Is a
Patent attributes
Current Assignee
Patent Jurisdiction
Patent Number
Patent Inventor Names
Sang-Soo Ko0
Date of Patent
August 5, 2008
0Patent Application Number
115863810
Date Filed
October 25, 2006
0Patent Primary Examiner
Patent abstract
A sigma-delta fractional-N phase locked loop has faster lock time with increased charge pump current and decreased loop filter resistance in the unlock state. On the other hand, the sigma-delta fractional-N phase locked loop has lower noise susceptibility and lower frequency error with gradual decrease in charge pump current and gradual increase in loop filter resistance, in the lock state.
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