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Design of Passive Filter for Charge Pump Phase-Locked Loop

2013-09-29
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Design of Passive Filter for Charge Pump Phase-Locked Loop http://www.cqvip.com Vol. 3 3, No. 4 August 2003 Article No.: 1 0 0 4 ― 3 3 6 5 ( 2 0 0 3 ) 0 4 ― 0 3 3 9 ― 0 5 Microelectronics Micro ｃｒｏｅｌｅｃｔｒｏｎｉｃｓｖ０１．３３． № ４ A ｕｇ．２００３ Design of Passive Filter for Charge Pump Phase-Locked Loop Jiang (Application Specific Integrated Circuit Design Laboratory, Huazhong University of Science and Technology, Wuhan 43 00 74, Hubei) Department of Electronic Science and Technology Abstract: The design method of loop filter in phase-locked loop used in wireless communication field is discussed. The passive low-pass filter in the charge pump phase-locked loop is designed based on the method of analyzing the AC frequency domain characteristics of the phase-locked loop. The design method of the basic passive filter is discussed in this paper, and the design process of the third-order passive low-pass filter is emphasized. The simulation results of the filter and the charge pump phase-locked loop designed by this method are given. Keywords: charge pump; phase-locked loop; loop filter; passive low-pass filter ｒｙｏｆＣｈａｒｇＰｕｍｐＨａｓｅ－ＬｏｃｋｅｄＬｏｏｐＪＩＡＮＧｅｉ，ＬｉＵＳａｎ ― ｑｉｎｇ，ＬｉＮａｉ ― ｐｉｎｇ，ＣＨＥＮＺｈａｏ（ＬａｂｏｒａｔｏｒｙｏｆＣｈｉａｒｇＰｕｍｐＨａｓｅ－ＬｏｃｋｅｄＬｏｏｐＪＩＡＮＧ

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