Broadband phase-looked loop frequency synthesizer
Title：
Broadband phase-looked loop frequency synthesizer
Application Number：
 02123425
Application Date：
 2002/06/28
Announcement Date：
 2002/12/18
Pub. Date：
Publication Number：
 1385968
Announcement Number：
 1134113
Grant Date：
Granted Pub. Date：
 2004-1-7
ApplicationType：
 Invention
State/Country：
 11[China|beijing]
IPC：
 H04B 1/16, H04L 7/033
Applicant(s)：
 Tsinghua Univ.
Inventor(s)：
 Li Yongming, Chen Hongyi, Wang Haiyong
Key Words：
 Broadband, phase-looked loop, frequency synthesizer
Abstract：
 This invention relates to phase-locked loop frequency synthesizer containing a discriminator, a charge pump, ring filter, a voltage controlled oscillato, a frequency divider and a digit control module connected in sequence forming a closed ring circuit characterizing in a logic level converting circuit connected between the discriminator and the charge pump, solving the problem of limited adjustable frequency sphere met with using CMOS technique integrated phase-locked loop frequency synthesizer and adopting two sets of different powers to enlarge the voltage variance sphere of the VCO to broad band adjustment an low power loss of the frequency synthesizer, suppressing flow-back of the VCO module.
Claim：
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PCT：
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