公开(公告)号：EP3080910A1

公开(公告)日：2016-10-19

申请号：EP14869578.6

申请日：2014-11-26

申请人： Nokia Technologies OY

发明人： AGGARWAL, Sudhir ,  HASAN, Md. Naimul

IPC分类号： H03H19/00 ,  H04B1/10 ,  H04B1/04 ,  H03H11/04

CPC分类号： H03H7/0161 ,  H03H7/06 ,  H03H7/17 ,  H03H7/42 ,  H03H11/0422 ,  H03H19/002 ,  H03H19/004 ,  H03H2007/013 ,  H03H2210/012

摘要： Methods and apparatus, including computer program products, are provided for RF filtering. The apparatus comprises: a first bandpass filter to receive a differential signal, wherein the first bandpass filter comprises a resistive-capacitive configuration of N-path filters tunable to a first center frequency; a first notch filter to receive a first output of the first bandpass filter, wherein the first notch filter comprises a capacitive-resistive configuration of N-path filters tunable to a first notch center frequency; a second bandpass filter to receive a second output of the first notch filter, wherein the second bandpass filter comprises a resistive-capacitive configuration of N-path filters tunable to the first center frequency; a second notch filter to receive a third output of the second bandpass filter, wherein the second notch filter comprises a capacitive-resistive configuration of N-path filters tunable to a second notch center frequency; and a third bandpass filter to receive a fourth output of the second notch filter and to provide a filtered output of the apparatus, wherein the third bandpass filter comprises a resistive-capacitive configuration of N-path filters tunable to the first center frequency.