There is a pll ( phase locked loops ) in system to get a high - stability low - noise high - frequency signal 固定频率振荡器通常采用锁相环技术来获得高稳定度、低相位噪声的高频输出信号。
In various high performance , wide dynamic range frequency convertings , phase noise is a main limiting factor 在各种高性能、宽动态范围的频率变换中,相位噪声是一个主要的限制因素。
In this paper , the form and detection of phase noise is presented and the effect of phase noise in qam modulation is analyzed 摘要分析了相位噪声的成因、测量以及相位噪声对系统的影响。
With consideration of parameters trade - offs involved in the circuits , the vco ’ s topology is designed 考虑压控振荡器设计指标的相互约束条件,尽可能减小相位噪声的来源,设计电路的拓扑结构。
The paper was based on the goal of low phase noise , high resolution to study and analyze the wideband frequency source 本文正是基于低相位噪声、高分辨率为目的,对宽带频率源作了研究和分析。
The subject is to study the design theory and engineering realization of the low phase - noise dro - pll in microwave band 在这样的背景下，本课题对低相位噪声微波dro pll的设计理论和工程实践进行了研究。
The adc aperture jitter must be minimal , and the sampling clock generated from a low phase - noise quartz crystal oscillator Adc的孔径抖动必需尽可能的小，而且要使用低相位噪声的石英晶体振荡器作为采样时钟发生器。
2 . the vco ’ s topology is presented according to the conditions of low voltage - supply , low power consumption , low phase noise and large tuning range 2 .以低压、低功耗、低相位噪声和较大调谐范围为原则完成压控振荡器的电路结构设计。
The synthesizer with the low phase noise , highly pure spectrum and high - speed frequency agility has became the tendency to the frequency synthesis technology 低相位噪声、高纯频谱和高速捷变的频率合成器成为频率合成技术发展的主要趋势。
It introduces the phase noise measurement method of hf radar ' s transmitting signal , especially the measurement method of low phase noise which is close - in to carrier frequency 指出了在高频雷达发射信号相位噪声的测量，特别是近载频低相位噪声的测量。
