| Recently, with the development of frequency modulate technology and widely usage of all kinds of frequency sources, people are more eager to know the relationship between signal frequency and time, especially the character of frequency changing and twitter. Modulation domain analysisor can help researchers deeply understand the dynamic character of frequency and time interval. So we can regard it a kind of "frequency oscillograph". It makes the analysis of signal twitter and modulation very easy and the measurement of frequency drift and converting very simple. Therefore modulation domain analysis becomes a new way to analysis the complex signals.Objected to the character of modulation domain, this article mainly discuss the key technique such as analog interpolator which can improve the distinguish ratio and zero dead time counter which can prevent the loss of useful message during two sample gates. Furthermore we give the detailed analysis of some other key thchnique , discuss the measurement error and the way to minimize it. At the last we give the whole design which present my work and give my thoughts of future improvement. |
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