本文選題：晶體振蕩器 + 老化　； 參考：《西安電子科技大學(xué)》2015年碩士論文

【摘要】：本文首先從晶體振蕩器的工作原理入手,對其物理特性、主要參數(shù)、常見晶振類型、主要影響因素以及主振電路做了簡單的介紹,然后主要針對性地對晶振的老化漂移特性與相位噪聲做了詳細(xì)的分析與研究。對于老化漂移特性,分析了其產(chǎn)生原因及其影響因素,抓住其老化規(guī)律建立老化預(yù)測數(shù)學(xué)模型,利用已有的老化數(shù)據(jù)與預(yù)測數(shù)據(jù)進(jìn)行比較,驗證模型是合理的,最后對老化進(jìn)行補償。對于晶振的相位噪聲特性,分析了相位噪聲的產(chǎn)生機(jī)理,通過選取低噪聲的元器件,研制出一只具有較高相位噪聲指標(biāo)的晶振。邊沿效應(yīng)是一個新興理論,通過對其進(jìn)行合理的應(yīng)用,可以提高測量裝置的精度。對于晶體振蕩器,從高分辨率的角度來看,其諧振與振蕩不是發(fā)生在同一個頻率點處,發(fā)生在一段連續(xù)頻率范圍內(nèi)。由于振蕩與諧振在該頻率范圍內(nèi)的不斷波動,在理想狀態(tài)下的嚴(yán)格諧振頻率值兩側(cè)會形成一個可能發(fā)生振蕩的區(qū)域,我們則將這段區(qū)域稱為晶振的模糊區(qū),由于模糊區(qū)的邊沿具有較高的穩(wěn)定性,因此可以利用晶振中的邊沿效應(yīng)來提高晶振的Q值。最后,本文對邊沿效應(yīng)做了詳細(xì)介紹與分析,并對晶體振蕩器中的邊沿效應(yīng)及其應(yīng)用進(jìn)行了深入研究。采用了一種雙晶體振蕩電路即用Q值更高的AT切晶體諧振器替換起選頻濾波作用的LC諧振濾波器,并通過CPU控制AT切晶振濾波器移動濾波線寬從而不斷壓縮晶振譜線寬度,限制晶體振蕩器振蕩在模糊區(qū)的邊沿處。通過實驗證明,利用邊沿效應(yīng)改善后的恒溫晶振相位噪聲與老化率指標(biāo)得到明顯改善。
[Abstract]:Starting with the working principle of the crystal oscillator, the physical characteristics, the main parameters, the common crystal vibration type, the main influencing factors and the main vibration circuit are briefly introduced in this paper. Then the aging drift characteristics and phase noise of the crystal oscillator are analyzed and studied in detail. The characteristics of the aging drift are analyzed. Cause and influence factors, grasp its aging law to establish the aging prediction mathematical model, compare with the existing aging data and forecast data, verify the model is reasonable, and finally compensate for aging. For phase noise characteristics of the crystal oscillator, the mechanism of phase noise generation is analyzed, and the low noise components are selected. A crystal oscillator with high phase noise is produced. The edge effect is a new theory. By reasonable application of it, the precision of the measuring device can be improved. For a crystal oscillator, from a high resolution angle, the resonance and oscillation are not at the same frequency point and occur in a continuous frequency range. Due to the constant fluctuation of oscillation and resonance in the frequency range, a region of possible oscillation will be formed on both sides of the strict resonant frequency value in the ideal state. We call this region a fuzzy region of crystal oscillator, because the edge of the fuzzy region has a high stability, so the edge effect in the crystal oscillator can be improved. The Q value of the crystal oscillator. Finally, the edge effect is introduced and analyzed in detail, and the edge effect and its application in the crystal oscillator are deeply studied. A double crystal oscillating circuit is used to replace the LC resonant filter with the selective frequency filtering function with the higher AT tangent crystal resonator with Q, and the AT cut crystal vibration filter is controlled by CPU. The wave width reduces the width of the crystal line and limits the oscillation of the crystal oscillator at the edge of the blurred region. The experimental results show that the phase noise and the aging index of the constant temperature crystal oscillator are improved by the edge effect.

【學(xué)位授予單位】：西安電子科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TN752

【參考文獻(xiàn)】

相關(guān)期刊論文 前4條

1 柳麗,陳之純,曾元峰;石英晶振老化的建模與模型求解[J];上海航天;2004年03期

2 龔美霞;石英晶體元器件技術(shù)的發(fā)展及應(yīng)用[J];國外電子元器件;2001年01期

3 蘭楊茂,胡昌洪;直流放大器零點漂移的控制[J];電子對抗技術(shù);2000年02期

4 胡錦麟;施松江;;晶體振蕩器的對數(shù)老化規(guī)律[J];電子技術(shù);1980年12期

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本文編號：1832267