公开(公告)号：EP1100193A3

公开(公告)日：2008-01-23

申请号：EP00123638.9

申请日：2000-10-30

申请人： Freescale Semiconductor, Inc.

发明人： Gu, Wang-Chang A. ,  Kommrusch, Richard Stephen

IPC分类号： H03H7/01 ,  H03H9/145 ,  H03H9/00 ,  H03H7/38

CPC分类号： H03H9/0004 ,  H03H7/01 ,  H03H7/1758 ,  H03H7/1775 ,  H03H7/383 ,  H03H9/0542

摘要： An integrated filter circuit and a method of fabrication are disclosed, wherein the integrated filter (11) has an input and an output parasitic shunt impedance. Input (17) and output (19) electrical components are coupled to the input (14) and output (15) terminals, respectively, to reduce the input and output parasitic shunt impedances. The input and output electrical components each include one of a coil (17,19), a section of transmission line (27,29), a coil (47,49) and tuneable capacitance (46,48) connected in a series tuned circuit, or a coil (37,39) and tuneable capacitance (26,38) connected in a parallel tuned circuit. The integrated filter includes input and output multilayer ceramic integrated coils (58) which may be positioned so that capacitive coupling between the coils substantially cancels inductive coupling therebetween, and/or an interlayer gridded ground wall is positioned between the input and output coils