| 小数频率合成器噪声传函及动态特性建模仿真 |
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| 引用本文： | 胡悦,李章全,周健军.小数频率合成器噪声传函及动态特性建模仿真[J].信息技术,2008,32(7). |
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| 作者姓名： | 胡悦 李章全 周健军 |
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| 作者单位： | 上海交通大学微电子学院,上海,200240 |
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| 摘 要： | 对采用Δ-Σ小数分频频率合成器(Δ-Σ PLL)中离散采样行为进行了深入研究,提出了混合信号系统的传输函数表达式,并将该表达式运用在现有的锁相环时域模型之上,获得了环路中量化噪声以及压控振荡器(VCO)的噪声传输函数模型.此外,论述了一种简化计算方法用于获得三阶锁相环动态参数,并对Δ-Σ PLL噪声和闭环带宽的折衷进行了建模与仿真.
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| 关 键 词： | 小数频率合成 混合信号系统 动态分析 噪声特性 |
Modeling and simulation for fractional N frequency synthesizer noise and dynamics analysis |
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| HU Yue,LI Zhang-quan,ZHOU Jian-jun.Modeling and simulation for fractional N frequency synthesizer noise and dynamics analysis[J].Information Technology,2008,32(7). |
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| Authors: | HU Yue LI Zhang-quan ZHOU Jian-jun |
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| Affiliation: | HU Yue,LI Zhang-quan,ZHOU Jian-jun (Mircoelectronics School of Shanghai Jiaotong University,Shanghai 200240,China) |
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| Abstract: | The sample operation within a fractional N frequency synthesizer is closely investigated;one expression of transfer function for mixed signal system is proposed and employed on the fractional N synthesizer for an accurate modeling and noise analysis.The methods for simplification of dynamics analysis and parameter calculation,noise performance simulation are also proposed. |
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| Keywords: | fractional N synthesizer mixed signal system dynamics analysis noise performance |
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