公开(公告)号：EP4220958A1

公开(公告)日：2023-08-02

申请号：EP22207765.3

申请日：2022-11-16

申请人： The Boeing Company

发明人： Mentesana, Nicholas

IPC分类号： H03H11/12 ,  H03H15/02 ,  H03H17/02 ,  H03H17/00

摘要： Examples provide a method and apparatus for an analog bi-quad infinite impulse response, IIR, filter. An amplifier (108) generates a positive output signal (110) corresponding to a received RF signal and a negative output signal (112) . A set of selectively switchable time-delay circuits (114) associated with a positive arm of the filter causes a predetermined delay (116) corresponding to a desired sample frequency. A first set of configurable variable gain amplifiers (126) amplify the positive output signal to establish a set of positive coefficients (128). A set of selectively switchable time-delay circuits (118) associated with a negative arm of the filter causes a predetermined delay. A delayed negative output signal is generated which is amplified by a second set of configurable variable gain amplifiers (132) to establish a set of negative coefficients (134). A set of power combiners (130) function as sum junctions to combine the delayed positive output signals and the delayed negative output signals into a single output signal (136).