公开(公告)号：US20180302097A1

公开(公告)日：2018-10-18

申请号：US15590776

申请日：2017-05-09

申请人： Beken Corporation

发明人： Dawei GUO ,  Caogang YU

IPC分类号： H03L7/197 ,  H03L7/087 ,  H03L7/089

CPC分类号： H03L7/1976 ,  H03C3/0925 ,  H03C3/0933 ,  H03K23/68 ,  H03L7/06 ,  H03L7/085 ,  H03L7/087 ,  H03L7/0891 ,  H03L7/18 ,  H03M7/3004

摘要： A fractional-N frequency synthesizer comprising a multi-phase generator, a multi-path error phase generator; a current combiner; a loop filter connected to the current combiner; an oscillator (150) connected to the loop filter; a frequency divider (160); a SDM connected to both the frequency divider and the multi-phase generator, to generate variable division ratio.