한국해양대학교

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3차 PLL 주파수합성기의 1/f 잡음 모델링에 관한 연구

Title
3차 PLL 주파수합성기의 1/f 잡음 모델링에 관한 연구
Alternative Title
A Study on and 1/f Noise Modeling of the Frequency Synthesizer Using the Third-Order PLL
Author(s)
金炯道著
Publication Year
2001
Publisher
한국해양대학교 대학원
URI
http://kmou.dcollection.net/jsp/common/DcLoOrgPer.jsp?sItemId=000002173722
http://repository.kmou.ac.kr/handle/2014.oak/8077
Abstract
The phase noise of PLL frequency synthesizer brings about a distortion of the signal in communication systems.


In this thesis, the frequency synthesizer using the third-order PLL was designed in order to predict the phase noise.


With Lascari's method, a variation of phase noise was analyzed in accordance with offest frequency, and the aspect of the 1/f- noise which give rise to troubles in the low frequency band specially was analyzed.


Since it is difficult to analyze mathematically 1/f-noise in the third-order PLL, the concept of pseudo-damping factor was introduced to access easily the 1/f-noise variance.


A numerical formula of 1/f-noise variance was shown in the third-order PLL, which was compared with that of 1/f-noise variance in the second-order PLL.


From the simmulation result, it was known that 1/f-noise variance in the third-order PLL exhibited inferior to suppression characteristics of that in the second-order PLL because of its noise bandwidth and 1/f noise variance factor over the damping factor in the range of 0.707 and 1
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전파공학과 > Thesis
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