-peak jitter,Cardinal Crystal Oscillator has been determined to accurately measure crystal oscillator jitter, below 1 picosecond at OR, which is currently the only method that can be used to measure 6G crystal oscillator phase noise and calculate RMS jitter. Please see our application note "Crystal Oscillators for Low jitter Applications" for a full explanation. To measure the phase noise of a crystal oscillator, we use a dual-source method. This results in a sideband measurement of the phase within a single 1Hz bandwidth within a specific offset frequency range. The single sideband phase noise results in integration over a specified frequency band, typically 10Hz to 1MHz or 12kHz to 20MHz, depending on the application. SONET requires a bandwidth of 12kHz to 20MHz. This frequency domain integrates phase noise (in dBc/Hz) which is then converted into time, and RMS jitter (in picoseconds).
關(guān)于如何確定石英晶振中峰與峰之間的抖動,Cardinal晶振已確定精確測量晶體振蕩器的抖動，在OR處低于1皮秒，這是目前唯一的方法,可用于測量6G晶振相位噪聲并計算有效值抖動。請參閱我們的應(yīng)用說明“晶體振蕩器用于低抖動應(yīng)用“的完整解釋。測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1Hz帶寬內(nèi)相位的邊帶測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)換為時間,RMS抖動（以皮秒為單位）。
 
In non-PLL oscillators with Cardinal crystal oscillators, the RMS jitter has a random Gaussian distribution because no phase-locked loop is used. This result is non-Gaussian in the absence of discrete spurious and multimodal distributions. Thus, there is little or no deterministic jitter power when powered by low noise. When the jitter has a Gaussian response, the RMS jitter is a standard deviation or a sigma value
在Cardinal晶振的非PLL振蕩器中，RMS抖動具有隨機(jī)高斯分布，因?yàn)闆]有使用鎖相環(huán)路。這個結(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，很少或沒有由低噪聲供電時的確定性抖動電源。當(dāng)抖動具有高斯時響應(yīng)，RMS抖動是標(biāo)準(zhǔn)差或一個西格瑪值。
 
The crystal oscillator used in the basic assembly has a very high Q value. Load the Q's oscillator resonator loop from 10,000 to more than 100,000. When the oscillator stage generates a signal, the frequency can reside in the oscillation bandwidth. However, for high-Q resonators with narrow oscillator bandwidths, oscillators can produce very low jitter.
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100，000。當(dāng)振蕩器級產(chǎn)生信號，頻率可以駐留在振蕩帶寬。但是，對于高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。
 
A Gauss distributed component oscillator with radix jitter, the mean of the period is located in the center of the Gaussian curve. The standard deviation (1 sigma) is defined as containing 68.26% of the total oscillations that occur. This window is placed on one side of the mean. The 1 sigma (standard deviation) value is the oscillator output signal. As the standard number deviates from the mean increases, the probability oscillator produces a significantly reduced signal with this period deviation. At 14.069 sigma, the probability is 1:112. Fibre Channel specifications require 14 sigma reliability.
基數(shù)抖動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。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大大減少。在14.069西格瑪時，概率為1：1012.光纖通道規(guī)格要求14西格瑪可靠性。
 
Determining peak-to-peak (Pk to Pk) values depends on the reliability required. The higher the reliability, the greater the Pk to Pk value, even if the probability of occurrence is with a higher Sigma value. At 14 sigma, the probability is close to 1:1012. This is considered the Pk to Pk jitter of the standard RMS jitter value that we use to determine. If the component oscillator has 2 picosecond RMS jitter, the Pk to Pk jitter is 28 picoseconds. 
Cardinal晶振確定峰到峰（Pk到Pk）值取決于關(guān)于所需的可靠性。可靠性越高,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，概率接近1：1012.這被認(rèn)為是我們用來確定的標(biāo)準(zhǔn)RMS抖動值的Pk到Pk抖動。如果組件振蕩器具有2皮秒RMS抖動，Pk到Pk抖動為28皮秒。
制造商零件編號 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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